Lewiston, Idaho Weather Conditions

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Current Conditions

  • 36°
  • Fog
  • Wind: SSE 4 mph
  • Humidity: 97%
  • Visibility: 0.2 miles
  • Dew Point: 35°
  • Pressure: 30.08 in. +
  • Heat Index: 33

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Next 12 Hours

7  pm
10  pm
1  am
4  am
7  am
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Chance of Snow
Chance of Snow
Chance of Snow
Chance of Snow
41°
36°
36°
34°
34°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Rain
  • High: 46 °
  • Low: 34 °
  • Rain
  • Saturday
  • Chance Rain
  • High: 46 °
  • Low: 43 °
  • Chance Rain
  • Sunday
  • Rain
  • High: 57 °
  • Low: 39 °
  • Rain
  • Monday
  • Chance of Rain
  • High: 46 °
  • Low: 36 °
  • Chance of Rain
  • Tuesday
  • Chance of Rain
  • High: 48 °
  • Low: 37 °
  • Chance of Rain

Forecast for Lewiston, Idaho

Updated: 7:00 PM PST on December 19, 2014

  • Friday

    Overcast with rain. High of 46F. Winds from the South at 5 to 10 mph. Chance of rain 90%.

  • Friday Night

    Mostly cloudy with a chance of snow and rain showers after midnight. Low of 34F. Winds less than 5 mph. Chance of snow 60%.

  • Saturday

    Overcast with a chance of rain, then rain in the afternoon. Fog early. High of 46F. Winds from the SE at 5 to 15 mph. Chance of rain 90%.

  • Saturday Night

    Overcast with rain. Fog overnight. Low of 43F. Breezy. Winds from the SW at 15 to 20 mph. Chance of rain 90% with rainfall amounts near 0.4 in. possible.

  • Sunday

    Overcast with rain. High of 57F. Breezy. Winds from the WSW at 10 to 20 mph. Chance of rain 70%.

  • Sunday Night

    Overcast with rain. Low of 39F. Winds from the WSW at 10 to 15 mph. Chance of rain 70%.

  • Monday

    Overcast with a chance of rain. High of 46F. Winds from the WSW at 5 to 10 mph. Chance of rain 30%.

  • Monday Night

    Overcast. Low of 36F. Winds from the SSE at 5 to 10 mph.

  • Tuesday

    Overcast with a chance of rain in the afternoon. High of 48F. Winds from the South at 5 to 10 mph. Chance of rain 20%.

  • Tuesday Night

    Overcast with a chance of rain. Low of 37F. Winds from the SSW at 5 to 10 mph shifting to the West after midnight. Chance of rain 40%.

  • Wednesday

    Mostly cloudy with a chance of rain. High of 43F. Winds less than 5 mph. Chance of rain 50%.

  • Wednesday Night

    Mostly cloudy with a chance of snow. Low of 32F. Winds less than 5 mph. Chance of snow 40%.

  • Thursday

    Partly cloudy. High of 39F. Winds from the WNW at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Fog overnight. Low of 16F. Winds less than 5 mph.

  • Friday

    Partly cloudy. Fog early. High of 37F. Winds from the West at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Low of 23F. Winds less than 5 mph.

  • Saturday

    Partly cloudy with a chance of snow. Fog early. High of 28F. Winds less than 5 mph. Chance of snow 30%.

  • Saturday Night

    Mostly cloudy with a chance of snow. Fog overnight. Low of 21F. Winds less than 5 mph. Chance of snow 50% with accumulations up to 1 in. possible.

  • Sunday

    Overcast with a chance of snow. Fog early. High of 27F. Winds less than 5 mph. Chance of snow 40% with accumulations up to 1 in. possible.

  • Sunday Night

    Overcast with a chance of snow. Fog overnight. Low of 19F. Winds less than 5 mph. Chance of snow 40% with accumulations up to 1 in. possible.

  • Monday

    Partly cloudy with a chance of snow. Fog early. High of 25F. Winds less than 5 mph. Chance of snow 40%.

  • Monday Night

    Clear. Fog overnight. Low of 19F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Normal Hill Weather Station, Lewiston, ID

Updated: 7:43 PM PST

Temperature: 40.3 °F Dew Point: 32 °F Humidity: 73% Wind: Calm Pressure: 31.01 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Nick's Weather Station, Lewiston, ID

Updated: 7:39 PM PST

Temperature: 39.8 °F Dew Point: 37 °F Humidity: 90% Wind: Calm Pressure: 30.04 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Harvest Vista/Pheasant Trail Estates @ Schaub Ranch, Lewiston, ID

Updated: 7:43 PM PST

Temperature: 36.6 °F Dew Point: 35 °F Humidity: 94% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Dan and Judy's, Clarkston, WA

Updated: 7:28 PM PST

Temperature: 39.0 °F Dew Point: 39 °F Humidity: 99% Wind: West at 3.1 mph Pressure: 29.93 in Hourly Precipitation: - Windchill: 37 °F Graphs

Location: Clarkston Heights, Clarkston, WA

Updated: 7:43 PM PST

Temperature: 39.5 °F Dew Point: 37 °F Humidity: 92% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Clarkston Heights - Florence Lane, Clarkston, WA

Updated: 7:42 PM PST

Temperature: 39.7 °F Dew Point: 40 °F Humidity: 99% Wind: Calm Pressure: 29.94 in Hourly Precipitation: - Windchill: 40 °F Graphs

Location: Lapwai-ID, Lapwai, ID

Updated: 7:40 PM PST

Temperature: 42.8 °F Dew Point: - Humidity: 88% Wind: North at - Pressure: 28.82 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: MesoWest Silcott Island WA US AGRIMET, Clarkston, WA

Updated: 6:00 PM PST

Temperature: 43 °F Dew Point: 41 °F Humidity: 93% Wind: WSW at 2 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: HADS ALPOWA CREEK AT MOUTH NEAR CLARK WA US WADOECO, Clarkston, WA

Updated: 4:15 PM PST

Temperature: 42 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: ITD Cottonwood ID US, Juliaetta, ID

Updated: 6:45 PM PST

Temperature: 38 °F Dew Point: 38 °F Humidity: 100% Wind: SE at 4 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: MesoWest Alpowa Summit WA US WA DOT, Pomeroy, WA

Updated: 6:10 PM PST

Temperature: 37 °F Dew Point: 30 °F Humidity: 76% Wind: SSW at 10 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: ITD Shirrod Hill ID US, Genesee, ID

Updated: 6:45 PM PST

Temperature: 36 °F Dew Point: 36 °F Humidity: 99% Wind: SSE at 6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Town of Colton, Colton, WA

Updated: 7:40 PM PST

Temperature: 33.1 °F Dew Point: 31 °F Humidity: 91% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: APRSWXNET Troy ID US, Troy, ID

Updated: 7:01 PM PST

Temperature: 35 °F Dew Point: 34 °F Humidity: 98% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Moose Draw, Troy, ID

Updated: 7:32 PM PST

Temperature: 34.7 °F Dew Point: 34 °F Humidity: 98% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Westview, Moscow, ID

Updated: 7:36 PM PST

Temperature: 35.9 °F Dew Point: 34 °F Humidity: 93% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Eid Rd, foot of Paradise Ridge, Moscow, ID

Updated: 7:42 PM PST

Temperature: 35.4 °F Dew Point: 33 °F Humidity: 90% Wind: SW at 5.1 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Lamb Road, Troy, ID

Updated: 7:42 PM PST

Temperature: 35.3 °F Dew Point: 34 °F Humidity: 97% Wind: SSE at 2.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: RAWS MISSION CREEK ID US, Winchester, ID

Updated: 7:03 PM PST

Temperature: 38 °F Dew Point: 29 °F Humidity: 70% Wind: South at 12 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Montgomery Ridge Road, Anatone, WA

Updated: 7:42 PM PST

Temperature: 34.2 °F Dew Point: 30 °F Humidity: 86% Wind: SSE at 6.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Reubens-ID, Reubens, ID

Updated: 7:40 PM PST

Temperature: 32.7 °F Dew Point: - Humidity: 88% Wind: North at - Pressure: 26.34 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Camas Prairie, Reubens, ID

Updated: 7:43 PM PST

Temperature: 34.0 °F Dew Point: 31 °F Humidity: 88% Wind: SSW at 5.8 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: ITD Winchester ID US,

Updated: 2:44 AM GMT

Temperature: 31 °F Dew Point: 30 °F Humidity: 99% Wind: SSW at 2 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: HADS SOLDIERS MEADOW RESERVOIR AND DA ID US USBR, Winchester, ID

Updated: 6:45 PM PST

Temperature: 35 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Spokane Washington 
558 PM PST Friday Dec 19 2014 


Synopsis... 
a more active weather pattern will continue into early next week. 
Another weather system will bring snow to the mountains with 
mainly rain for the valleys tonight into Friday. A stronger storm 
Saturday into Sunday will bring mainly rain for the valleys...as 
well as mountain snow with rising snow levels. Temperatures are 
expected to remain above average through early next week...before 
dropping down towards normal values by Christmas day. 


&& 


Discussion... 
tonight: a cold front and supporting upper trough will continue 
to push east this evening, but the warm front ahead of the next 
system will begin to enter from the west overnight. This will 
support an overall drying trend across much of the region, with 
the main snow risk shifting into Panhandle mountains through the 
evening and overnight. The approach of the next warm front will 
renew the precipitation threat toward the Cascades and western 
Columbia Basin overnight. Otherwise look for mostly cloudy skies 
east and partly cloudy skies in the west this evening, with more 
clouds expanding across the region late this evening and overnight 
with the aforementioned warm front. /J. Cote' 


..heavy snow expected over the higher mountains and Cascade 
valleys Saturday into early Sunday... 


Saturday through Sunday...very moist atmospheric river is still 
poised to impact the region this period. As of 2pm...the leading edge 
of the river was located near 133w and streaming rapidly 
eastward. Although some of the moisture from this river could 
produce some light precipitation later tonight...it looks like the 
brunt of the moisture and ascent associated with it will push into 
the Cascades early tomorrow morning and slide across the remainder 
of the inland northwest during the day. The main burnt of this 
precipitation will be delivered via a fairly robust warm 
front...which should move into the Cascades by midday and into the 
Idaho Panhandle by late afternoon. The ascent will be strong 
enough that all locations receive precipitation...the big question 
is where will most of it fall and what will it fall as. It still 
looks good that the heaviest precipitation will fall near the 
Cascades with amounts ranging from 1.5-3.0 inches near the crest 
and anywhere from 1-2 inches over The Blues and Idaho Panhandle 
mountains. Meanwhile totals in between should generally range from 
30-.80 inches. These are very impressive amounts...and would be 
higher if the atmospheric river decided to remain fixed over our 
forecast area. However chances are good that the core of the 
moisture drift toward the Washington-Oregon border by evening so 
much heavier precipitation will be possible south of our area. As 
far as what precipitation type to expect...this is the big 
question...and a not very confident answer...at least for the 
Cascade valleys. Our confidence is highest that the Cascade 
mountains...will see the largest amounts of snow...especially 
north of Lake Chelan and at elevations above 3000 feet. 1-2 feet 
of snow still looks like a good possibility. Moderate snow amounts 
are also quite likely for the northern mountains near the Canadian 
border...with totals ranging from 4-8 inches mainly at elevations 
above 3000. Similar totals also look possible for the central 
Panhandle mountains...however snow levels will be about 4000 feet 
or higher. This will likely impact travel conditions both at 
Sherman and lookout passes and we will address via a weather 
story. Snow levels will rise rapidly at both sites after the front 
moves through. In fact by early Sunday morning...snow levels could 
rise to 6k feet or higher south of I-90 and up to 4k feet near the 
Canadian border. The toughest question to answer is what to do 
with the Cascade valleys. There is no question that when the 
precipitation starts it will do so as snow. However how long will 
it remain that way? The GFS and European model (ecmwf) models have been too cold of 
late at locations such as Mazama and plain and the temperatures at 
both sites will be critical in determining how long they can get 
accumulating snow. The NAM was a little better but even it was too 
cold compared to current readings. The key will be how cold will 
temps get tonight. At least there are some partly cloudy skies 
headed that way so there is potential for some good radiational 
cooling this evening. It remains to be seen if temps in those 
areas can drop well into the 20s tonight like the models are 
suggesting...but we have some doubts. If we believe those model 
solutions...it would never changeover to rain at Mazama and would 
only do so at plain by tomorrow evening. The NAM has a better 
handle on the situation...and switches plain over by mid- 
afternoon...and Mazama by evening. But based on cold bias suspect 
this changeover could occur a little sooner. Nonetheless that 
leaves a good amount of time for accumulating snow with 4-8 of 
snow a possibility. We will issue a Winter Weather Advisory for 
snow...and word some uncertainty into the product. 


While most locations won't experience snow...most should see 
breezy conditions develop Saturday night and continue into Sunday 
as the surface low passes through southeast British Columbia. Since we won't really see 
strong cold air advection it isn't a prime setup for mixing strong 
winds aloft to the ground. Nonetheless we expect to see breezy 
conditions...especially over the Palouse...eastern Columbia 
Basin...Blue Mountains and Lewiston area. These winds will deliver 
very warm temperatures with highs surging into the middle 40s to 
middle 50s. Fx 


Sunday night through tuesday: timeframe will be a significant 
transition period with a shift from the very moist atmospheric 
river to a drier and more stable ridge pattern by Monday 
afternoon. Activity level then ramps up again by Tuesday with 
another approaching wave of energy. Pattern splits late Sunday 
with the general storm track and associated energy shifting to 
the north while the subtropical plume of moisture shifts to the 
south. Both the Euro and GFS currently depict this quite well 
ending the threat of widespread precipitation Sunday for the 
inland northwest. With the continued westerly component of the upper 
level winds and limited remnant moisture streaming in, 
topographically induced showers (mostly in the form of snow) 
remain into Monday. Best chance for precip will reside in the 
Cascades and Panhandle mountains, but only lighter amounts are 
expected. Coupled with this mountain precip, stronger 
northwesterly flow allows cooler maritime Pacific air to 
penetrate dropping our snow levels early in the period. For now 
I feel the cooler air will penetrate deep enough to promote snow 
in the northern and central mountains with the southern locations 
taking a bit longer to transition. 


By Monday morning the ridge continues to amplify off the coast 
further strengthening the mentioned cool northwest flow. Stability rises 
which lowers the precip chances regionwide and allows for winds 
from previous days to diminish. Overall Monday appears to be a 
rather lackluster day with the ridge quickly moving through the 
region. With stable conditions, recent precipitation, light 
surface winds and falling overnight temperatures, Monday night 
looks to bring a decent chance for fog around portions of the 
region. Exact locations at this point brings low confidence so it 
was left out of the forecast. The Main Key with fog will likely 
be the amount of breaks in the cloud cover and timing as well. 


Early Tuesday is where models start to diverge as the Euro would 
bring another wave through the region whereas the GFS holds off 
until late Tuesday. For now I have sided with the more aggressive 
Euro bringing the moisture in throughout the day. This brings a 
good shot of precipitation to much of the region. Continued cold 
air advection in the northwesterly flow allows snow levels to 
further drop bringing more mountain snow with even some valleys 
along the Canadian border seeing the potential for snow as well. 
The further south we go, the lesser the chance for snow and 
better the chance for rain. With a bit of model uncertainty at 
this point, snow levels and the timing of precipitation will 
likely need to be fine tuned once better consistency is achieved. 
Overall a real roller coaster ride of activity is expected for 
this short period of time at the beginning of next week. /Fliehman 


Tuesday night through thursday: there is a high degree of 
confidence that a rich plume of subtropical moisture will interact 
with an incoming trof...yielding a deepening low pressure system 
within the boundaries of the northwestern US during the Tuesday 
night- Thursday morning time-frame. Exactly where this sets up 
continues to carry high uncertainty and the last 24 hours of model 
runs have brought US no closer to pin pointing the area. For 
several days, model trends were pushing the axis of heavier precip 
to the south...which at times was even displaced south of the 
Washington/or border. Last night, models began reversing and the axis of 
heavier precip was brought back into northern Washington/Idaho then with this 
morning's runs, some guidance remained north while others split 
the difference. There is moderate confidence that the air mass 
will remain too mild initially to support any snow in the valleys 
except along the immediate Canadian border but cooler air will 
move in during the time of cyclogenesis Christmas eve and snow 
levels will fall. So at this time, we made little changes to the 
forecast which puts more weight on the slightly more stable European model (ecmwf) 
but rather than go into details pertaining to this model, which 
could change drastically over the course of 12 hours, here is a 
break down of what could be the high impacts from this period of 
busy Holiday travel. 


- There is a moderate potential for snow to impact mountain passes 
starting early Wednesday morning and continuing through Christmas 
morning. Depending where the heaviest precip sets up...travel may 
be hazardous at times. 


- If the storm takes a more northern track, all region mountain 
passes could experience heavy snow and a small potential other 
lowland locations could receive some periods of snow . This 
solution also presents the possibility for stronger winds across 
the Columbia Basin and mountains. 


- If the storm takes a more southern track, Stevens Pass could see 
much less snow as could the I-90 corridor but this corridor will 
be right on the border. Winds will also be significantly weaker a 
and most of northern Washington/Idaho could see very little precipitation. 


- The Camas Prairie, blue mtns, and central Panhandle mtns of Idaho 
continue to carry the highest probabilities for snow 
accumulations into lower elevations (at this time...roughly 2000 
feet and higher) for Christmas eve into Christmas morning. This 
holds true for most model solutions whether or not they supported 
a northern or southern storm track, a northern track would delay 
timing some. 


This developing storm/potential for moderate precip will be through 
Wednesday night then northwest flow will begin to take over 
through the day on Christmas bringing in cooler and drier from 
north to south with light snow gradually coming to an end over the 
far southeastern zones (blue mtns, Camas Prairie, lower Idaho 
panhandle). Gusty north winds will channel through the Okanogan 
Valley but should be well below advisory limits with the air mass 
lacking any Arctic origins. Large scale northwest flow will 
continue into Friday with the potential for a weak wave or two 
passing through the region keeping some mention of snow showers 
into the weekend. /Sb 




&& 


Aviation... 
00z tafs: look for a return to IFR/LCL LIFR conditions later this 
evening...aft 06z for kgeg...ksff...kcoe...kmwh. Then the threat 
of rain re-develops after about 11z for keat and kmwh and moves east 
through the morning hours. 


&& 


Preliminary point temps/pops... 
Spokane 33 40 39 46 35 40 / 10 90 90 30 20 20 
Coeur D'Alene 33 38 37 45 35 40 / 20 80 90 40 50 30 
Pullman 34 42 41 50 39 46 / 20 90 100 80 50 20 
Lewiston 33 45 43 57 42 50 / 10 70 90 70 70 30 
Colville 32 37 36 41 30 36 / 10 100 100 20 20 10 
Sandpoint 32 36 35 40 33 37 / 30 90 100 60 60 30 
Kellogg 31 38 36 42 35 38 / 40 90 100 90 90 40 
Moses Lake 34 41 40 48 34 44 / 20 90 80 10 10 10 
Wenatchee 32 36 36 45 35 42 / 20 100 90 20 20 10 
Omak 30 35 34 39 28 36 / 20 100 80 10 10 10 


&& 


Otx watches/warnings/advisories... 
Idaho...none. 
Washington...Winter Weather Advisory from 4 am to 11 PM PST Saturday for east 
slopes northern Cascades. 


&& 



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