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Mountain Top, Washington Weather Forecast
Mountain Top, Washington Weather
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Weather Forecast for Mountain Top, Washington : Columbia County
Issued: 10:51 pm PST Dec 15, 2025 Latitude: 46.2418115 Longitude: -117.7643618 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
20% chance of rain & snow on Tonight 40% chance of rain on Tuesday 80% chance of blowing snow on Wednesday 100% chance of rain & snow on Thursday 80% chance of snow on Friday 20% chance of snow on Saturday 20% chance of snow on Sunday Rain and Snow on Monday
Low: 39°F High: 45°F High: 37°F High: 42°F High: 36°F High: 32°F High: 34°F High: 36°F
Low: 29°F Low: 31°F Low: 35°F Low: 28°F Low: 28°F Low: 31°F  
Rain & Snow Rain Blowing Snow Rain & Snow Snow Snow Snow Rain and Snow
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Current Conditions at
WALLA WALLA - (KALW)
55°
Cloudy
as of 10:53 PM PST
Rel. Humidity: 66%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
14 MPH
190° South
Cloud Level(s): Broken at 7500ft, Solid Overcast at 10000ft
Current Conditions at
LEWISTON - (KLWS)
57°
Mostly Cloudy
as of 10:56 PM PST
Rel. Humidity: 50%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 7500ft, Broken at 10000ft
Current Conditions at
PULLMAN - (KPUW)
48°
Feels like 42°F
Clear
as of 10:53 PM PST
Rel. Humidity: 70%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 33 MPH
250° West
Cloud Level(s): Clear
20% chance of rain & snow Tonight Tonight... A 20 percent chance of rain. Snow level 6200 feet lowering to 5500 feet. Mostly cloudy, with a low around 39. Windy, with a southwest wind 25 to 34 mph, with gusts as high as 48 mph.
40% chance of rain Tuesday Tuesday... A 40 percent chance of rain, mainly after 4pm. Partly sunny, with a high near 45. Southwest wind around 21 mph, with gusts as high as 33 mph.
100% chance of rain & snow Tuesday Night Tuesday Night... Rain before 4am, then rain, possibly mixed with snow. Some thunder is also possible. Low around 29. Very windy, with a southwest wind 28 to 33 mph increasing to 35 to 40 mph after midnight. Winds could gust as high as 65 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
80% chance of blowing snow Wednesday Wednesday... Rain, possibly mixed with snow, becoming all snow after 7am, then gradually ending. Areas of blowing snow before 10am. High near 37. Very windy, with a west wind 41 to 46 mph decreasing to 34 to 39 mph in the afternoon. Winds could gust as high as 60 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
30% chance of snow Wednesday Night Wednesday Night... A 30 percent chance of snow after 10pm. Mostly cloudy, with a low around 31. Breezy, with a south wind 15 to 24 mph, with gusts as high as 34 mph.
100% chance of rain & snow Thursday Thursday... Snow before 1pm, then rain, possibly mixed with snow. High near 42. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
100% chance of rain & snow Thursday Night Thursday Night... Rain and snow. Snow level 6400 feet lowering to 5400 feet after midnight . Low around 35. Windy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
80% chance of snow Friday Friday... Snow. High near 36. Breezy. Chance of precipitation is 80%.
50% chance of snow Friday Night Friday Night... A 50 percent chance of snow. Mostly cloudy, with a low around 28.
20% chance of snow Saturday Saturday... A chance of snow. Partly sunny, with a high near 32.
20% chance of snow Saturday Night Saturday Night... A chance of snow. Mostly cloudy, with a low around 28.
20% chance of snow Sunday Sunday... A chance of snow. Partly sunny, with a high near 34.
Snow on Sunday Night Sunday Night... Snow likely. Mostly cloudy, with a low around 31.
Rain and Snow on Monday Monday... Rain and snow likely. Mostly cloudy, with a high near 36.
Sun Almanac for Mountain Top, Washington
Sunrise: 07:28 AM
Sunset: 4:06 PM
Civil Sunrise:06:53 AM
Civil Sunset: 4:40 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:19 PM
Astro Sunrise: 05:39 AM
Astro Sunset: 5:55 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.