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Dayton, Washington Weather Forecast
Dayton, Washington Weather
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Weather Forecast for Dayton, Washington : Columbia County
Issued: 4:21 am PST Dec 16, 2025 Latitude: 46.3237525 Longitude: -117.9724367 View on Google Maps

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Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
30% chance of rain on Today 100% chance of rain on Tonight 70% chance of rain & snow on Wednesday 100% chance of rain & snow on Thursday 80% chance of rain on Friday 40% chance of rain & snow on Saturday 20% chance of rain & snow on Sunday Rain and Snow on Monday
High: 58°F Low: 37°F High: 48°F High: 53°F High: 45°F High: 43°F High: 46°F High: 49°F
Low: 35°F Low: 38°F Low: 33°F Low: 31°F Low: 35°F  
Rain Rain Rain & Snow Rain & Snow Rain Rain & Snow Rain & Snow Rain and Snow
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Current Conditions at
WALLA WALLA - (KALW)
50°
Mostly Cloudy
as of 6:53 AM PST
Rel. Humidity: 76%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
8 MPH
140° Southeast
Cloud Level(s): Scattered at 6000ft, Broken at 7500ft
Current Conditions at
LEWISTON - (KLWS)
48°
Mostly Clear
as of 6:56 AM PST
Rel. Humidity: 70%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
3 MPH
120° Southeast
Cloud Level(s): Few at 11000ft
Current Conditions at
PULLMAN - (KPUW)
45°
Mostly Cloudy
as of 6:53 AM PST
Rel. Humidity: 87%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
6 MPH
220° Southwest
Cloud Level(s): Few at 4900ft, Broken at 6000ft
30% chance of rain Today Today... A 30 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 58. Southwest wind 17 to 21 mph, with gusts as high as 28 mph.
100% chance of rain Tonight Tonight... Rain, mainly after 7pm. Low around 37. Windy, with a south wind 21 to 26 mph increasing to 28 to 33 mph after midnight. Winds could gust as high as 47 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
70% chance of rain & snow Wednesday Wednesday... Rain likely, mainly before 10am. Snow level 2600 feet. Partly sunny, with a high near 48. Windy, with a southwest wind 32 to 36 mph, with gusts as high as 44 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
60% chance of rain & snow Wednesday Night Wednesday Night... Rain likely, mainly after 4am. Snow level 2500 feet. Mostly cloudy, with a low around 35. South wind 11 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
100% chance of rain & snow Thursday Thursday... Rain. Snow level 2700 feet rising to 5200 feet in the afternoon. High near 53. South wind 10 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
90% chance of rain Thursday Night Thursday Night... Rain. Low around 38. Breezy. Chance of precipitation is 90%.
80% chance of rain Friday Friday... Rain, mainly before 4pm. High near 45. Chance of precipitation is 80%.
50% chance of rain & snow Friday Night Friday Night... A chance of rain and snow, mainly before 10pm. Snow level 2400 feet. Mostly cloudy, with a low around 33. Chance of precipitation is 50%.
40% chance of rain & snow Saturday Saturday... A chance of rain and snow before 1pm, then a chance of rain. Snow level 2300 feet. Partly sunny, with a high near 43. Chance of precipitation is 40%.
20% chance of rain & snow Saturday Night Saturday Night... A chance of rain before 7pm, then a chance of rain and snow. Snow level 2500 feet. Mostly cloudy, with a low around 31.
20% chance of rain & snow Sunday Sunday... A chance of rain and snow. Partly sunny, with a high near 46.
70% chance of rain Sunday Night Sunday Night... Rain likely. Mostly cloudy, with a low around 35.
Rain and Snow on Monday Monday... Rain and snow likely. Mostly cloudy, with a high near 49.
Sun Almanac for Dayton, Washington
Sunrise: 07:29 AM
Sunset: 4:06 PM
Civil Sunrise:06:55 AM
Civil Sunset: 4:41 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:19 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 5:56 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.