Columbia County weather, town by town
2 places in Columbia County, Washington, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Columbia County Weather Facts
Columbia County has 2 places on myweatherrock (1 cities, 1 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 114°F at Dayton 1 Wsw on August 5, 1961. The coldest night is -25°F at Dayton 1 Wsw on December 30, 1968. The wettest day brought 2.18 inches of rain at Dayton 1 Wsw on November 1, 1994. The biggest single-day snow measured 17.52 inches at Dayton 1 Wsw on December 25, 1996. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Dayton, about 1 square miles.
About Columbia County weather
The map on the Now tab shows every Columbia County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 2 Columbia County towns with station normals, the warmest month is July, when the day usually reaches 87°F, and the coldest is January, when the night usually falls to 27°F. January is the wettest, with rain on about 14 days.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Columbia County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about Columbia County weather
- What is the hottest temperature recorded at a Columbia County station?
- 114°F at Dayton 1 Wsw on August 5, 1961, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Columbia County station?
- -25°F at Dayton 1 Wsw on December 30, 1968.
- What is the most rain a Columbia County station has measured in one day?
- 2.18 inches at Dayton 1 Wsw on November 1, 1994.
- What is the biggest one-day snowfall at a Columbia County station?
- 17.52 inches at Dayton 1 Wsw on December 25, 1996.
- How many Columbia County towns have a weather page here?
- 2: 1 cities, 1 towns. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Columbia County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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