Lassen County weather, town by town
16 places in Lassen County, California, 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.
Lassen County Weather Facts
Lassen County has 16 places on myweatherrock (15 census-designated places, 1 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 113°F at Hat Creek on July 24, 1928. The coldest night is -33°F at Jess Valley on January 22, 1962. The wettest day brought 6 inches of rain at Chester on February 20, 2024. The biggest single-day snow measured 47.99 inches at Chester on January 29, 1968. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Janesville, about 34 square miles.
About Lassen County weather
The map on the Now tab shows every Lassen 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 14 Lassen County towns with station normals, the warmest month is July, when the day usually reaches 88°F, and the coldest is January, when the night usually falls to 22°F. December is the wettest, with rain on about 9 days. July afternoons run from about 77°F in Bieber to 92°F in Little Valley. January nights run from about 19°F in Bieber to 22°F in Clear Creek.
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.
Lassen 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 Lassen County weather
- What is the hottest temperature recorded at a Lassen County station?
- 113°F at Hat Creek on July 24, 1928, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Lassen County station?
- -33°F at Jess Valley on January 22, 1962.
- What is the most rain a Lassen County station has measured in one day?
- 6 inches at Chester on February 20, 2024.
- What is the biggest one-day snowfall at a Lassen County station?
- 47.99 inches at Chester on January 29, 1968.
- How many Lassen County towns have a weather page here?
- 16: 15 census-designated places, 1 cities. 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 Lassen 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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