Lassen County, CA
An ordinary day in Lassen County, CA: was cooler than 52 of 75 earlier years in the county average (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 67.5°F
- Coldest since 2023
- 23rd coldest of 76
- Low
- 38.7°F
- Coldest since 2023
- 32nd coldest of 76
No measurable precipitation in the county average of Lassen County, CA for 24 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 59.6 to 83.9°F
Every year as a table
Every 29 September low of the county average in Lassen County, CA since 1951: 38.7°F in 2026; the lowest is 27.6°F, in 2007.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 67.5 | 38.7 |
| 2025 | 74.1 | 47.4 |
| 2024 | 84.8 | 46.9 |
| 2023 | 66.9 | 33.6 |
| 2022 | 75.5 | 42.9 |
| 2021 | 54.5 | 30.3 |
| 2020 | 77.1 | 43 |
| 2019 | 47.8 | 29.6 |
| 2018 | 81.5 | 45.7 |
| 2017 | 73.3 | 39.1 |
| 2016 | 83.3 | 46.7 |
| 2015 | 78.3 | 43.8 |
| 2014 | 58.5 | 40.8 |
| 2013 | 64.6 | 38 |
| 2012 | 81.4 | 44.7 |
| 2011 | 83.6 | 43.6 |
| 2010 | 89.6 | 47.5 |
| 2009 | 77.9 | 43.4 |
| 2008 | 83.8 | 44.3 |
| 2007 | 59.6 | 27.6 |
| 2006 | 82.3 | 41.4 |
| 2005 | 76.4 | 37.7 |
| 2004 | 79.1 | 43.4 |
| 2003 | 87.3 | 47.1 |
| 2002 | 67 | 35 |
| 2001 | 68.8 | 37.8 |
| 2000 | 75.2 | 42.4 |
| 1999 | 67.6 | 34.9 |
| 1998 | 67.5 | 36.2 |
| 1997 | 74.4 | 39.6 |
| 1996 | 80.4 | 42.3 |
| 1995 | 59.5 | 34.7 |
| 1994 | 62.4 | 44.9 |
| 1993 | 83.6 | 41.9 |
| 1992 | 84.9 | 43.3 |
| 1991 | 76.7 | 42.5 |
| 1990 | 76.6 | 43 |
| 1989 | 75.2 | 46.9 |
| 1988 | 73.2 | 39 |
| 1987 | 78.7 | 37.6 |
| 1986 | 55.6 | 29.6 |
| 1985 | 67.9 | 31.5 |
| 1984 | 76.4 | 35 |
| 1983 | 65.3 | 38.6 |
| 1982 | 55.4 | 33.2 |
| 1981 | 59 | 35.1 |
| 1980 | 75.3 | 38.9 |
| 1979 | 77.3 | 39.3 |
| 1978 | 77.7 | 37.3 |
| 1977 | 59.8 | 48.1 |
| 1976 | 72.8 | 46.6 |
| 1975 | 78.5 | 38.8 |
| 1974 | 75.7 | 36.3 |
| 1973 | 78.8 | 40.4 |
| 1972 | 64.5 | 35.7 |
| 1971 | 49.6 | 35.5 |
| 1970 | 82.2 | 36.2 |
| 1969 | 76.6 | 43.6 |
| 1968 | 70.7 | 38 |
| 1967 | 82.9 | 49 |
| 1966 | 81.1 | 43.3 |
| 1965 | 59 | 29.7 |
| 1964 | 75.3 | 36.8 |
| 1963 | 84.9 | 44.6 |
| 1962 | 57.7 | 40.9 |
| 1961 | 68.4 | 30.6 |
| 1960 | 78.8 | 42.8 |
| 1959 | 54.1 | 31.8 |
| 1958 | 80.2 | 40.9 |
| 1957 | 65.8 | 43.9 |
| 1956 | 73.3 | 37.4 |
| 1955 | 67.9 | 30.6 |
| 1954 | 65.9 | 31.7 |
| 1953 | 67.7 | 38.7 |
| 1952 | 79.5 | 43.7 |
| 1951 | 65 | 43.1 |
The month
September 2026 so far averaged 56.7°F in Lassen County, CA, the coldest 1 to 29 September in the county average since 2019, 18th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month in words
- August 2026 averaged 69.8°F in Lassen County, CA, the warmest August in the county average since 2017, 2nd warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
- Tuesday 29 September 2026: a high of 67.5°F averaged over Lassen County, CA, the coldest 29 September day in the county average since 2023, tied 23rd coldest of 76 (with 1998) (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 38.7°F averaged over Lassen County, CA, the coldest 29 September night in the county average since 2023, tied 32nd coldest of 76 (with 1953) (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Alturas, CA 53.6 mi, the nearest city with its own station