Lassen County Weather in August
Average highs run from 89°F on August 1 to 84°F on August 31, and lows from 54°F to 49°F. Normal precipitation for the month is 0.11 in over about 1 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 87°F
- Average low
- 52°F
- Precipitation
- 0.11 in
- Record high
- 105°FAug 1, 1977
- Record low
- 31°FAug 23, 1960
- Chance of a freeze
- 0%
- Days of 90°F or more
- 10.2
- Daylight
- 14 h 18 min to 13 h 07 min
- Cloud cover
- 21%
- Humidity
- 30%
- Dew point
- 32°F
- Wind
- 5.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 89°F | 54°F | 105°F 1977 | 37°F 1985 | 3% |
| Aug 2 | 88°F | 54°F | 100°F 1931 | 33°F 1944 | 3% |
| Aug 3 | 88°F | 54°F | 101°F 1978 | 33°F 1956 | 3% |
| Aug 4 | 88°F | 54°F | 101°F 1961 | 37°F 1956 | 3% |
| Aug 5 | 88°F | 54°F | 102°F 1932 | 37°F 1951 | 3% |
| Aug 6 | 88°F | 54°F | 101°F 1932 | 34°F 1950 | 3% |
| Aug 7 | 88°F | 54°F | 105°F 1990 | 34°F 1950 | 2% |
| Aug 8 | 88°F | 53°F | 103°F 1990 | 35°F 1944 | 2% |
| Aug 9 | 88°F | 53°F | 104°F 1981 | 33°F 1950 | 2% |
| Aug 10 | 87°F | 53°F | 102°F 1972 | 34°F 1907 | 2% |
| Aug 11 | 87°F | 53°F | 102°F 1929 | 36°F 1993 | 2% |
| Aug 12 | 87°F | 53°F | 102°F 1929 | 34°F 1957 | 2% |
| Aug 13 | 87°F | 53°F | 105°F 1929 | 35°F 1957 | 2% |
| Aug 14 | 87°F | 53°F | 103°F 1933 | 37°F 1978 | 2% |
| Aug 15 | 87°F | 52°F | 104°F 1933 | 33°F 1954 | 2% |
| Aug 16 | 87°F | 52°F | 97°F 1931 | 33°F 1993 | 2% |
| Aug 17 | 87°F | 52°F | 99°F 1966 | 32°F 1976 | 2% |
| Aug 18 | 86°F | 52°F | 99°F 1950 | 35°F 1912 | 2% |
| Aug 19 | 86°F | 52°F | 98°F 1950 | 35°F 1976 | 2% |
| Aug 20 | 86°F | 52°F | 98°F 1934 | 33°F 1993 | 2% |
| Aug 21 | 86°F | 51°F | 98°F 1934 | 32°F 1959 | 2% |
| Aug 22 | 86°F | 51°F | 100°F 1934 | 32°F 1950 | 2% |
| Aug 23 | 86°F | 51°F | 100°F 1934 | 31°F 1960 | 2% |
| Aug 24 | 86°F | 51°F | 100°F 1934 | 32°F 1949 | 2% |
| Aug 25 | 85°F | 51°F | 99°F 1913 | 31°F 1993 | 2% |
| Aug 26 | 85°F | 50°F | 97°F 1913 | 32°F 1993 | 2% |
| Aug 27 | 85°F | 50°F | 98°F 1913 | 32°F 1903 | 2% |
| Aug 28 | 85°F | 50°F | 98°F 1915 | 31°F 1952 | 2% |
| Aug 29 | 85°F | 50°F | 99°F 1915 | 33°F 1994 | 2% |
| Aug 30 | 85°F | 50°F | 98°F 1950 | 32°F 1908 | 2% |
| Aug 31 | 84°F | 49°F | 97°F 1976 | 33°F 1908 | 2% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- August 1
- sunrise 5:59 AM, sunset 8:17 PM
- August 31
- sunrise 6:29 AM, sunset 7:36 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00048702 (Susanville 2SW), public domain. Records: NOAA GHCN-Daily, station USC00048702, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.