Red Bluff Weather in September
Average highs run from 95°F on September 1 to 87°F on September 30, and lows from 62°F to 56°F. Normal precipitation for the month is 0.19 in over about 1 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 91°F
- Average low
- 59°F
- Precipitation
- 0.19 in
- Record high
- 118°FSep 4, 1988
- Record low
- 41°FSep 30, 2007
- Chance of a freeze
- 0%
- Days of 90°F or more
- 18.7
- Daylight
- 13 h 03 min to 11 h 48 min
- Cloud cover
- 24%
- Humidity
- 29%
- Dew point
- 35°F
- Wind
- 7.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 95°F | 62°F | 114°F 1950 | 49°F 1999 | 2% | 0% |
| Sep 2 | 94°F | 62°F | 114°F 2017 | 48°F 1946 | 2% | 0% |
| Sep 3 | 94°F | 61°F | 117°F 1988 | 51°F 1945 | 2% | 0% |
| Sep 4 | 94°F | 61°F | 118°F 1988 | 49°F 1940 | 2% | 0% |
| Sep 5 | 94°F | 61°F | 115°F 1988 | 50°F 1946 | 2% | 0% |
| Sep 6 | 94°F | 61°F | 114°F 2022 | 50°F 1946 | 3% | 0% |
| Sep 7 | 94°F | 61°F | 110°F 2020 | 51°F 1965 | 3% | 0% |
| Sep 8 | 94°F | 61°F | 113°F 2022 | 52°F 1937 | 3% | 0% |
| Sep 9 | 93°F | 61°F | 112°F 1944 | 51°F 1964 | 3% | 0% |
| Sep 10 | 93°F | 60°F | 109°F 1944 | 50°F 1946 | 3% | 0% |
| Sep 11 | 93°F | 60°F | 111°F 1945 | 48°F 1985 | 3% | 0% |
| Sep 12 | 93°F | 60°F | 114°F 1945 | 48°F 2005 | 4% | 0% |
| Sep 13 | 93°F | 60°F | 111°F 1971 | 46°F 1936 | 4% | 0% |
| Sep 14 | 92°F | 60°F | 109°F 1953 | 49°F 1939 | 4% | 0% |
| Sep 15 | 92°F | 60°F | 106°F 1951 | 49°F 1959 | 4% | 0% |
| Sep 16 | 92°F | 59°F | 105°F 1937 | 47°F 1946 | 4% | 0% |
| Sep 17 | 91°F | 59°F | 105°F 1984 | 49°F 1947 | 5% | 0% |
| Sep 18 | 91°F | 59°F | 106°F 2000 | 47°F 1989 | 5% | 0% |
| Sep 19 | 91°F | 59°F | 106°F 2000 | 45°F 1941 | 5% | 0% |
| Sep 20 | 91°F | 59°F | 107°F 1974 | 43°F 1941 | 5% | 0% |
| Sep 21 | 90°F | 59°F | 107°F 1943 | 47°F 2007 | 6% | 0% |
| Sep 22 | 90°F | 58°F | 110°F 1943 | 49°F 1944 | 6% | 0% |
| Sep 23 | 90°F | 58°F | 106°F 1943 | 46°F 1941 | 6% | 0% |
| Sep 24 | 89°F | 58°F | 108°F 2003 | 47°F 2000 | 6% | 0% |
| Sep 25 | 89°F | 58°F | 107°F 1944 | 49°F 2007 | 6% | 0% |
| Sep 26 | 88°F | 57°F | 108°F 2009 | 49°F 1982 | 7% | 0% |
| Sep 27 | 88°F | 57°F | 105°F 1944 | 43°F 1971 | 7% | 0% |
| Sep 28 | 88°F | 57°F | 104°F 2010 | 47°F 1964 | 7% | 0% |
| Sep 29 | 87°F | 57°F | 109°F 1966 | 42°F 2019 | 7% | 0% |
| Sep 30 | 87°F | 56°F | 105°F 1990 | 41°F 2007 | 8% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:37 AM, sunset 7:40 PM
- September 30
- sunrise 7:05 AM, sunset 6:53 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024216 (Red Bluff Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00024216, 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.