Three Rivers Weather in September
Average highs run from 95°F on September 1 to 87°F on September 30, and lows from 62°F to 54°F. Normal precipitation for the month is 0.16 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
- 92°F
- Average low
- 58°F
- Precipitation
- 0.16 in
- Record high
- 110°FSep 3, 1950
- Record low
- 32°FSep 5, 1912
- Chance of a freeze
- 0%
- Days of 90°F or more
- 21.7
- Daylight
- 12 h 56 min to 11 h 50 min
- Cloud cover
- 28%
- Humidity
- 33%
- Dew point
- 30°F
- Wind
- 4.5 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 |
|---|---|---|---|---|---|
| Sep 1 | 95°F | 62°F | 108°F 1934 | 39°F 1912 | 1% |
| Sep 2 | 95°F | 62°F | 109°F 1950 | 41°F 1912 | 2% |
| Sep 3 | 95°F | 61°F | 110°F 1950 | 33°F 1912 | 2% |
| Sep 4 | 95°F | 61°F | 108°F 1955 | 35°F 1912 | 2% |
| Sep 5 | 94°F | 61°F | 108°F 1955 | 32°F 1912 | 2% |
| Sep 6 | 94°F | 61°F | 107°F 1923 | 39°F 1911 | 2% |
| Sep 7 | 94°F | 61°F | 110°F 1904 | 43°F 1901 | 2% |
| Sep 8 | 94°F | 60°F | 107°F 1923 | 42°F 1901 | 2% |
| Sep 9 | 94°F | 60°F | 108°F 1944 | 41°F 1913 | 2% |
| Sep 10 | 93°F | 60°F | 108°F 1944 | 41°F 1913 | 2% |
| Sep 11 | 93°F | 60°F | 106°F 1922 | 45°F 1928 | 2% |
| Sep 12 | 93°F | 59°F | 107°F 1953 | 40°F 1912 | 2% |
| Sep 13 | 93°F | 59°F | 108°F 1945 | 41°F 1912 | 2% |
| Sep 14 | 92°F | 59°F | 106°F 1929 | 40°F 1912 | 3% |
| Sep 15 | 92°F | 59°F | 105°F 1938 | 39°F 1912 | 3% |
| Sep 16 | 92°F | 58°F | 107°F 1937 | 44°F 1921 | 3% |
| Sep 17 | 92°F | 58°F | 108°F 1951 | 45°F 1904 | 3% |
| Sep 18 | 91°F | 58°F | 109°F 1913 | 43°F 1911 | 3% |
| Sep 19 | 91°F | 58°F | 107°F 1922 | 44°F 1911 | 3% |
| Sep 20 | 91°F | 57°F | 103°F 1899 | 44°F 1911 | 4% |
| Sep 21 | 90°F | 57°F | 104°F 1928 | 41°F 1986 | 4% |
| Sep 22 | 90°F | 57°F | 106°F 1928 | 45°F 1905 | 4% |
| Sep 23 | 89°F | 56°F | 105°F 1949 | 35°F 1913 | 4% |
| Sep 24 | 89°F | 56°F | 106°F 1949 | 40°F 1913 | 4% |
| Sep 25 | 89°F | 56°F | 104°F 1899 | 38°F 1913 | 4% |
| Sep 26 | 88°F | 55°F | 100°F 1944 | 38°F 1911 | 5% |
| Sep 27 | 88°F | 55°F | 106°F 1963 | 40°F 1911 | 5% |
| Sep 28 | 88°F | 55°F | 103°F 1963 | 39°F 1911 | 5% |
| Sep 29 | 87°F | 55°F | 102°F 1946 | 36°F 1913 | 5% |
| Sep 30 | 87°F | 54°F | 100°F 1899 | 36°F 1913 | 5% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:27 AM, sunset 7:23 PM
- September 30
- sunrise 6:50 AM, sunset 6:40 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00048917 (Three Rivers Edison Ph 1), public domain. Records: NOAA GHCN-Daily, station USC00049367, 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.