Carson Weather in September
Average highs run from 78°F on September 1 to 69°F on September 30, and lows from 55°F to 51°F. Normal precipitation for the month is 2.62 in over about 8 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
- 74°F
- Average low
- 53°F
- Precipitation
- 2.62 in
- Record high
- 101°FSep 4, 2020
- Record low
- 24°FSep 25, 1926
- Chance of a freeze
- 0%
- Days of 90°F or more
- 1.4
- Daylight
- 13 h 16 min to 11 h 44 min
- Cloud cover
- 41%
- Humidity
- 71%
- Dew point
- 47°F
- Wind
- 4.0 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 | 78°F | 55°F | 100°F 1998 | 37°F 1973 | 19% | 0% |
| Sep 2 | 78°F | 55°F | 98°F 2017 | 36°F 1919 | 20% | 0% |
| Sep 3 | 77°F | 55°F | 98°F 1988 | 38°F 1932 | 20% | 0% |
| Sep 4 | 77°F | 55°F | 101°F 2020 | 38°F 1956 | 21% | 0% |
| Sep 5 | 77°F | 55°F | 96°F 2003 | 38°F 1921 | 21% | 0% |
| Sep 6 | 77°F | 55°F | 96°F 2024 | 36°F 1895 | 22% | 0% |
| Sep 7 | 77°F | 55°F | 94°F 1924 | 35°F 1929 | 22% | 0% |
| Sep 8 | 76°F | 54°F | 95°F 2003 | 36°F 1960 | 23% | 0% |
| Sep 9 | 76°F | 54°F | 96°F 1963 | 34°F 1962 | 23% | 0% |
| Sep 10 | 76°F | 54°F | 96°F 1944 | 35°F 1907 | 24% | 0% |
| Sep 11 | 76°F | 54°F | 96°F 2024 | 30°F 1921 | 24% | 0% |
| Sep 12 | 76°F | 54°F | 94°F 2011 | 30°F 1921 | 25% | 0% |
| Sep 13 | 75°F | 54°F | 93°F 2009 | 29°F 1921 | 25% | 0% |
| Sep 14 | 75°F | 53°F | 95°F 1938 | 30°F 1921 | 26% | 0% |
| Sep 15 | 75°F | 53°F | 95°F 1938 | 32°F 1921 | 27% | 0% |
| Sep 16 | 74°F | 53°F | 94°F 2002 | 32°F 1936 | 27% | 0% |
| Sep 17 | 74°F | 53°F | 98°F 1938 | 27°F 1965 | 28% | 0% |
| Sep 18 | 74°F | 53°F | 91°F 1952 | 29°F 1965 | 28% | 0% |
| Sep 19 | 74°F | 53°F | 90°F 1952 | 32°F 1965 | 29% | 0% |
| Sep 20 | 73°F | 52°F | 90°F 1999 | 29°F 1926 | 30% | 0% |
| Sep 21 | 73°F | 52°F | 94°F 1939 | 29°F 1895 | 30% | 0% |
| Sep 22 | 73°F | 52°F | 92°F 2014 | 32°F 1993 | 31% | 0% |
| Sep 23 | 72°F | 52°F | 90°F 1966 | 26°F 1908 | 31% | 0% |
| Sep 24 | 72°F | 52°F | 90°F 1942 | 28°F 2000 | 32% | 0% |
| Sep 25 | 71°F | 52°F | 90°F 1994 | 24°F 1926 | 33% | 0% |
| Sep 26 | 71°F | 51°F | 89°F 1991 | 26°F 1926 | 33% | 0% |
| Sep 27 | 71°F | 51°F | 88°F 2003 | 29°F 1972 | 34% | 0% |
| Sep 28 | 70°F | 51°F | 91°F 1994 | 27°F 1999 | 34% | 0% |
| Sep 29 | 70°F | 51°F | 91°F 2003 | 26°F 1985 | 35% | 0% |
| Sep 30 | 69°F | 51°F | 90°F 1993 | 28°F 1985 | 36% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:29 AM, sunset 7:45 PM
- September 30
- sunrise 7:05 AM, sunset 6:49 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00350897 (Bonneville Dam), public domain. Records: NOAA GHCN-Daily, station USC00354003, 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.