Shasta Weather in September
Average highs run from 96°F on September 1 to 87°F on September 30, and lows from 63°F to 57°F. Normal precipitation for the month is 0.46 in over about 2 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
- 61°F
- Precipitation
- 0.46 in
- Record high
- 116°FSep 3, 1988
- Record low
- 40°FSep 27, 1986
- Chance of a freeze
- 0%
- Days of 90°F or more
- 18.6
- Daylight
- 13 h 05 min to 11 h 47 min
- Cloud cover
- 21%
- Humidity
- 31%
- Dew point
- 36°F
- Wind
- 4.5 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 | 96°F | 63°F | 112°F 2017 | 54°F 2012 | 5% | 0% |
| Sep 2 | 96°F | 63°F | 114°F 2017 | 50°F 1999 | 5% | 0% |
| Sep 3 | 95°F | 63°F | 116°F 1988 | 52°F 1989 | 5% | 0% |
| Sep 4 | 95°F | 63°F | 115°F 1988 | 49°F 2026 | 6% | 0% |
| Sep 5 | 95°F | 63°F | 114°F 1988 | 50°F 2000 | 6% | 0% |
| Sep 6 | 95°F | 63°F | 115°F 2022 | 50°F 2002 | 6% | 0% |
| Sep 7 | 95°F | 63°F | 112°F 2020 | 50°F 2002 | 6% | 0% |
| Sep 8 | 94°F | 62°F | 112°F 2022 | 50°F 2002 | 6% | 0% |
| Sep 9 | 94°F | 62°F | 112°F 2022 | 52°F 1986 | 6% | 0% |
| Sep 10 | 94°F | 62°F | 109°F 2015 | 50°F 1994 | 7% | 0% |
| Sep 11 | 94°F | 62°F | 106°F 2015 | 50°F 2005 | 7% | 0% |
| Sep 12 | 93°F | 62°F | 103°F 2006 | 49°F 2005 | 7% | 0% |
| Sep 13 | 93°F | 62°F | 102°F 1998 | 51°F 1989 | 7% | 0% |
| Sep 14 | 93°F | 61°F | 106°F 2021 | 50°F 1988 | 7% | 0% |
| Sep 15 | 93°F | 61°F | 102°F 1991 | 48°F 1992 | 7% | 0% |
| Sep 16 | 92°F | 61°F | 102°F 1991 | 47°F 2006 | 8% | 0% |
| Sep 17 | 92°F | 61°F | 109°F 1991 | 47°F 2018 | 8% | 0% |
| Sep 18 | 92°F | 61°F | 104°F 2000 | 48°F 1986 | 8% | 0% |
| Sep 19 | 91°F | 60°F | 106°F 1994 | 46°F 1986 | 8% | 0% |
| Sep 20 | 91°F | 60°F | 105°F 1994 | 49°F 1986 | 8% | 0% |
| Sep 21 | 91°F | 60°F | 108°F 1987 | 46°F 2017 | 8% | 0% |
| Sep 22 | 90°F | 60°F | 105°F 2003 | 49°F 1988 | 9% | 0% |
| Sep 23 | 90°F | 59°F | 105°F 2003 | 47°F 1986 | 9% | 0% |
| Sep 24 | 89°F | 59°F | 107°F 2003 | 44°F 2000 | 9% | 0% |
| Sep 25 | 89°F | 59°F | 104°F 2016 | 43°F 2007 | 9% | 0% |
| Sep 26 | 88°F | 59°F | 111°F 2009 | 43°F 1986 | 9% | 0% |
| Sep 27 | 88°F | 58°F | 102°F 2024 | 40°F 1986 | 10% | 0% |
| Sep 28 | 87°F | 58°F | 103°F 2010 | 46°F 1986 | 10% | 0% |
| Sep 29 | 87°F | 58°F | 106°F 2010 | 41°F 2019 | 10% | 0% |
| Sep 30 | 87°F | 57°F | 104°F 1987 | 40°F 2007 | 10% | 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 7:42 PM
- September 30
- sunrise 7:06 AM, sunset 6:53 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00049621 (Whiskeytown Rsvr), public domain. Records: NOAA GHCN-Daily, station USW00024257, 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.