San Ardo Weather in September
Average highs run from 95°F on September 1 to 86°F on September 30, and lows from 49°F to 43°F. Normal precipitation for the month is 0.05 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
- 47°F
- Precipitation
- 0.05 in
- Record high
- 117°FSep 6, 2020
- Record low
- 34°FSep 25, 1948
- Chance of a freeze
- 10%
- Days of 90°F or more
- 17.3
- Daylight
- 12 h 55 min to 11 h 50 min
- Cloud cover
- 14%
- Humidity
- 53%
- Dew point
- 47°F
- Wind
- 6.9 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 | 49°F | 112°F 1955 | 42°F 1960 | 1% |
| Sep 2 | 95°F | 49°F | 115°F 2017 | 42°F 1975 | 1% |
| Sep 3 | 94°F | 49°F | 109°F 1955 | 43°F 2004 | 1% |
| Sep 4 | 94°F | 49°F | 111°F 1988 | 44°F 2011 | 1% |
| Sep 5 | 94°F | 49°F | 112°F 2020 | 43°F 1948 | 1% |
| Sep 6 | 94°F | 49°F | 117°F 2020 | 43°F 1948 | 1% |
| Sep 7 | 94°F | 48°F | 112°F 2020 | 42°F 1994 | 2% |
| Sep 8 | 93°F | 48°F | 108°F 2022 | 41°F 1994 | 2% |
| Sep 9 | 93°F | 48°F | 106°F 1948 | 39°F 1964 | 2% |
| Sep 10 | 93°F | 48°F | 107°F 2026 | 42°F 1964 | 2% |
| Sep 11 | 93°F | 48°F | 110°F 1979 | 39°F 1952 | 2% |
| Sep 12 | 92°F | 48°F | 110°F 1979 | 38°F 1972 | 2% |
| Sep 13 | 92°F | 47°F | 108°F 1971 | 40°F 1972 | 2% |
| Sep 14 | 92°F | 47°F | 108°F 1971 | 37°F 1970 | 2% |
| Sep 15 | 91°F | 47°F | 108°F 1971 | 40°F 1970 | 2% |
| Sep 16 | 91°F | 47°F | 106°F 1979 | 41°F 2006 | 2% |
| Sep 17 | 91°F | 47°F | 104°F 1991 | 40°F 1993 | 2% |
| Sep 18 | 90°F | 46°F | 104°F 1991 | 40°F 1955 | 3% |
| Sep 19 | 90°F | 46°F | 107°F 2000 | 40°F 1978 | 3% |
| Sep 20 | 90°F | 46°F | 105°F 2015 | 38°F 2004 | 3% |
| Sep 21 | 89°F | 46°F | 107°F 1949 | 38°F 1968 | 3% |
| Sep 22 | 89°F | 46°F | 107°F 1949 | 39°F 1968 | 3% |
| Sep 23 | 89°F | 45°F | 106°F 1949 | 39°F 2017 | 3% |
| Sep 24 | 88°F | 45°F | 103°F 1991 | 38°F 2005 | 3% |
| Sep 25 | 88°F | 45°F | 105°F 2009 | 34°F 1948 | 4% |
| Sep 26 | 87°F | 45°F | 107°F 2009 | 34°F 1948 | 4% |
| Sep 27 | 87°F | 44°F | 108°F 2010 | 38°F 2013 | 4% |
| Sep 28 | 87°F | 44°F | 107°F 2010 | 39°F 1964 | 4% |
| Sep 29 | 86°F | 44°F | 104°F 2020 | 37°F 2019 | 4% |
| Sep 30 | 86°F | 43°F | 106°F 2020 | 35°F 1950 | 4% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:36 AM, sunset 7:31 PM
- September 30
- sunrise 6:58 AM, sunset 6:48 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047150 (Priest Valley), public domain. Records: NOAA GHCN-Daily, station USW00093209, 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.