Buellton Weather in September
Average highs run from 93°F on September 1 to 88°F on September 30, and lows from 48°F to 45°F. Normal precipitation for the month is 0.08 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
- 0.08 in
- Record high
- 120°FSep 7, 2020
- Record low
- 33°FSep 3, 2026
- Chance of a freeze
- 3%
- Days of 90°F or more
- 16.1
- Daylight
- 12 h 53 min to 11 h 51 min
- Cloud cover
- 24%
- Humidity
- 55%
- Dew point
- 51°F
- Wind
- 7.6 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 | 93°F | 48°F | 109°F 2017 | 41°F 1969 | 1% |
| Sep 2 | 93°F | 48°F | 111°F 2017 | 43°F 2016 | 2% |
| Sep 3 | 93°F | 48°F | 114°F 2017 | 33°F 2026 | 2% |
| Sep 4 | 93°F | 48°F | 113°F 2022 | 44°F 1954 | 2% |
| Sep 5 | 92°F | 48°F | 112°F 2022 | 41°F 1954 | 2% |
| Sep 6 | 92°F | 48°F | 114°F 2020 | 42°F 1954 | 2% |
| Sep 7 | 92°F | 48°F | 120°F 2020 | 38°F 1954 | 2% |
| Sep 8 | 92°F | 48°F | 111°F 2020 | 35°F 1954 | 2% |
| Sep 9 | 92°F | 47°F | 108°F 2022 | 40°F 1954 | 2% |
| Sep 10 | 92°F | 47°F | 109°F 2026 | 39°F 2014 | 2% |
| Sep 11 | 92°F | 47°F | 106°F 1979 | 40°F 1954 | 2% |
| Sep 12 | 91°F | 47°F | 105°F 2015 | 39°F 1954 | 2% |
| Sep 13 | 91°F | 47°F | 109°F 1971 | 38°F 1955 | 3% |
| Sep 14 | 91°F | 47°F | 115°F 1971 | 39°F 1955 | 3% |
| Sep 15 | 91°F | 47°F | 106°F 1971 | 40°F 1970 | 3% |
| Sep 16 | 91°F | 47°F | 106°F 1979 | 34°F 1954 | 3% |
| Sep 17 | 91°F | 47°F | 104°F 1979 | 36°F 1954 | 3% |
| Sep 18 | 90°F | 47°F | 104°F 2000 | 35°F 1954 | 3% |
| Sep 19 | 90°F | 46°F | 107°F 2016 | 37°F 1954 | 3% |
| Sep 20 | 90°F | 46°F | 104°F 2016 | 34°F 1954 | 3% |
| Sep 21 | 90°F | 46°F | 105°F 2015 | 34°F 1954 | 3% |
| Sep 22 | 90°F | 46°F | 108°F 2003 | 40°F 1954 | 4% |
| Sep 23 | 89°F | 46°F | 109°F 2003 | 34°F 1954 | 4% |
| Sep 24 | 89°F | 46°F | 107°F 2002 | 37°F 2017 | 4% |
| Sep 25 | 89°F | 46°F | 106°F 2015 | 38°F 1954 | 4% |
| Sep 26 | 89°F | 46°F | 106°F 2010 | 37°F 2013 | 4% |
| Sep 27 | 89°F | 45°F | 108°F 2010 | 35°F 2013 | 4% |
| Sep 28 | 88°F | 45°F | 110°F 2010 | 40°F 1971 | 4% |
| Sep 29 | 88°F | 45°F | 107°F 1963 | 40°F 1954 | 5% |
| Sep 30 | 88°F | 45°F | 104°F 1980 | 38°F 1954 | 5% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:34 AM, sunset 7:27 PM
- September 30
- sunrise 6:55 AM, sunset 6:46 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00041253 (Cachuma Lake), public domain. Records: NOAA GHCN-Daily, station USC00041253, 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.