Avalon Weather in September
Average highs run from 80°F on September 1 to 75°F on September 30, and lows from 64°F to 60°F. Normal precipitation for the month is 0.12 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
- 78°F
- Average low
- 63°F
- Precipitation
- 0.12 in
- Record high
- 110°FSep 6, 2020
- Record low
- 48°FSep 25, 1948
- Chance of a freeze
- 0%
- Days of 90°F or more
- 4.5
- Daylight
- 12 h 50 min to 11 h 52 min
- Cloud cover
- 48%
- Humidity
- 87%
- Dew point
- 62°F
- Wind
- 8.3 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 | 80°F | 64°F | 105°F 2022 | 54°F 1950 | 4% |
| Sep 2 | 80°F | 64°F | 101°F 2017 | 52°F 1951 | 4% |
| Sep 3 | 80°F | 64°F | 98°F 1948 | 53°F 1951 | 4% |
| Sep 4 | 80°F | 64°F | 100°F 2022 | 54°F 1949 | 4% |
| Sep 5 | 80°F | 64°F | 102°F 2020 | 53°F 1963 | 4% |
| Sep 6 | 80°F | 64°F | 110°F 2020 | 50°F 1948 | 5% |
| Sep 7 | 80°F | 64°F | 98°F 1949 | 50°F 1948 | 5% |
| Sep 8 | 80°F | 64°F | 98°F 2024 | 54°F 1950 | 5% |
| Sep 9 | 80°F | 64°F | 97°F 2024 | 52°F 2000 | 5% |
| Sep 10 | 80°F | 64°F | 97°F 1948 | 51°F 1952 | 5% |
| Sep 11 | 79°F | 64°F | 102°F 1948 | 51°F 1952 | 5% |
| Sep 12 | 79°F | 64°F | 98°F 1963 | 53°F 1952 | 6% |
| Sep 13 | 79°F | 63°F | 94°F 1948 | 53°F 1951 | 6% |
| Sep 14 | 79°F | 63°F | 98°F 1948 | 53°F 1950 | 6% |
| Sep 15 | 79°F | 63°F | 98°F 2012 | 51°F 2010 | 6% |
| Sep 16 | 79°F | 63°F | 96°F 2014 | 54°F 1950 | 7% |
| Sep 17 | 78°F | 63°F | 92°F 1951 | 53°F 1950 | 7% |
| Sep 18 | 78°F | 63°F | 93°F 2020 | 53°F 1950 | 7% |
| Sep 19 | 78°F | 63°F | 96°F 2016 | 52°F 1950 | 7% |
| Sep 20 | 78°F | 62°F | 94°F 2015 | 52°F 2007 | 8% |
| Sep 21 | 78°F | 62°F | 97°F 2003 | 51°F 2010 | 8% |
| Sep 22 | 77°F | 62°F | 98°F 2009 | 51°F 2010 | 8% |
| Sep 23 | 77°F | 62°F | 99°F 1949 | 52°F 2007 | 9% |
| Sep 24 | 77°F | 62°F | 96°F 2009 | 52°F 1948 | 9% |
| Sep 25 | 77°F | 61°F | 100°F 1963 | 48°F 1948 | 9% |
| Sep 26 | 76°F | 61°F | 101°F 1963 | 52°F 1948 | 9% |
| Sep 27 | 76°F | 61°F | 104°F 2010 | 51°F 2024 | 10% |
| Sep 28 | 76°F | 61°F | 100°F 1963 | 49°F 2024 | 10% |
| Sep 29 | 76°F | 61°F | 97°F 1963 | 51°F 2024 | 11% |
| Sep 30 | 75°F | 60°F | 101°F 2020 | 52°F 1950 | 11% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:28 AM, sunset 7:18 PM
- September 30
- sunrise 6:47 AM, sunset 6:39 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00023191 (Avalon Catalina AP), public domain. Records: NOAA GHCN-Daily, station USW00023191, 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.