Isla Vista Weather in September
Average highs run from 71°F on September 1 to 72°F on September 30, and lows from 57°F to 55°F. Normal precipitation for the month is 0.09 in.
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
- 71°F
- Average low
- 56°F
- Precipitation
- 0.09 in
- Record high
- 104°FSep 18, 1979
- Record low
- 42°FSep 23, 1941
- Chance of a freeze
- 0%
- Daylight
- 12 h 52 min to 11 h 52 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 | 71°F | 57°F | 99°F 1955 | 48°F 1941 | |
| Sep 2 | 71°F | 57°F | 97°F 1955 | 47°F 1942 | |
| Sep 3 | 71°F | 57°F | 100°F 1982 | 46°F 1942 | |
| Sep 4 | 71°F | 57°F | 102°F 1988 | 50°F 2005 | |
| Sep 5 | 71°F | 57°F | 95°F 2004 | 49°F 1970 | |
| Sep 6 | 71°F | 57°F | 97°F 1955 | 46°F 1973 | |
| Sep 7 | 71°F | 57°F | 93°F 1955 | 47°F 1989 | |
| Sep 8 | 71°F | 57°F | 92°F 1984 | 46°F 1946 | |
| Sep 9 | 71°F | 57°F | 96°F 2026 | 47°F 1953 | |
| Sep 10 | 71°F | 57°F | 94°F 1956 | 45°F 1943 | |
| Sep 11 | 71°F | 57°F | 89°F 1959 | 45°F 1946 | |
| Sep 12 | 71°F | 57°F | 90°F 2015 | 47°F 1985 | |
| Sep 13 | 71°F | 57°F | 93°F 1963 | 47°F 1956 | |
| Sep 14 | 71°F | 57°F | 87°F 2014 | 46°F 1952 | |
| Sep 15 | 71°F | 57°F | 93°F 1979 | 45°F 1970 | |
| Sep 16 | 71°F | 57°F | 99°F 2014 | 46°F 2006 | |
| Sep 17 | 71°F | 57°F | 88°F 1979 | 47°F 1946 | |
| Sep 18 | 71°F | 57°F | 104°F 1979 | 45°F 1947 | |
| Sep 19 | 71°F | 57°F | 95°F 1984 | 45°F 1947 | |
| Sep 20 | 71°F | 56°F | 95°F 1984 | 44°F 2007 | |
| Sep 21 | 71°F | 56°F | 86°F 2015 | 44°F 1944 | |
| Sep 22 | 71°F | 56°F | 91°F 1987 | 44°F 1944 | |
| Sep 23 | 71°F | 56°F | 97°F 1944 | 42°F 1941 | |
| Sep 24 | 71°F | 56°F | 100°F 1978 | 46°F 2005 | |
| Sep 25 | 71°F | 56°F | 98°F 1978 | 47°F 1941 | |
| Sep 26 | 71°F | 56°F | 103°F 1963 | 43°F 1948 | |
| Sep 27 | 72°F | 55°F | 100°F 2010 | 43°F 2005 | |
| Sep 28 | 72°F | 55°F | 93°F 1963 | 45°F 1988 | |
| Sep 29 | 72°F | 55°F | 98°F 2005 | 44°F 1955 | |
| Sep 30 | 72°F | 55°F | 90°F 1980 | 42°F 1950 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:33 AM, sunset 7:25 PM
- September 30
- sunrise 6:53 AM, sunset 6:45 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00053152 (Santa Barbara 11 W), public domain. Records: NOAA GHCN-Daily, station USW00023190, 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.