Santa Barbara County (Santa Barbara)
September
Weather in Santa Barbara County, California for September 2025
Your guide to Santa Barbara County weather in September - trends and predictions
The forecast for the first days of September 2025 in Santa Barbara County predicts temperatures to be around 28 °F, close to the historical average.
In general, the average temperature in Santa Barbara County at the beginning of September is 27.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.7 °F by the end of September.
Precipitation in Santa Barbara County during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
More
30
Dry days
0
Rainy days
0
Snow days
25°/16°
Temperatures
13 km/h
Avg max wind
58 %
Avg humidity
Santa Barbara County Weather September
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Temperatures trend during September in Santa Barbara County
See the weather trend as well as the moving average line
September weather in Santa Barbara County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 30° /19° | 0 mm | 6 | |
| Sept. 2 | Sunny | 29° /17° | 0 mm | 6 | |
| Sept. 3 | Sunny | 27° /16° | 0 mm | 6 | |
| Sept. 4 | Sunny | 27° /15° | 0 mm | 6 | |
| Sept. 5 | Sunny | 27° /15° | 0 mm | 6 | |
| Sept. 6 | Sunny | 28° /16° | 0 mm | 6 | |
| Sept. 7 | Sunny | 27° /17° | 0 mm | 6 | |
| Sept. 8 | Sunny | 26° /16° | 0 mm | 6 | |
| Sept. 9 | Sunny | 34° /22° | 0 mm | 8 | |
| Sept. 10 |  Overcast | 27° /17° | 0 mm | 6 | |
| Sept. 11 | Overcast | 24° /15° | 0 mm | 5 | |
| Sept. 12 | Sunny | 22° /14° | 0 mm | 6 | |
| Sept. 13 | Overcast | 23° /12° | 0 mm | 5 | |
| Sept. 14 |  Patchy rain possible | 23° /13° | 0.3 mm | 5 | |
| Sept. 15 | Patchy rain possible | 21° /12° | 0.4 mm | 5 | |
| Sept. 16 | Sunny | 21° /12° | 0 mm | 6 | |
| Sept. 17 | Sunny | 22° /13° | 0 mm | 6 | |
| Sept. 18 |  Cloudy | 19° /13° | 0 mm | 4 | |
| Sept. 19 | Patchy rain possible | 19° /14° | 0.4 mm | 4 | |
| Sept. 20 |  Partly cloudy | 20° /14° | 0 mm | 6 | |
| Sept. 21 | Patchy rain possible | 19° /12° | 0.2 mm | 4 | |
| Sept. 22 | Partly cloudy | 22° /13° | 0 mm | 6 | |
| Sept. 23 | Partly cloudy | 25° /15° | 0 mm | 7 | |
| Sept. 24 | Partly cloudy | 22° /15° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 21° /15° | 0.2 mm | 5 | |
| Sept. 26 | Partly cloudy | 21° /14° | 0 mm | 6 | |
| Sept. 27 | Partly cloudy | 22° /14° | 0 mm | 6 | |
| Sept. 28 | Partly cloudy | 21° /14° | 0 mm | 6 | |
| Sept. 29 | Partly cloudy | 21° /15° | 0 mm | 6 | |
| Sept. 30 | Partly cloudy | 24° /18° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Santa Barbara County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Santa Barbara County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Santa Barbara County in September - FAQ
What are the expected maximum and minimum temperatures in Santa Barbara County during September?
During September, expect a variety of temperatures with highs around 25° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Santa Barbara County during September?
Rainfall in Santa Barbara County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Santa Barbara County during September?
The average wind speed in Santa Barbara County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
UV exposure in Santa Barbara County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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