Hollister (CA)
September
Weather in Hollister, California for September 2026
Your guide to Hollister weather in September - trends and predictions
In general, the average temperature in Hollister at the beginning of September is 31.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.7 °F by the end of September.
Precipitation in Hollister during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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29
Dry days
1
Rainy days
0
Snow days
28°/12°
Temperatures
12 km/h
Avg max wind
58 %
Avg humidity
Hollister Weather September
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Temperatures trend during September in Hollister
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September weather in Hollister day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 32° /13° | 0 mm | 8 | |
| Sept. 2 | Sunny | 28° /10° | 0 mm | 7 | |
| Sept. 3 | Sunny | 34° /11° | 0 mm | 9 | |
| Sept. 4 | Sunny | 31° /13° | 0 mm | 8 | |
| Sept. 5 | Sunny | 32° /13° | 0 mm | 8 | |
| Sept. 6 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 7 | Sunny | 31° /14° | 0 mm | 7 | |
| Sept. 8 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 9 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 10 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 11 | Sunny | 21° /11° | 0 mm | 6 | |
| Sept. 12 |  Cloudy | 26° /11° | 0 mm | 6 | |
| Sept. 13 | Sunny | 25° /10° | 0 mm | 6 | |
| Sept. 14 | Sunny | 27° /10° | 0 mm | 7 | |
| Sept. 15 |  Patchy rain possible | 28° /11° | 0.1 mm | 6 | |
| Sept. 16 | Patchy rain possible | 26° /13° | 0.2 mm | 7 | |
| Sept. 17 |  Overcast | 27° /13° | 0 mm | 7 | |
| Sept. 18 |  Moderate rain at times | 18° /11° | 7.9 mm | 4 | |
| Sept. 19 | Overcast | 25° /12° | 0 mm | 6 | |
| Sept. 20 | Overcast | 25° /11° | 0 mm | 6 | |
| Sept. 21 | Cloudy | 27° /11° | 0 mm | 6 | |
| Sept. 22 | Sunny | 30° /10° | 0 mm | 7 | |
| Sept. 23 | Sunny | 37° /15° | 0 mm | 9 | |
| Sept. 24 | Sunny | 27° /14° | 1.8 mm | 7 | |
| Sept. 25 |  Partly cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 26 | Partly cloudy | 28° /12° | 0 mm | 7 | |
| Sept. 27 | Sunny | 29° /13° | 0 mm | 8 | |
| Sept. 28 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 29 | Partly cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 30 | Sunny | 29° /11° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Hollister 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 Hollister forecast closer to your planned date for the most up-to-date weather information.
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Hollister in September - FAQ
What are the expected maximum and minimum temperatures in Hollister during September?
Enjoy moderate daytime temperatures of up to 28° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Hollister during September?
Rainfall in Hollister during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 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 Hollister during September?
The average wind speed in Hollister during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Hollister
Explore the daily rainfall trends and prepare for Hollisters September weather 💧
UV exposure in Hollister during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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