Monterey County (Monterey)
September
Weather in Monterey County, California for September 2026
Your guide to Monterey County weather in September - trends and predictions
In general, the average temperature in Monterey County at the beginning of September is 19.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 17.4 °F by the end of September.
With an average of 3 rainy days, Monterey County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
18°/12°
Temperatures
14 km/h
Avg max wind
80 %
Avg humidity
Monterey County Weather September
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Temperatures trend during September in Monterey County
See the weather trend as well as the moving average line
September weather in Monterey County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 18° /12° | 0 mm | 5 | |
| Sept. 2 | Sunny | 18° /11° | 0 mm | 5 | |
| Sept. 3 | Sunny | 20° /12° | 0 mm | 5 | |
| Sept. 4 | Sunny | 19° /13° | 0 mm | 5 | |
| Sept. 5 | Sunny | 20° /13° | 0 mm | 5 | |
| Sept. 6 |  Overcast | 19° /13° | 0 mm | 5 | |
| Sept. 7 | Sunny | 20° /14° | 0 mm | 5 | |
| Sept. 8 | Sunny | 19° /13° | 0 mm | 5 | |
| Sept. 9 | Sunny | 19° /13° | 0 mm | 5 | |
| Sept. 10 | Sunny | 17° /13° | 0 mm | 5 | |
| Sept. 11 | Sunny | 17° /13° | 0 mm | 5 | |
| Sept. 12 |  Patchy rain possible | 18° /13° | 0.1 mm | 4 | |
| Sept. 13 | Sunny | 18° /12° | 0 mm | 5 | |
| Sept. 14 |  Cloudy | 17° /12° | 0 mm | 4 | |
| Sept. 15 | Patchy rain possible | 18° /12° | 0.8 mm | 4 | |
| Sept. 16 |  Moderate rain at times | 17° /13° | 1.6 mm | 5 | |
| Sept. 17 | Overcast | 17° /13° | 0 mm | 5 | |
| Sept. 18 | Patchy rain possible | 17° /13° | 23.9 mm | 4 | |
| Sept. 19 | Overcast | 17° /13° | 0 mm | 4 | |
| Sept. 20 | Overcast | 16° /12° | 0 mm | 4 | |
| Sept. 21 | Cloudy | 17° /12° | 0 mm | 4 | |
| Sept. 22 | Cloudy | 19° /12° | 0 mm | 5 | |
| Sept. 23 |  Partly cloudy | 20° /14° | 0 mm | 6 | |
| Sept. 24 | Cloudy | 19° /14° | 2 mm | 4 | |
| Sept. 25 | Patchy rain possible | 16° /13° | 0.1 mm | 4 | |
| Sept. 26 | Cloudy | 17° /12° | 0 mm | 4 | |
| Sept. 27 | Partly cloudy | 19° /13° | 0 mm | 5 | |
| Sept. 28 | Cloudy | 17° /13° | 0 mm | 4 | |
| Sept. 29 | Cloudy | 16° /12° | 0 mm | 4 | |
| Sept. 30 | Partly cloudy | 18° /13° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Monterey 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 Monterey County forecast closer to your planned date for the most up-to-date weather information.
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Monterey County in September - FAQ
What are the expected maximum and minimum temperatures in Monterey County during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Monterey County during September?
Rainfall in Monterey County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 3 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 Monterey County during September?
The average wind speed in Monterey County during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Monterey County
Explore the daily rainfall trends and prepare for Monterey Countys September weather 💧
Typically, Monterey County has 3 rainy days in September with a total of 5.3 mm of rainfall.
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Where is Monterey County?Get accurate weather forecasts for Monterey County, located at latitude 36.6 and longitude -121.895. Stay updated with localized weather information tailored for Monterey County.
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