Monterey County (Salinas)
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 21.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 19.7 °F by the end of September.
With an average of 3 rainy days, Monterey County experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
21°/11°
Temperatures
15 km/h
Avg max wind
79 %
Avg humidity
Monterey County Weather September
Move between months or click on a day
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
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 21° /12° | 0 mm | 5 | |
| Sept. 2 | Mist | 20° /11° | 0 mm | 5 | |
| Sept. 3 |  Overcast | 22° /11° | 0 mm | 5 | |
| Sept. 4 | Mist | 22° /12° | 0 mm | 5 | |
| Sept. 5 | Mist | 22° /13° | 0 mm | 5 | |
| Sept. 6 | Mist | 21° /12° | 0 mm | 5 | |
| Sept. 7 | Mist | 22° /12° | 0 mm | 5 | |
| Sept. 8 | Mist | 22° /11° | 0 mm | 5 | |
| Sept. 9 |  Partly cloudy | 23° /12° | 0 mm | 6 | |
| Sept. 10 | Mist | 20° /11° | 0 mm | 5 | |
| Sept. 11 | Overcast | 20° /11° | 0 mm | 5 | |
| Sept. 12 |  Light rain | 20° /12° | 0.7 mm | 4 | |
| Sept. 13 | Mist | 20° /11° | 0 mm | 5 | |
| Sept. 14 |  Cloudy | 20° /11° | 0 mm | 5 | |
| Sept. 15 | Mist | 21° /12° | 0 mm | 5 | |
| Sept. 16 | Mist | 20° /12° | 0.6 mm | 5 | |
| Sept. 17 | Mist | 19° /12° | 0 mm | 5 | |
| Sept. 18 | Mist | 18° /12° | 12.8 mm | 4 | |
| Sept. 19 | Mist | 17° /13° | 0 mm | 4 | |
| Sept. 20 | Mist | 18° /12° | 0 mm | 4 | |
| Sept. 21 | Mist | 19° /11° | 0 mm | 4 | |
| Sept. 22 | Overcast | 20° /11° | 0 mm | 5 | |
| Sept. 23 | Partly cloudy | 22° /12° | 0 mm | 6 | |
| Sept. 24 | Overcast | 20° /12° | 0 mm | 5 | |
| Sept. 25 | Mist | 19° /11° | 0 mm | 4 | |
| Sept. 26 | Mist | 20° /11° | 0 mm | 4 | |
| Sept. 27 | Mist | 20° /11° | 0 mm | 5 | |
| Sept. 28 | Overcast | 20° /12° | 0 mm | 5 | |
| Sept. 29 | Mist | 19° /11° | 0 mm | 4 | |
| Sept. 30 |  Light rain shower | 20° /12° | 1.6 mm | 5 | |
| Next | |||||
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.
Change Month
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 21° and cooler nights around 11°. 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 15 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 💧
UV exposure in Monterey County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Monterey County
Select a location for an accurate weather forecast
More Locations Quick links
More Monterey County weather pages
You are here
Where is Monterey County?Get accurate weather forecasts for Monterey County, located at latitude 36.678 and longitude -121.656. Stay updated with localized weather information tailored for Monterey County.
Found a mistake?
We appreciate your attention to details. Tell us here.