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Weather in Modesto for September 2025

Your guide to Modesto weather in September - trends and predictions
  • In general, the average temperature in Modesto at the beginning of September is 35.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 33.1 °F by the end of September.

  • With an average of 2 rainy days, Modesto experiences minimal rainfall in September, ensuring that most days remain pleasantly dry.

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Average dry days
28
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/12°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
52 %
Avg humidity

Modesto in September average weather

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Temperatures trend during September in Modesto

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
Sept. 1 Overcast
Overcast
32° /14° 0 mm 8
Sept. 2 Overcast
Overcast
32° /13° 0 mm 8
Sept. 3 Patchy rain possible
Patchy rain possible
33° /15° 0.2 mm 8
Sept. 4 Cloudy
Cloudy
37° /15° 0 mm 9
Sept. 5 Sunny
Sunny
38° /16° 0 mm 9
Sept. 6 Sunny
Sunny
40° /18° 0 mm 10
Sept. 7 Sunny
Sunny
38° /16° 0 mm 10
Sept. 8 Sunny
Sunny
38° /16° 0 mm 9
Sept. 9 Partly cloudy
Partly cloudy
38° /15° 0 mm 9
Sept. 10 Sunny
Sunny
36° /13° 0 mm 9
Sept. 11 Sunny
Sunny
34° /13° 0 mm 9
Sept. 12 Cloudy
Cloudy
32° /12° 0 mm 8
Sept. 13 Sunny
Sunny
34° /13° 0 mm 8
Sept. 14 Sunny
Sunny
36° /16° 0 mm 9
Sept. 15 Sunny
Sunny
33° /14° 0 mm 8
Sept. 16 Sunny
Sunny
28° /12° 0.1 mm 7
Sept. 17 Overcast
Overcast
28° /11° 0 mm 6
Sept. 18 Cloudy
Cloudy
27° /11° 0 mm 6
Sept. 19 Mist
Mist
31° /12° 0 mm 7
Sept. 20 Sunny
Sunny
32° /12° 0 mm 8
Sept. 21 Partly cloudy
Partly cloudy
32° /11° 0 mm 8
Sept. 22 Partly cloudy
Partly cloudy
33° /11° 0 mm 8
Sept. 23 Overcast
Overcast
34° /13° 0 mm 8
Sept. 24 Mist
Mist
36° /13° 0 mm 8
Sept. 25 Mist
Mist
33° /13° 0 mm 8
Sept. 26 Partly cloudy
Partly cloudy
32° /11° 0 mm 8
Sept. 27 Partly cloudy
Partly cloudy
35° /12° 0 mm 9
Sept. 28 Partly cloudy
Partly cloudy
34° /13° 0 mm 9
Sept. 29 Cloudy
Cloudy
34° /12° 0 mm 8
Sept. 30 Light rain shower
Light rain shower
28° /13° 2.5 mm 7
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Important Notice
Our weather forecast for Modesto 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 Modesto forecast closer to your planned date for the most up-to-date weather information.

Modesto in September - FAQ

What are the expected maximum and minimum temperatures in Modesto during September?
Expect warm days with temperatures around 32°, cooling to mild conditions of 12° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Modesto during September?
Rainfall in Modesto during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 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 Modesto during September?
The average wind speed in Modesto during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Modesto

Explore the daily rainfall trends and prepare for Modestos September weather 💧

UV exposure in Modesto during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Modesto?

Get accurate weather forecasts for Modesto, located at latitude 37.639 and longitude -120.997. Stay updated with localized weather information tailored for Modesto.

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