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Modesto (CA)
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Modesto (CA)
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Weather in Modesto, California for September 2025

Your guide to Modesto weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Flood Watch - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Modesto is slightly cooler than the historical average by -1.7 °F.

  • The forecast for the next days in Modesto predicts a temperature of 29.9 °F, which is cooler than the historical average.

  • In general, the average temperature in Modesto at the beginning of September is 36 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.4 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Modesto during September is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
29
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
33°/14°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
45 %
Avg humidity

Modesto Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
36°
2
Sunny
34°
3
Sunny
35°
4
Sunny
37°
5
Sunny
37°
6
Sunny
37°
7
Sunny
36°
8
Sunny
35°
9
Partly cloudy
35°
10
Sunny
33°
11
Sunny
32°
12
Cloudy
32°
13
Sunny
34°
14
Sunny
35°
15
Sunny
34°
16
Sunny
32°
17
Weather Alert Sunny
41°
18
Overcast
33°
19
Heavy rain
31°
20
Sunny
33°
21
Sunny
36°
22
Sunny
37°
23
Partly cloudy
22°
24
Sunny
28°
25
Sunny
29°
26
Patchy rain possible
24°
27
Patchy rain possible
24°
28
Sunny
25°
29
Sunny
27°
30
Sunny
28°

Temperatures trend during September in Modesto

See the weather trend as well as the moving average line

September weather in Modesto day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 36° /15° 0 mm 8
Sept. 2 Sunny
Sunny
 34° /14° 0 mm 8
Sept. 3 Sunny
Sunny
 35° /15° 0.1 mm 8
Sept. 4 Sunny
Sunny
 37° /15° 0 mm 9
Sept. 5 Sunny
Sunny
 37° /15° 0 mm 8
Sept. 6 Sunny
Sunny
 37° /16° 0 mm 9
Sept. 7 Sunny
Sunny
 36° /15° 0 mm 9
Sept. 8 Sunny
Sunny
 35° /15° 0 mm 8
Sept. 9 Partly cloudy
Partly cloudy
 35° /15° 0 mm 8
Sept. 10 Sunny
Sunny
 33° /14° 0 mm 8
Sept. 11 Sunny
Sunny
 32° /13° 0 mm 8
Sept. 12 Cloudy
Cloudy
 32° /12° 0 mm 7
Sept. 13 Sunny
Sunny
 34° /13° 0 mm 8
Sept. 14 Sunny
Sunny
 35° /14° 0 mm 8
Sept. 15 Sunny
Sunny
 34° /14° 0 mm 8
Sept. 16 Sunny
Sunny
 32° /14° 0.1 mm 8
Sept. 17 Sunny
Sunny
 41° /18° 0 mm 1.7
Sept. 18 Overcast
Overcast
 33° /20° 0 mm 1.2
Sept. 19 Heavy rain
Heavy rain
 31° /19° 29.3 mm 1.1
Sept. 20 Sunny
Sunny
 33° /17° 0 mm 1.6
Sept. 21 Sunny
Sunny
 36° /18° 0 mm 1.6
Sept. 22 Sunny
Sunny
 37° /20° 0 mm 0
Sept. 23 Partly cloudy
Partly cloudy
 22° /16° 0.1 mm 5
Sept. 24 Sunny
Sunny
 28° /14° 0 mm 5
Sept. 25 Sunny
Sunny
 29° /14° 0 mm 5
Sept. 26 Patchy rain possible
Patchy rain possible
 24° /14° 0.9 mm 4
Sept. 27 Patchy rain possible
Patchy rain possible
 24° /14° 0.5 mm 4
Sept. 28 Sunny
Sunny
 25° /13° 0 mm 5
Sept. 29 Sunny
Sunny
 27° /14° 0 mm 5
Sept. 30 Sunny
Sunny
 28° /15° 0 mm 6
Next
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.
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Modesto in September - FAQ

What are the expected maximum and minimum temperatures in Modesto during September?
Expect warm days with temperatures around 33°, cooling to mild conditions of 14° 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 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 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 ☀️

Quick links

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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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