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Weather in Modesto for September 2025

Your guide to Modesto weather in September - trends and predictions

    Temperatures

  • 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.

    • Rain 🌧️

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

    • More

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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 in September average weather

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Overcast
32°
2
Overcast
32°
3
Patchy rain possible
33°
4
Cloudy
37°
5
Sunny
38°
6
Sunny
40°
7
Sunny
38°
8
Sunny
38°
9
Partly cloudy
38°
10
Sunny
36°
11
Sunny
34°
12
Cloudy
32°
13
Sunny
34°
14
Sunny
36°
15
Sunny
33°
16
Sunny
28°
17
Overcast
28°
18
Cloudy
27°
19
Mist
31°
20
Sunny
32°
21
Partly cloudy
32°
22
Partly cloudy
33°
23
Overcast
34°
24
Mist
36°
25
Mist
33°
26
Partly cloudy
32°
27
Partly cloudy
35°
28
Partly cloudy
34°
29
Cloudy
34°
30
Light rain shower
28°
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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

Click on a date for more information
August October
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 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 ☀️

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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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