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Weather in Fontana for September 2025

Your guide to Fontana weather in September - trends and predictions
  • In general, the average temperature in Fontana at the beginning of September is 33.4 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 30.9 °F by the end of September.

  • With an average of 4 rainy days, Fontana experiences minimal rainfall in September.

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Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/16°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
52 %
Avg humidity

Fontana in September average weather

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Temperatures trend during September in Fontana

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 Patchy rain possible
Patchy rain possible
33° /21° 0.7 mm 8
Sept. 2 Light rain
Light rain
33° /20° 1.9 mm 8
Sept. 3 Light rain
Light rain
30° /19° 3.1 mm 8
Sept. 4 Partly cloudy
Partly cloudy
32° /19° 0 mm 8
Sept. 5 Partly cloudy
Partly cloudy
34° /21° 0 mm 8
Sept. 6 Partly cloudy
Partly cloudy
36° /22° 0 mm 9
Sept. 7 Sunny
Sunny
36° /23° 0 mm 8
Sept. 8 Partly cloudy
Partly cloudy
36° /26° 0 mm 8
Sept. 9 Sunny
Sunny
37° /26° 0 mm 9
Sept. 10 Cloudy
Cloudy
34° /25° 0 mm 8
Sept. 11 Partly cloudy
Partly cloudy
31° /22° 0 mm 8
Sept. 12 Sunny
Sunny
29° /17° 0 mm 8
Sept. 13 Sunny
Sunny
29° /17° 0 mm 8
Sept. 14 Sunny
Sunny
29° /17° 0 mm 7
Sept. 15 Partly cloudy
Partly cloudy
27° /16° 0 mm 7
Sept. 16 Sunny
Sunny
26° /15° 0.1 mm 6
Sept. 17 Partly cloudy
Partly cloudy
24° /12° 0 mm 6
Sept. 18 Cloudy
Cloudy
23° /12° 0 mm 6
Sept. 19 Partly cloudy
Partly cloudy
22° /13° 0 mm 6
Sept. 20 Partly cloudy
Partly cloudy
22° /12° 0 mm 5
Sept. 21 Patchy rain possible
Patchy rain possible
22° /12° 0 mm 6
Sept. 22 Overcast
Overcast
28° /14° 0 mm 7
Sept. 23 Partly cloudy
Partly cloudy
33° /19° 0 mm 8
Sept. 24 Sunny
Sunny
32° /18° 0 mm 8
Sept. 25 Sunny
Sunny
31° /18° 0 mm 8
Sept. 26 Overcast
Overcast
32° /18° 0 mm 8
Sept. 27 Partly cloudy
Partly cloudy
32° /19° 0 mm 8
Sept. 28 Sunny
Sunny
31° /18° 0 mm 8
Sept. 29 Sunny
Sunny
31° /18° 0 mm 8
Sept. 30 Light rain shower
Light rain shower
27° /16° 1.9 mm 7
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Important Notice
Our weather forecast for Fontana 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 Fontana forecast closer to your planned date for the most up-to-date weather information.

Fontana in September - FAQ

What are the expected maximum and minimum temperatures in Fontana during September?
During September, expect a variety of temperatures with highs around 29° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fontana during September?
Expect minimal rainfall in Fontana during September, with a total of 15.2 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Fontana during September?
The average wind speed in Fontana during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Fontana

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

UV exposure in Fontana during September

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

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Location coordinates Where is Fontana?

Get accurate weather forecasts for Fontana, located at latitude 34.092 and longitude -117.435. Stay updated with localized weather information tailored for Fontana.

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