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Fontana (CA)
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United States weather

Weather in Fontana, California for August 2025

Your guide to Fontana weather in August - trends and predictions

    Temperatures

  • The forecast for the first days of August 2025 in Fontana predicts temperatures to be around 36 °F, close to the historical average.

  • In general, the average temperature in Fontana at the beginning of August is 36.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.4 °F by the end of August.

    • Rain 🌧️

  • With an average of 3 rainy days, Fontana experiences minimal rainfall in August.

    • More

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

Average dry days
28
Dry days
Average rainy days
3
Rainy days
Average snowy days
0
Snow days
Average temperatures
34°/22°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
35 %
Avg humidity

Fontana Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
33°
2
Sunny
36°
3
Sunny
36°
4
Partly cloudy
36°
5
Sunny
36°
6
Sunny
38°
7
Sunny
40°
8
Sunny
41°
9
Sunny
39°
10
Sunny
37°
11
Sunny
35°
12
Patchy rain possible
35°
13
Partly cloudy
35°
14
Sunny
35°
15
Sunny
36°
16
Heavy rain at times
36°
17
Sunny
37°
18
Sunny
35°
19
Patchy rain possible
33°
20
Moderate or heavy rain shower
31°
21
Patchy rain possible
31°
22
Partly cloudy
31°
23
Sunny
30°
24
Partly cloudy
29°
25
Sunny
32°
26
Sunny
34°
27
Sunny
35°
28
Sunny
35°
29
Sunny
36°
30
Sunny
35°
31
Sunny
34°

Temperatures trend during August in Fontana

See the weather trend as well as the moving average line

August weather in Fontana day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Sunny
Sunny
 33° /21° 0 mm 3.1
Aug. 2 Sunny
Sunny
 36° /21° 0 mm 3
Aug. 3 Sunny
Sunny
 36° /20° 0 mm 0
Aug. 4 Partly cloudy
Partly cloudy
 36° /21° 0 mm 7
Aug. 5 Sunny
Sunny
 36° /20° 0 mm 7
Aug. 6 Sunny
Sunny
 38° /22° 0 mm 7
Aug. 7 Sunny
Sunny
 40° /24° 0 mm 8
Aug. 8 Sunny
Sunny
 41° /25° 0 mm 8
Aug. 9 Sunny
Sunny
 39° /25° 0 mm 8
Aug. 10 Sunny
Sunny
 37° /22° 0 mm 7
Aug. 11 Sunny
Sunny
 35° /21° 0 mm 7
Aug. 12 Patchy rain possible
Patchy rain possible
 35° /22° 0.4 mm 6
Aug. 13 Partly cloudy
Partly cloudy
 35° /21° 0 mm 7
Aug. 14 Sunny
Sunny
 35° /21° 0 mm 9
Aug. 15 Sunny
Sunny
 36° /22° 0 mm 9
Aug. 16 Heavy rain at times
Heavy rain at times
 36° /24° 0.6 mm 9
Aug. 17 Sunny
Sunny
 37° /23° 0 mm 9
Aug. 18 Sunny
Sunny
 35° /21° 0 mm 9
Aug. 19 Patchy rain possible
Patchy rain possible
 33° /22° 0.4 mm 8
Aug. 20 Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /21° 36.5 mm 7
Aug. 21 Patchy rain possible
Patchy rain possible
 31° /20° 12.4 mm 8
Aug. 22 Partly cloudy
Partly cloudy
 31° /18° 0 mm 8
Aug. 23 Sunny
Sunny
 30° /17° 0 mm 8
Aug. 24 Partly cloudy
Partly cloudy
 29° /18° 0 mm 8
Aug. 25 Sunny
Sunny
 32° /19° 0 mm 8
Aug. 26 Sunny
Sunny
 34° /21° 0 mm 9
Aug. 27 Sunny
Sunny
 35° /22° 0 mm 9
Aug. 28 Sunny
Sunny
 35° /22° 0 mm 9
Aug. 29 Sunny
Sunny
 36° /22° 0 mm 9
Aug. 30 Sunny
Sunny
 35° /23° 0 mm 9
Aug. 31 Sunny
Sunny
 34° /22° 0 mm 8
Next
Important Notice
Our weather forecast for Fontana in August 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.
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Fontana in August - FAQ

What are the expected maximum and minimum temperatures in Fontana during August?
During August, expect a variety of temperatures with highs around 34° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fontana during August?
Moderate rainfall is anticipated in Fontana during August, with a total of 53.5 mm spread over approximately 3 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Fontana during August?
The average wind speed in Fontana during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Fontana

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

UV exposure in Fontana during August

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

Quick links

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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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