Fontana (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Fontana.
Climate overview of Fontana
Fontana, California, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 35°C (95°F) in August, while winters cool to 18°C (64°F) in December.
The city has a relatively dry climate, receiving around 301 mm (12 in) of rainfall per year. It does experience a distinct dry season from March to November, with very warm summers and pleasant winters. December is the wettest month and June the driest. The most sunshine falls in July, with an average of 12.3 hours of daily sunshine.
Fontana Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Fontana - and find the best time to visit.
Monthly Temperature in Fontana
Depending on the time of the year, temperatures range from very warm to pleasant in Fontana. On average, daytime temperatures range from a very warm 35°C (95°F) in August to a pleasant 18°C (64°F) in December.
Nighttime temperatures range from 18°C (64°F) in August to 7°C (45°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Fontana
Fontana maintains relatively dry conditions year-round, recording average annual precipitation of 301 mm (12 in). The seasons in Fontana bring significant changes in precipitation. The wettest month, December, receives moderate rainfall, with an average of 91 mm (3.6 in) of precipitation. This rainfall is distributed across 7 rainy days.
In contrast, the driest month, June, experiences much less rainfall, totaling 0.1 mm (0 in) over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Fontana Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Fontana
In Fontana, summer days are longer and more sunny, with daily sunshine hours peaking at 12.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 6.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Fontana
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, May, October and November
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewer rainy days: May, June, July, August and September
- Seasonal pattern: A distinct dry season from March to November, with very warm summers and pleasant winters
Frequently asked questions about the climate in Fontana
What is the best time to visit Fontana?
January, February, March, April, May, October and November typically offer the most optimal weather in Fontana. In contrast, July and August tend to have less optimal conditions. Fontana has a distinct dry season from March to November, with very warm summers and pleasant winters.
What temperatures can I expect in Fontana?
Daytime highs range from 18°C (64°F) in December to 35°C (95°F) in August. Nighttime lows range from 7°C (45°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Fontana get?
Annual rainfall is around 301 mm (12 in). December is the wettest month with 91 mm (3.6 in), while June is the driest with 0.1 mm (0 in).
How sunny is Fontana?
Fontana receives around 3,279 hours of sunshine per year. July is the sunniest month with 369 hours, while January is the cloudiest with just 198 hours. Overall, Fontana enjoys abundant sunshine.
Fontana 3-Day Forecast
Fontana (CA) 3-Day Forecast
Fontana on the map
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