Fountain Valley (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Fountain Valley.
Climate overview of Fountain Valley
Temperatures in Fountain Valley, California, United States of America, shift moderately through the seasons. The warmest month is September at 27°C (81°F), and the coolest is December at 19°C (66°F).
The area sees almost no rainfall, totalling just 206 mm (8.1 in) per year. The most sunshine falls in July, with an average of 12.3 hours of daily sunshine.
Fountain Valley Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Fountain Valley - and find the best time to visit.
Monthly Temperature in Fountain Valley
The weather in Fountain Valley changes moderately throughout the year, offering enough variation to appreciate each season. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in September to a pleasant 19°C (66°F) in the coolest month, December.
Nights vary from 19°C (66°F) in September to around 8°C (46°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Fountain Valley
Fountain Valley is known for its low rainfall, with yearly precipitation amounts around 206 mm (8.1 in). The climate in Fountain Valley shows significant variation throughout the year. Expect moderate rainfall in December, the wettest month, with an average of 54 mm (2.1 in) of precipitation over 8 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 0 mm (0 in) of rainfall over 0 rainy days. For more details, please visit our Fountain Valley 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 Fountain Valley
For those who appreciate different seasons, Fountain Valley serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.3 hours of sunshine daily, and embrace the darker days in January, offering only 6.6 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Fountain Valley
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, June, July, August, September, 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: Very little rainfall for most of the year
Frequently asked questions about the climate in Fountain Valley
What is the best time to visit Fountain Valley?
January, February, March, April, May, June, July, August, September, October and November typically offer the most optimal weather in Fountain Valley. In contrast, December tends to have less optimal conditions. Fountain Valley has very little rainfall for most of the year.
What temperatures can I expect in Fountain Valley?
Daytime highs range from 19°C (66°F) in December to 27°C (81°F) in September. Nighttime lows range from 8°C (46°F) to 19°C (66°F).
How much rain does Fountain Valley get?
Annual rainfall is around 206 mm (8.1 in). December is the wettest month with 54 mm (2.1 in), while August is the driest with 0 mm (0 in).
How sunny is Fountain Valley?
Fountain Valley 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, Fountain Valley enjoys abundant sunshine.
Fountain Valley 3-Day Forecast
Fountain Valley on the map
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