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Fountain Valley (CA) Weather and Climate: A Comprehensive Guide

Temperatures in Fountain Valley experience a moderate degree of variance through the seasons. Days can be warm, while the cooler months tend to be pleasant. It experiences desert-like conditions in terms of precipitation, with almost no rainfall. Let's now guide you through the climate details for a complete overview.

Average maximum day and minimum night temperature

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 in September to a pleasant 19°C in the coolest month, December.

Nights are cooler, with lows often dropping to around 8°C during the colder months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Fountain Valley is known for its low rainfall, with yearly precipitation amounts around 206 mm. The climate in Fountain Valley shows significant variation throughout the year. Expect moderate rainfall in December, with an average of 54 mm of precipitation over 8 rainy days.

In contrast, August offers drier and sunnier days, with around 0 mm 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

Sunshine over the year

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

Data from: Corona, the United States of America (41 KM, 25 Miles).

Daily hours of sunshine

Data from: Corona, the United States of America (41 KM, 25 Miles).

Forecast for Fountain Valley (CA)

Fri   Dec 27
18°C | 8°C
SE 3 m/s
broken clouds and no rain

broken clouds and no rain

Sat   Dec 28
19°C | 11°C
SW 3 m/s
broken clouds and no rain

broken clouds and no rain

Sun   Dec 29
18°C | 10°C
SW 3 m/s
partly cloudy and no rain

partly cloudy and no rain

The best time of year to visit Fountain Valley in the United States of America

During the months of January, February, March, April, May, June, July, October and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Fountain Valley?
    The hottest season / summer takes place in July, August, September and October.
  • Which is the warmest month in Fountain Valley?
    September has an average maximum temperature of 27°C and is the warmest month of the year.
  • Which is the coldest month in Fountain Valley?
    The coldest month is December with an average maximum temperature of 19°C.
  • Which is the wettest month in Fountain Valley?
    December tops the wettest month list with 54 mm of rainfall.
  • Which is the driest month in Fountain Valley?
    August is the driest month with 0 mm of precipitation.
  • Which is the sunniest month in Fountain Valley?
    July is the sunniest month with an average of 369 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.