Fairfield (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Fairfield.
Climate overview of Fairfield
Fairfield, California, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 31°C (88°F) in July, while winters cool to 14°C (57°F) in December.
Rainfall is modest, totalling around 464 mm (18 in) annually. The city experiences a distinct dry season from May to October, with very warm summers and mild winters. December tends to be the wettest month. The most sunshine falls in July, with an average of 14.7 hours of daily sunshine.
Fairfield Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Fairfield - and find the best time to visit.
Monthly Temperature in Fairfield
Depending on the time of the year, temperatures range from very warm to moderate in Fairfield. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a moderate 14°C (57°F) during cooler months like December.
At night, you can expect temperatures ranging from 14°C (57°F) in July to around 3°C (37°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Fairfield
Fairfield maintains relatively dry conditions year-round, recording average annual precipitation of 464 mm (18 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 95 mm (3.7 in) of precipitation, recorded across 11 rainy days. In contrast, the driest month July brings less rainfall, with 0.1 mm (0 in) over 0 rainy days. For more details, please visit our Fairfield 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 Fairfield
Seasonal changes in sunshine hours are quite dramatic in Fairfield. While July receives considerable daily sunshine with up to 14.7 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Fairfield by Month
The relative humidity is high throughout the year in Fairfield.
The city experiences its highest humidity in January, reaching 83%. In July, the humidity drops to its lowest level at 53%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Fairfield
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, June and October
- Warmest weather: July, August and September
- Most sunshine: June and July
- Fewest rainy days: June, July, August and September
- Seasonal pattern: A distinct dry season from May to October, with very warm summers and mild winters
Frequently asked questions about the climate in Fairfield
What is the best time to visit Fairfield?
April, May, June and October typically offer the most optimal weather in Fairfield. In contrast, January, February and December tend to have less optimal conditions. Fairfield has a distinct dry season from May to October, with very warm summers and mild winters.
What temperatures can I expect in Fairfield?
Daytime highs range from 14°C (57°F) in December to 31°C (88°F) in July. Nighttime lows range from 3°C (37°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Fairfield get?
Annual rainfall is around 464 mm (18 in). December is the wettest month with 95 mm (3.7 in), while July is the driest with 0.1 mm (0 in).
How sunny is Fairfield?
Fairfield receives around 3,602 hours of sunshine per year. July is the sunniest month with 440 hours, while December is the cloudiest with just 141 hours. Overall, Fairfield enjoys abundant sunshine.
Fairfield 3-Day Forecast
Fairfield (CA) 3-Day Forecast
Fairfield on the map
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