Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Vacaville (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Vacaville.
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Climate overview of Vacaville
Vacaville, California, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 34°C (93°F) in July, while winters cool to 14°C (57°F) in December.
Vacaville sees a moderate amount of rainfall, totalling around 504 mm (20 in) per year. It experiences a distinct dry season from May to October, with very warm summers and mild winters, creating some seasonal variation. The most sunshine falls in July, with an average of 14.7 hours of daily sunshine.
Vacaville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Vacaville - and find the best time to visit.
Monthly Temperature in Vacaville
Depending on the time of the year, temperatures range from very warm to moderate in Vacaville. Average maximum daytime temperatures range from a very warm 34°C (93°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 15°C (59°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 Vacaville
Generally, Vacaville has a moderate amount of precipitation, averaging 504 mm (20 in) of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives high rainfall, averaging 100 mm (3.9 in) of precipitation, recorded across 11 rainy days. In contrast, the driest month August brings less rainfall, with 0.1 mm (0 in) over 0 rainy days. For more details, please visit our Vacaville 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 Vacaville
Seasonal changes in sunshine hours are quite dramatic in Vacaville. 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
Data from: Sacramento, the United States of America (49 KM, 30 Miles).
Daily hours of sunshine
Data from: Sacramento, the United States of America (49 KM, 30 Miles).
Daily percentage of sunshine
Data from: Sacramento, the United States of America (49 KM, 30 Miles).
Humidity in Vacaville by Month
The relative humidity is high throughout the year in Vacaville.
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
Data from: Sacramento, the United States of America (49 KM, 30 Miles).
Best Time to Visit Vacaville
For comfortable weather, consider visiting Vacaville in April, May and October. Conditions are usually least favourable in July.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
good
Feb
good
Mar
very good
Apr
excellent
May
excellent
Jun
very good
Jul
very hot
Aug
good
Sep
very good
Oct
excellent
Nov
very good
Dec
mixed
- Best overall: April, May and October
- Warmest weather: July and August
- Most sunshine: June and July
- Fewest rainy days: June, July, August and September
- Wettest months: January, February, March, April, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from May to October, with very warm summers and mild winters
Frequently asked questions about the climate in Vacaville
What is the best time to visit Vacaville?
April, May and October typically offer the most optimal weather in Vacaville. In contrast, July tends to have less optimal conditions. Vacaville has a distinct dry season from May to October, with very warm summers and mild winters.
What temperatures can I expect in Vacaville?
Daytime highs range from 14°C (57°F) in December to 34°C (93°F) in July. Nighttime lows range from 3°C (37°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Vacaville get?
Annual rainfall is around 504 mm (20 in). December is the wettest month with 100 mm (3.9 in), while August is the driest with 0.1 mm (0 in).
How sunny is Vacaville?
Vacaville 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, Vacaville enjoys abundant sunshine.
Vacaville 3-Day Forecast
Vacaville on the map
Vacaville is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
Miami Beach
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29°C (84°F) Destin26°C (79°F) Los Angeles24°C (75°F) New York City19°C (66°F) Big Bear Lake19°C (66°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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