Yountville (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Yountville.
Climate overview of Yountville
Temperatures in Yountville, California, United States of America, vary greatly throughout the year. July is the hottest month at 32°C (90°F), while December is the coldest at 14°C (57°F).
With around 660 mm (26 in) of annual rainfall, the city has moderate precipitation levels. December is the wettest month and August the driest. It also has a distinct dry season from May to October, with very warm summers and mild winters. May is the sunniest month, averaging 10.3 hours of sunshine per day.
Yountville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Yountville - and find the best time to visit.
Monthly Temperature in Yountville
The climate in Yountville is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 32°C (90°F) in July to a moderate 14°C (57°F) in the coolest month, December.
Nights vary from 13°C (55°F) in July to around 3°C (37°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Yountville
Generally, Yountville receives mid-range precipitation levels, with 660 mm (26 in) annually. The climate in Yountville shows significant variation throughout the year. Expect high rainfall in December, the wettest month, with an average of 139 mm (5.5 in) of precipitation over 12 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 Yountville 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 Yountville
For those who appreciate different seasons, Yountville serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 10.3 hours of sunshine daily, and embrace the darker days in December, offering only 5.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Yountville
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 and August
- Most sunshine: April, May, June and July
- Fewest rainy days: June, July, August and September
- Wettest months: January, February, March, 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 Yountville
What is the best time to visit Yountville?
April, May, June and October typically offer the most optimal weather in Yountville. In contrast, January, February and December tend to have less optimal conditions. Yountville has a distinct dry season from May to October, with very warm summers and mild winters.
What temperatures can I expect in Yountville?
Daytime highs range from 14°C (57°F) in December to 32°C (90°F) in July. Nighttime lows range from 3°C (37°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Yountville get?
Annual rainfall is around 660 mm (26 in). December is the wettest month with 139 mm (5.5 in), while August is the driest with 0 mm (0 in).
How sunny is Yountville?
Yountville receives around 3,042 hours of sunshine per year. May is the sunniest month with 310 hours, while December is the cloudiest with just 160 hours. Overall, Yountville enjoys abundant sunshine.
Yountville 3-Day Forecast
Yountville (CA) 3-Day Forecast
Yountville on the map
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