Napa Valley weather in August
Thinking about venturing to Napa Valley this August and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:
What is the weather like in Napa Valley in August?
Napa Valley is a region in the United States of America. August in Napa Valley generally has temperatures that range from warm to very warm, with almost no precipitation. During August, summer is in full swing.
The average highest temperatures fluctuate between warm in American Canyon at 27°C to very warm in Calistoga at 32°C. Nighttime temperatures generally drop to 12°C in Calistoga and 12°C in American Canyon.
August is a very dry month with an average rainfall of around 0.1 mm in Napa. Looking at the climate data spanning the last 30 years, this month usually has the lowest rainfall in Napa, marking it as the year's driest month. Meanwhile, Napa enjoys approximately 290 hours of sunshine, offering a mostly sunny climate that adds a pleasant and vibrant feel to the month.
For a closer look at August's conditions in Napa Valley, see the map below. For a more detailed look at Napa Valley's yearly weather, check out our Napa Valley climate page.
Where to go in Napa Valley in August
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Popular destinations
What is the weather like in August for the 5 most popular destinations in Napa Valley?
Napa
In August Napa generally has high temperatures with maximum daytime temperatures around 29°C, minimum nighttime temperatures around 13°C and almost no monthly rainfall. So on average the conditions are perfect that month.
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Calistoga
In August Calistoga generally has very high temperatures with maximum daytime temperatures around 32°C, minimum nighttime temperatures around 12°C and almost no monthly rainfall. So on average the conditions are perfect that month.
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St. Helena
In August St. Helena generally has very high temperatures with maximum daytime temperatures around 31°C, minimum nighttime temperatures around 13°C and almost no monthly rainfall. So on average the conditions are perfect that month.
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Yountville
In August Yountville generally has very high temperatures with maximum daytime temperatures around 31°C, minimum nighttime temperatures around 12°C and almost no monthly rainfall. So on average the conditions are perfect that month.
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American Canyon
In August American Canyon generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 12°C and almost no monthly rainfall. So on average the conditions are perfect that month.
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Is your destination not in the list? Have a look at other destinations in Napa Valley, in the United States of America.
Is August the best time to visit Napa Valley?
We consider August to be one of the best times to travel to Napa Valley. Typically, the climate in Napa is perfect.
Generally speaking, April, May, June, July, August, September and October provide perfect weather in Napa. On the other hand, the weather in February and December tend to be unpleasant.
Interested in more climate information?
We have much more information about the climate in Napa Valley.
Interested in the weather conditions in a specific month? Select the month below.
Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.