Temperature in The Napa Valley in July

Daytime highs, nighttime lows and the warmest cities in the Napa Valley, the United States of America this July.

The Napa Valley, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in July ranging from 27°C (81°F) in American Canyon to 32°C (90°F) in Calistoga. Nighttime temperatures generally drop to 13°C (55°F) in Calistoga and 13°C (55°F) in American Canyon. The month of July is in the summer season.

What is the temperature of the different cities in the Napa Valley, the United States of America in July?

Find the average daytime temperatures in July for the most popular destinations in the Napa Valley on the map below. Click on a destination dot for more detailed information.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit the Napa Valley, check out our the Napa Valley's climate page.

See also: the Napa Valley weather by month.

Best Places to Visit in the Napa Valley in July

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across the Napa Valley.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in July: blue is cold, red is hot.

See all July weather averages, cities and regions in the Napa Valley

The Napa Valley temperatures in July: frequently asked questions

How hot does it get in the Napa Valley, the United States of America in July?

Daytime temperatures in Napa typically peak at 29°C (84°F) in July, putting it in the high range.

How cold does it get at night in the Napa Valley, the United States of America in July?

Napa sees nighttime lows close to 13°C (55°F) in July.

What is the warmest city in July in the Napa Valley, the United States of America?

From a thorough analysis of our records, Calistoga clearly dominates in terms of high temperatures. The city witnesses daytime temperatures hovering around 32°C (90°F), and evenings that remain near 13°C (55°F).

What is the coldest city in July in the Napa Valley, the United States of America?

The coldest city in July in the Napa Valley, the United States of America is American Canyon when we check our database. The maximum daytime temperatures are around 27°C (81°F) and minimum nighttime temperatures fall around 13°C (55°F).

How much sun does the Napa Valley, the United States of America get in July?

Napa enjoys close to 306 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

Interested in more climate information?

We have much more information about the climate in the Napa Valley.

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.

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