The best times to visit Napa for ideal weather are

April 30th to October 28th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Napa Travel Info

Weather in Napa


Average temperatures in Napa vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 52nd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Napa, the hottest months are August, September, and then July. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 86.5°F (30.3°C) with temperatures rarely dropping below 51.8°F (11°C) at night.

Napa Temperatures (Fahrenheit)


Napa Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Napa Perceived Temperature (F)


Napa Perceived Temperature (C)



Average Napa Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 59 46.1 34.9
Feb 61.9 49.4 38.5
Mar 65.9 52.3 40.4
Apr 69.7 54.7 41.3
May 74 58.7 45.5
Jun 79.7 63.2 50.1
Jul 79.5 64.1 53.4
Aug 80.3 64.2 53
Sep 82.4 64.2 50.1
Oct 76.5 59.6 45.7
Nov 66.1 51.9 39.1
Dec 57.5 46.3 36.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 15 7.8 1.6
Feb 16.6 9.7 3.6
Mar 18.8 11.3 4.7
Apr 20.9 12.6 5.2
May 23.3 14.8 7.5
Jun 26.5 17.3 10.1
Jul 26.4 17.8 11.9
Aug 26.8 17.9 11.7
Sep 28 17.9 10.1
Oct 24.7 15.3 7.6
Nov 18.9 11.1 3.9
Dec 14.2 7.9 2.4



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Napa are July, August, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid June. For example, on the week of June 11th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early February with an average of 2 days of significant precipitation the week of February 5th.

When can you find snow in Napa? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Napa.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Napa (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 14% 0 2.5
Feb 24% 0 2.9
Mar 13% 0 2.2
Apr 11% 0 1.4
May 5% 0 0.4
Jun 2% 0 0.3
Jul 0% 0 0
Aug 0% 0 0
Sep 1% 0 0.2
Oct 9% 0 1.3
Nov 13% 0 1.7
Dec 22% 0 3.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 14 0 6.4
Feb 24 0 7.4
Mar 13 0 5.6
Apr 11 0 3.6
May 5 0 1
Jun 2 0 0.8
Jul 0 0 0
Aug 0 0 0
Sep 1 0 0.5
Oct 9 0 3.3
Nov 13 0 4.3
Dec 22 0 9.1


Humidity and Wind

Napa has some very humid months, with other comfortably humid months. The least humid month is June (58.2% relative humidity), and the most humid month is December (71.8%).

Wind in Napa is usually calm. The windiest month is July, followed by June and May. July’s average wind speed of around 8.7 knots (10 MPH or 16.1 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early June where average top sustained speeds reach 17.3 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Napa.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 4.9 Light breeze 12 Significant breeze
Feb 5.3 Light breeze 12.9 Significant breeze
Mar 5.8 Light breeze 13.9 Significant breeze
Apr 6.9 Light breeze 15.7 Significant breeze
May 7.9 Gentle breeze 16 Significant breeze
Jun 8.4 Gentle breeze 16.2 Significant breeze
Jul 8.7 Gentle breeze 15.8 Significant breeze
Aug 7.8 Gentle breeze 14.9 Significant breeze
Sep 6.3 Light breeze 13.7 Significant breeze
Oct 4.9 Light breeze 12.1 Significant breeze
Nov 4.4 Light breeze 11.2 Significant breeze
Dec 4.9 Light breeze 11.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 69.5%
Feb 70.9%
Mar 67.4%
Apr 62.2%
May 59.4%
Jun 58.2%
Jul 63.6%
Aug 63.7%
Sep 58.5%
Oct 59.8%
Nov 66.4%
Dec 71.8%


Is it Safe to Travel to Napa?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Napa, CA, US is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Napa in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is very reliable. Displayed data is calculated relative to the peak, so a score of 36.3 in December means 36.3% of the tourists vs. July.



Overall Napa Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 75.7°F (24.3°C) and 62.4°F (16.9°C) with warmer temperatures in the later months. Rain is rare with 1 to 4 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in Napa, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 83.6°F (28.7°C) and 62.1°F (16.7°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 0 to 4 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Napa to be enjoyable for warm weather travelers. The average high during this season is between 63.2°F (17.3°C) and 56°F (13.3°C). On average, it rains or snows a fair amount: 4 to 7 times per month. These times of year are fairly slow with tourists.


Best Times to Travelthe United States › Napa, CA, US