Napa Valley in august: average Weather, Temperature and Climate
Weather in Napa Valley in august 2025
The weather in Napa Valley in august comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout august
perfect weather UV index: 7
Weather at 6am
63°F
Clear/Sunny
85% of time
13%
2%
1%
Weather at 12pm
88°F
Clear/Sunny
91% of time
9%
1%
1%
Weather at 6pm
74°F
Clear/Sunny
93% of time
7%
1%
1%
Weather at 3am
58°F
71%
20%
9%
1%
Evolution of daily average temperature and precipitation in Napa Valley in august
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Napa Valley in august.
The climate of Napa Valley in august is perfect
the weather in Napa Valley in august is dry ; it never rains.
The climate quite comfortable in this location this month. Temperatures are up to 90°F. The minimum is 63°F. Thus, the mean temperature average on this month of august in Napa Valley is 76°F. Note that these seasonal averages are in contrast with those observed in Napa Valley in august with a maximum record of 110°F in 2010 and a minimum record of 49°F in 2021. You You can hope to have about 20 days with temperatures over 86°F, or 65 of the month.
In august in Napa Valley, the days on average last 13:38. Sunrise is at 05:25 and sunset is at 19:03.
With ideal weather conditions, the month of august is recommended to go in that area in United States.
Seasonal average climate and temperature of Napa Valley in august
Check below seasonal norms These statistics are generated from the weather statements earlier years of august.
| August | |||||
| Outside temperature | |||||
| Average temperature | 76°F | ||||
| Highest temperature | 90°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 110°F (2010) | ||||
| Lowest record temperature | 49°F (2021) | ||||
| Number of days at +86°F | 20 day(s) (65%) | ||||
| Number of days at +65°F | 31 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 13km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 0.1in | ||||
| Record daily rainfall | 0.1in (2020) | ||||
| Other climate data | |||||
| Humidity | 70% | ||||
| Visibility | 9.66km | ||||
| Cloud cover | 6% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 14 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:25 | ||||
| Time of sunset | 19:03 | ||||
| Length of day | 13:38 | ||||
| Our opinion about the weather in august | |||||
| Our opinion at whereandwhen.net | perfect | ||||
How was the weather last august?
Here is the day by day recorded weather in Napa Valley in august 2024:
58°F to 94°F
56°F to 94°F
61°F to 94°F
58°F to 94°F
54°F to 94°F
56°F to 99°F
56°F to 94°F
54°F to 94°F
58°F to 95°F
54°F to 94°F
50°F to 85°F
49°F to 85°F
52°F to 86°F
58°F to 90°F
54°F to 88°F
56°F to 88°F
52°F to 81°F
54°F to 83°F
52°F to 86°F
54°F to 88°F
54°F to 85°F
54°F to 81°F
50°F to 72°F
50°F to 79°F
50°F to 90°F
56°F to 94°F
59°F to 95°F
56°F to 92°F
58°F to 92°F
52°F to 92°F
50°F to 90°F
Map: other cities in California in august
Cities near Napa Valley:
| Bodega Bay in august | perfect weather |
| Stinson Beach in august | perfect weather |
| Jenner in august | perfect weather |
| Golden Gate National Recreation Area in august | perfect weather |
| Point Reyes in august | perfect weather |
| Oakland in august | perfect weather |
| San Francisco in august | perfect weather |
| Timber Cove in august | perfect weather |
| Sacramento in august | perfect weather |
| Sea Ranch in august | perfect weather |
| Moss Beach in august | good weather |
| Gualala in august | perfect weather |
Click over cities on the map for information about the weather in august.
Napa Valley
perfect weather
good
tolerable
bad
very bad
Weather data for Napa Valley in august:
Weather data for Napa Valley for august are derived from an average of the weather forecast since 2009 in Napa Valley. There is a margin of error and these forecasts are to be considered as general information only. The weather in Napa Valley can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Napa Valley.