Napa Weather: August
 |
Average Day Temperature: | 90.9°F |
|
Average Night Temperature: | 60.4°F |
|
Number of Sunny Days: | 28 days |
| Sunshine Hours: | 13.0 - 14.1 hours | |
|
Number of Rainy Days: | 0 days |
| Precipitation Totals: | 0.0 in | |
| detailed information | ||
Air Temperature in August, °F
The highest day temperature in August 2025 was 101°F. The lowest night temperature was 53°F. The average values for day and night temperatures during August were 89.4°F и 57.5°F respectivly.
Sunny, Cloudy and Gloomy days
Most of the days in August are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in August, in
Precipitation total in August for Napa is 0.0 in. It makes august the least rainy month of the year.
Wind Speed in August, mph
The average wind speed in August is 5.1 mph. This value is relatively stable throughout the year.
Average Sunny Hours Per Day
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Napa in August is 12.4 hours.
Napa on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+56 |
| Chicago |  |
+56 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston | |
+98 |
| Las Vegas | |
+102 |
| Los Angeles | |
+76 |
| Maui |  |
+72 |
| Miami | |
+90 |
| Miami Beach | |
+92 |
| New York |  |
+70 |
| San Diego | |
+72 |
| San Francisco | |
+72 |
| Sarasota | |
+96 |
| Tampa | |
+96 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Napa
Local time: 10:55
14 may, thursday
| 1200 |  |
78°F | NE 6 mph |
| 1500 | |
86°F | NE 9 mph |
| 1800 | |
84°F | NE 7 mph |
| 2100 |  |
64°F | NE 6 mph |
15 may, friday
| 0000 | |
54°F | E 5 mph |
| 0300 | |
50°F | E 3 mph |
| 0600 | |
50°F | E 3 mph |
| 0900 | |
66°F | NE 2 mph |