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Napa, CA Climate
1991 to 2020 normals at Napa State Hospital, 1.5 mi from the center of Napa, elevation 35 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 59° | 40° | 4.98 in | 0.0 in | |
| February | 63° | 42° | 5.13 in | 0.0 in | |
| March | 68° | 44° | 3.67 in | 0.0 in | |
| April | 72° | 46° | 1.72 in | 0.0 in | |
| May | 77° | 50° | 1.08 in | 0.0 in | |
| June | 82° | 54° | 0.29 in | 0.0 in | |
| July | 83° | 56° | 0.00 in | 0.0 in | |
| August | 84° | 56° | 0.06 in | 0.0 in | |
| September | 84° | 53° | 0.09 in | 0.0 in | |
| October | 78° | 49° | 1.34 in | 0.0 in | |
| November | 66° | 44° | 2.77 in | 0.0 in | |
| December | 59° | 40° | 5.53 in | 0.0 in | |
| Year | 73° | 26.66 in | 0.0 in |
Frequently asked questions
- What is the hottest month in Napa, CA?
- September is the warmest month, with a normal high of 84°F at Napa State Hospital.
- What is the coldest month in Napa, CA?
- December is the coldest month, with a normal low of 40°F.
- What is the wettest month in Napa, CA?
- December has the most precipitation on average, about 5.53 inches.