US Geography / US Weather / California Weather / Napa |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 56 | 62 | 64 | 68 | 74 | 78 | 82 | 81 | 81 | 76 | 64 | 56 |
| Avg. Low | 37 | 40 | 41 | 44 | 47 | 51 | 54 | 54 | 52 | 48 | 42 | 38 |
| Mean | 47 | 52 | 54 | 56 | 61 | 66 | 68 | 68 | 67 | 62 | 54 | 48 |
| Avg. Precip. | 5.4 in | 3.9 in | 3.7 in | 1.6 in | 0.3 in | 0.3 in | 0.1 in | 0.1 in | 0.4 in | 1.7 in | 3.9 in | 3.9 in |
Degrees in Fahrenheit
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