US Geography / US Weather / Washington Weather / Mt Vernon |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 45 | 48 | 52 | 57 | 64 | 68 | 72 | 74 | 68 | 58 | 50 | 45 |
| Avg. Low | 34 | 35 | 36 | 38 | 44 | 48 | 50 | 50 | 46 | 41 | 37 | 34 |
| Mean | 38 | 42 | 45 | 48 | 54 | 58 | 62 | 62 | 58 | 51 | 44 | 40 |
| Avg. Precip. | 4.3 in | 3.0 in | 2.8 in | 2.5 in | 2.3 in | 1.8 in | 1.3 in | 1.5 in | 2.0 in | 3.0 in | 4.3 in | 4.3 in |
Degrees in Fahrenheit
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