US Geography / US Weather / Washington Weather / Stevenson |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 42 | 47 | 54 | 58 | 66 | 72 | 78 | 78 | 74 | 64 | 51 | 44 |
| Avg. Low | 34 | 35 | 37 | 41 | 46 | 52 | 56 | 56 | 52 | 46 | 40 | 34 |
| Mean | 38 | 42 | 46 | 50 | 56 | 62 | 67 | 68 | 64 | 55 | 46 | 38 |
| Avg. Precip. | 9.3 in | 7.8 in | 5.5 in | 3.7 in | 2.6 in | 1.0 in | 1.6 in | 3.3 in | 5.6 in |
Degrees in Fahrenheit
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