US Geography / US Weather / Washington Weather / Richland |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 38° | 46° | 57° | 65° | 75° | 84° | 91° | 90° | 80° | 66° | 48° | 38° |
| Avg. Low | 22° | 26° | 32° | 38° | 45° | 54° | 58° | 56° | 47° | 36° | 28° | 22° |
| Mean | 30° | 37° | 45° | 52° | 61° | 68° | 75° | 74° | 64° | 52° | 40° | 31° |
| Avg. Precip. | 1.0 in | 0.8 in | 0.7 in | 0.5 in | 0.6 in | 0.5 in | 0.3 in | 0.4 in | 0.4 in | 0.4 in | 1.1 in | 1.4 in |
Degrees in Fahrenheit
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