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Cosmopolis, WA Climate
1991 to 2020 normals at Aberdeen, 2.8 mi from the center of Cosmopolis, elevation 10 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 48° | 37° | 13.93 in | 0.0 in | |
| February | 50° | 37° | 8.58 in | 0.1 in | |
| March | 53° | 38° | 9.76 in | 0.2 in | |
| April | 57° | 41° | 6.28 in | 0.0 in | |
| May | 61° | 47° | 3.46 in | 0.0 in | |
| June | 65° | 51° | 2.40 in | 0.0 in | |
| July | 68° | 54° | 0.91 in | 0.0 in | |
| August | 69° | 54° | 1.52 in | 0.0 in | |
| September | 69° | 51° | 2.73 in | 0.0 in | |
| October | 61° | 45° | 8.27 in | 0.0 in | |
| November | 52° | 40° | 13.72 in | 0.2 in | |
| December | 47° | 37° | 13.38 in | 0.0 in | |
| Year | 58° | 84.94 in | 0.5 in |
Frequently asked questions
- What is the hottest month in Cosmopolis, WA?
- August is the warmest month, with a normal high of 69°F at Aberdeen.
- What is the coldest month in Cosmopolis, WA?
- December is the coldest month, with a normal low of 37°F.
- What is the wettest month in Cosmopolis, WA?
- January has the most precipitation on average, about 13.93 inches.