Checked
Union, WA Climate
1991 to 2020 normals at Cushman Powerhouse #2, 4 mi from the center of Union, elevation 21 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 45° | 36° | 15.48 in | 1.3 in | |
| February | 48° | 35° | 9.20 in | 1.2 in | |
| March | 53° | 37° | 9.89 in | 0.1 in | |
| April | 58° | 40° | 6.13 in | 0.0 in | |
| May | 65° | 46° | 3.03 in | 0.0 in | |
| June | 70° | 50° | 1.91 in | 0.0 in | |
| July | 76° | 54° | 0.87 in | 0.0 in | |
| August | 76° | 54° | 1.40 in | 0.0 in | |
| September | 69° | 50° | 3.02 in | 0.0 in | |
| October | 58° | 44° | 9.10 in | 0.0 in | |
| November | 50° | 39° | 15.72 in | 0.1 in | |
| December | 44° | 35° | 16.21 in | 1.7 in | |
| Year | 59° | 91.96 in | 4.4 in |
Frequently asked questions
- What is the hottest month in Union, WA?
- July is the warmest month, with a normal high of 76°F at Cushman Powerhouse #2.
- What is the coldest month in Union, WA?
- February is the coldest month, with a normal low of 35°F.
- What is the wettest month in Union, WA?
- December has the most precipitation on average, about 16.21 inches.