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Dewey, MT Climate
1991 to 2020 normals at Divide, 5.2 mi from the center of Dewey, elevation 5350 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 33° | 11° | 0.27 in | 2.4 in | |
| February | 36° | 12° | 0.55 in | 2.0 in | |
| March | 45° | 20° | 0.67 in | 2.6 in | |
| April | 52° | 26° | 0.89 in | 0.8 in | |
| May | 62° | 35° | 1.78 in | 0.1 in | |
| June | 70° | 41° | 2.10 in | 0.0 in | |
| July | 82° | 46° | 1.05 in | 0.0 in | |
| August | 80° | 44° | 1.02 in | 0.0 in | |
| September | 70° | 37° | 1.13 in | 0.1 in | |
| October | 57° | 28° | 0.83 in | 0.9 in | |
| November | 42° | 17° | 0.50 in | 1.7 in | |
| December | 31° | 9° | 0.51 in | 4.6 in | |
| Year | 55° | 11.30 in | 15.2 in |
Frequently asked questions
- What is the hottest month in Dewey, MT?
- July is the warmest month, with a normal high of 82°F at Divide.
- What is the coldest month in Dewey, MT?
- December is the coldest month, with a normal low of 9°F.
- What is the wettest month in Dewey, MT?
- June has the most precipitation on average, about 2.10 inches.