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Boulder, CO Climate
1991 to 2020 normals at Boulder, 2.4 mi from the center of Boulder, elevation 5484 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 47° | 22° | 0.83 in | 11.3 in | |
| February | 48° | 22° | 0.99 in | 15.0 in | |
| March | 57° | 29° | 1.99 in | 15.7 in | |
| April | 63° | 35° | 3.05 in | 14.7 in | |
| May | 71° | 43° | 3.21 in | 2.0 in | |
| June | 83° | 51° | 1.95 in | 0.0 in | |
| July | 88° | 57° | 1.83 in | 0.0 in | |
| August | 86° | 56° | 1.68 in | 0.0 in | |
| September | 79° | 48° | 2.09 in | 1.0 in | |
| October | 66° | 37° | 1.62 in | 7.0 in | |
| November | 55° | 28° | 1.18 in | 13.1 in | |
| December | 46° | 21° | 0.81 in | 13.0 in | |
| Year | 66° | 21.23 in | 92.8 in |
Frequently asked questions
- What is the hottest month in Boulder, CO?
- July is the warmest month, with a normal high of 88°F at Boulder.
- What is the coldest month in Boulder, CO?
- December is the coldest month, with a normal low of 21°F.
- What is the wettest month in Boulder, CO?
- May has the most precipitation on average, about 3.21 inches.