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July is the hottest month in Denver CO, with an average high of 89°F / 32°C; December is the coldest (45°F / 7°C). May is the wettest month, averaging 2.3 in / 58 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 46 / 8 | 18 / -8 | 0.5 / 12 | 4 |
| Feb | 46 / 8 | 20 / -7 | 0.6 / 14 | 4 |
| Mar | 55 / 13 | 28 / -2 | 1.1 / 28 | 4 |
| Apr | 62 / 16 | 34 / 1 | 1.7 / 43 | 6 |
| May | 71 / 22 | 44 / 7 | 2.3 / 58 | 8 |
| Jun | 83 / 28 | 53 / 12 | 1.7 / 43 | 6 |
| Jul | 89 / 32 | 60 / 15 | 2.1 / 54 | 6 |
| Aug | 87 / 30 | 58 / 14 | 1.9 / 47 | 6 |
| Sep | 79 / 26 | 49 / 9 | 1.5 / 38 | 5 |
| Oct | 66 / 19 | 36 / 2 | 1.0 / 25 | 4 |
| Nov | 54 / 12 | 26 / -3 | 0.7 / 18 | 4 |
| Dec | 45 / 7 | 18 / -8 | 0.5 / 12 | 3 |
Extremes since 1940: highest 104°F / 40°C (June 26, 1994), lowest -25°F / -32°C (February 1, 1951).
Daylight lasts about 14.8 hours in June and 9.2 hours in December.
Data: Meteostat — Denver / Stapleton International, Co., 1991–2020 averages.
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