WeatherArchive / Climate averages / Denver
Denver climate: average weather by month
Denver averages 49°F (10°C) over the year. July is warmest, with highs around 87°F (31°C); January is coldest, with lows near 15°F (-9°C). About 19 inches (474 mm) of precipitation falls on roughly 81 days a year, from 30 years of ERA5 data (1996–2025).
| Month | Avg high | Avg low | Precip. | Days ≥1 mm | Sunshine / day |
|---|---|---|---|---|---|
| January | 4.9°C | -9.3°C | 21.5 mm | 5.2 | 8.3 h |
| February | 6.0°C | -8.8°C | 24.2 mm | 6.1 | 9.3 h |
| March | 11.2°C | -4.5°C | 46.6 mm | 7.7 | 10.3 h |
| April | 15.2°C | -0.0°C | 63.1 mm | 9.0 | 11.0 h |
| May | 20.4°C | 5.6°C | 82.2 mm | 11.1 | 12.1 h |
| June | 27.3°C | 11.7°C | 46.2 mm | 7.5 | 12.9 h |
| July | 30.6°C | 15.4°C | 36.3 mm | 6.7 | 13.0 h |
| August | 29.3°C | 14.5°C | 37.7 mm | 6.5 | 12.3 h |
| September | 25.5°C | 10.2°C | 34.3 mm | 5.4 | 11.0 h |
| October | 17.9°C | 3.1°C | 37.2 mm | 5.5 | 9.6 h |
| November | 10.8°C | -3.7°C | 23.6 mm | 5.1 | 8.7 h |
| December | 5.4°C | -8.5°C | 21.2 mm | 4.7 | 8.0 h |
Record high 1996–2025: 38.7°C on 2025-06-21. Record low: -36.5°C on 2024-01-16.
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Grid cell 39.75, -105.02 at 1599 m. For snowfall, humidity and a best-time-to-visit score, open Denver in the climate tool.