WeatherArchive / Climate averages / Denver
Denver weather by month: climate averages
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.
Denver weather month by month
The wettest month in Denver is May, averaging 3.2 in (82 mm); the driest is December at 0.8 in (21 mm). May has the most days with at least 1 mm of rain (about 11). July is the sunniest month, with about 13.0 hours of sunshine a day, against 8.0 hours in December. If you like average highs between 64 °F and 82 °F (18–28 °C) with few rainy days, aim for May, June and September.
Planning a particular day? See how often that date was wet or hot over 30 years with the event weather odds, or look up what the weather actually was on any past date in the historical weather archive.
Questions people ask
What is the warmest month in Denver?
July, with an average daily high of 87°F (31°C) over 1996–2025.
What is the coldest month in Denver?
January, when nights average about 15°F (-9°C).
What is the rainiest month in Denver?
May has the most precipitation (about 3.2 in (82 mm)), and May has the most rainy days (about 11 days with 1 mm or more). The driest month is December.
How much sunshine does Denver get?
About 10.5 hours of bright sunshine a day averaged over the year, from 8.0 h in December to 13.0 h in July. Sunshine here is the model’s estimate of hours with direct sun, not hours of daylight.
What is the best month to visit Denver for mild weather?
By average high between 64 °F and 82 °F (18–28 °C) and the fewest rainy days: May, June, September. Prices, crowds and events are not included.