Denver Climate — Average Highs, Lows & Rainfall by Month
Denver has a temperate climate with four distinct seasons. Daytime temperatures average 32°C / 90°F in July, the warmest month, and drop to 4°C / 38°F in January, the coldest. Overnight lows in January average -10°C / 13°F. Denver receives about 432 mm of rain a year across roughly 77 wet days, with May the wettest month.
Averages for 2021–2025 · Open-Meteo Historical Weather API (ERA5 reanalysis) · Updated 2026-10-05
Monthly averages in Denver
Average daytime high, overnight low and rainfall for each month of the year.
| Month | Avg high | Avg low | Rainfall | Wet days |
|---|---|---|---|---|
| January | 4°C / 38°F | -10°C / 13°F | 21 mm | 5 |
| February | 6°C / 42°F | -10°C / 14°F | 30 mm | 6 |
| March | 11°C / 52°F | -4°C / 24°F | 51 mm | 9 |
| April | 17°C / 62°F | 1°C / 33°F | 39 mm | 6 |
| May | 21°C / 70°F | 6°C / 43°F | 89 mm | 12 |
| June | 29°C / 84°F | 13°C / 55°F | 53 mm | 8 |
| July | 32°C / 90°F | 16°C / 61°F | 30 mm | 6 |
| August | 31°C / 88°F | 16°C / 60°F | 37 mm | 8 |
| September | 28°C / 83°F | 11°C / 52°F | 26 mm | 5 |
| October | 20°C / 69°F | 5°C / 40°F | 21 mm | 4 |
| November | 12°C / 54°F | -2°C / 28°F | 18 mm | 4 |
| December | 9°C / 48°F | -5°C / 24°F | 17 mm | 4 |
Best time to visit Denver
September, August, June offer the most comfortable weather in Denver: mild daytime temperatures with the year's lowest rainfall — September averages 28°C (83°F); August averages 31°C (88°F); June averages 29°C (84°F).
Denver climate FAQ
- What is the hottest month in Denver?
- July is the hottest month in Denver, with average daytime highs of 32°C / 90°F and overnight lows of 16°C / 61°F (averages for 2021–2025).
- What is the coldest month in Denver?
- January is the coldest month in Denver, with average highs of 4°C / 38°F and lows of -10°C / 13°F.
- How much rain does Denver get a year?
- Denver receives about 432 mm of rainfall a year, spread over roughly 77 wet days. May is the wettest month (89 mm on average) and December the driest (17 mm).
- When is the best time to visit Denver?
- September, August, June are the most comfortable months in Denver: mild daytime temperatures with the least rainfall of the year.
Want today's conditions instead of averages?
See live weather in Denver →Source: Open-Meteo Historical Weather API (ERA5 reanalysis), Open-Meteo. Averages are daily means across 2021–2025 and are rounded for display — for a live forecast see the Denver weather page.