Best time to visit Denver
The best months to visit Denver are September, May and October, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
September, May and October score best for Denver weather:
- May22° / 6°CMay is mild but unsettled, good for museums, gardens, and lower foothill trails between storms.
- September26° / 10°CSeptember is clear and comfortable, strong for Boulder, Golden, and city patios.
- October19° / 3°COctober brings fall color and first-snow risk, especially for mountain road trips.
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By TripSapien Research · Updated May 20, 2026
Denver weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight |
|---|---|---|---|---|---|
| January | 7° | -7° | 10 | 4 | 10h |
| February | 8° | -7° | 10 | 6 | 11h |
| March | 13° | -2° | 22 | 6 | 12h |
| April | 17° | 1° | 43 | 9 | 13h |
| MayBest weather | 22° | 6° | 55 | 10 | 14h |
| June | 29° | 12° | 49 | 8 | 15h |
| July | 32° | 16° | 54 | 8 | 15h |
| August | 31° | 15° | 40 | 8 | 14h |
| SeptemberBest weather | 26° | 10° | 34 | 6 | 12h |
| OctoberBest weather | 19° | 3° | 25 | 5 | 11h |
| November | 12° | -3° | 16 | 5 | 10h |
| December | 7° | -8° | 9 | 4 | 9h |
Temperatures in °C. Long-term monthly averages.
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Denver month by month
January
Denver in January: 7°C high, -7.4°C low, 10mm rain over 4 days, 9.5h daylight. Cold and clearer — short daylight but skies open.
February
Denver in February: 7.6°C high, -6.8°C low, 10mm rain over 6 days, 10.5h daylight. Mild and dry — shoulder-season sweet spot.
March
Denver in March: 13.2°C high, -2.5°C low, 22mm rain over 6 days, 11.7h daylight. Mild and dry — shoulder-season sweet spot.
April
Denver in April: 16.5°C high, 1.1°C low, 43mm rain over 9 days, 13.1h daylight. Mild and dry — shoulder-season sweet spot.
MayBest weather
Denver in May: 21.8°C high, 6.4°C low, 55mm rain over 10 days, 14.2h daylight. Mild and dry — shoulder-season sweet spot.
June
Denver in June: 28.6°C high, 11.7°C low, 49mm rain over 8 days, 14.8h daylight. Hot and dry — outdoor friendly, hydrate.
July
Denver in July: 32.2°C high, 15.7°C low, 54mm rain over 8 days, 14.6h daylight. Hot and dry — outdoor friendly, hydrate.
August
Denver in August: 30.8°C high, 14.6°C low, 40mm rain over 8 days, 13.6h daylight. Hot and dry — outdoor friendly, hydrate.
SeptemberBest weather
Denver in September: 26.4°C high, 10°C low, 34mm rain over 6 days, 12.2h daylight. Mild and dry — shoulder-season sweet spot.
OctoberBest weather
Denver in October: 18.5°C high, 2.8°C low, 25mm rain over 5 days, 10.9h daylight. Mild and dry — shoulder-season sweet spot.
November
Denver in November: 11.6°C high, -3.3°C low, 16mm rain over 5 days, 9.8h daylight. Mild and dry — shoulder-season sweet spot.
December
Denver in December: 6.7°C high, -7.6°C low, 9mm rain over 4 days, 9.2h daylight. Cold and clearer — short daylight but skies open.
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