Denver weather by month & the best time to visit
United States · major city break · semi-arid climate
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The best time to visit Denver is September — its sunniest month (Sunshine Score 92/100), with June and August close behind. Denver averages about 3,169 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 34 mm of rain in September.
When is the best time to visit Denver?
For sunshine, the best time to visit Denver is September, then June and August. The dullest month is January (0/100, 14 mm of rain). The full month-by-month picture is in the table below.
How sunny is Denver?
Denver is one of the sunniest places on Earth: about 3,169 hours of sunshine a year. 92 Sunshine Score points separate September (92) from January (0), so the month you pick matters. It ranks #64 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 415 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 5° / 41°F | -7° / 19°F | 14 mm | 2 |
| February | 0 | 6° / 43°F | -7° / 19°F | 17 mm | 3 |
| March | 38 | 13° / 55°F | -3° / 27°F | 30 mm | 5 |
| April | 67 | 17° / 63°F | 1° / 34°F | 48 mm | 7 |
| May | 86 | 22° / 72°F | 6° / 43°F | 64 mm | 8 |
| June | 89 | 30° / 86°F | 13° / 55°F | 47 mm | 9 |
| July | 79 | 33° / 91°F | 17° / 63°F | 53 mm | 10 |
| August | 89 | 31° / 88°F | 15° / 59°F | 46 mm | 9 |
| September | 92 | 26° / 79°F | 10° / 50°F | 34 mm | 7 |
| October | 77 | 18° / 64°F | 2° / 36°F | 29 mm | 5 |
| November | 24 | 11° / 52°F | -3° / 27°F | 17 mm | 3 |
| December | 0 | 4° / 39°F | -7° / 19°F | 16 mm | 2 |
Nearest destinations
Head-to-head
How Denver compares month by month: Denver vs Colorado Springs · Denver vs Rapid City · Denver vs Aspen · Denver vs Eagle · all comparisons
Denver: questions and answers
What kind of destination is Denver?
Denver is a major city break in United States at 1,633 m elevation with a semi-arid climate.
How many hours of sunshine does Denver get a year?
Denver gets about 3,169 hours of sunshine a year, at its best around September.
When is the best time to visit Denver?
The sunniest time to visit Denver is September, when the Sunshine Score peaks at 92/100 (with June and August close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Denver?
January is the least sunny month in Denver, scoring 0/100 with about 14 mm of rain.
How strong is the sun in Denver?
The typical midday UV index in Denver peaks around 10 (very high) in July, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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