Best time to visit Denver

October is the best month in Denver, scoring 89 out of 100, with July the weakest at 47. The 42-point spread means timing is worth planning around without being decisive. 4 of the twelve months sit within ten points of the best, so there is more than one right answer.

July is the warmest month at 33.4 °C and December the coolest at 7.9 °C — a 25.5 °C spread across the year. Around 85 days a year top 30 °C, concentrated in July and the months either side. At the other end, 111 nights a year fall below freezing: the winter here is a real one.

There is a real wet season here. May, July and August carry the rain — up to 14 wet days in a month — while January, February, September, October, November and December drop as low as 5. That 9-day gap is the biggest single difference between a good month and a bad one in Denver, and it moves further than the temperature does.

Daylight runs from 9.4 hours in winter to 15 in summer, enough to notice on a sightseeing itinerary.

The three strongest months are October, September, May. The one to think twice about is July. Each month below has its own page with rainfall reliability, extremes, daylight and crowd levels.

Denver month by month