Denver Weather Averages

Denver, Colorado basks in plenty of sunshine and infrequent precipitation year round. Yet the snow season here is among the longest for major USA cities, sometimes extending from September to May.

This page gives detailed information on the annual weather averages for Denver. You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered in the Denver community of Stapleton.

Temperature

64 °F	annual average high	18 °C
36 °F	annual average low	2 °C

Denver's coldest day of the year usually occurs in mid December when the daily maximum temperature averages 43 degrees Fahrenheit (6 degrees Celsius) and the minimum averages 16 °F (-9 °C).

The year's hottest days are normally in mid July. The average temperature peaks then with daily highs of 89 °F (32 °C) and nighttime lows of 60 °F (15 °C).

155 days	70 °F maximum or above (21 °C)
157 days	32 °F minimum or below (0 °C)

Denver averages 31 days a year when the thermometer reaches into the 90s °F (over 32 °C). The temperature briefly climbs above 100 °F (38 °C) every year or two. Typically on 21 days annually the mercury remains below freezing for the entire day.

The thermometer dips to 10 °F (-12 °C) or below on 20 nights a year. About a third of those see the temperature descend to 0 °F (-18 °C) or even colder.

Precipitation

15.6 inches	total yearly precipitation	396 millimetres
87 days	of rain or snowfall

May is usually the wettest month of the year in Denver, while January and February are the driest.

Snow

53.8 inches	total snowfall a year	136.7 centimetres
33 days	with new snow

Most years, it snows in Denver from October to April. It's not unusual though, for May or September to also get some snow.

The snow accumulated on the ground amounts to an inch (2.5 cm) or more on 46 days annually but usually just one or two days top 10 inches (25 cm).

Sun

69 %	sunshine annually
115 days	with clear skies

The sun's rays reach the ground in Denver during 69 percent of daylight hours on average year round, for a total of 3073 hours annually. Typically on 115 days a year the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in Denver averages 12 hours and 12 minutes a day. The shortest days of the year in mid December have 9 hours and 21 minutes of daylight. The year's longest days in mid June last 14:59 from sunrise to sunset.

Humidity

52 %	average humidity

The annual average for relative humidity in Denver ranges throughout the day from 67 percent at 5:00 am to 34 percent at 2:00 pm.

Local Time	2 am	5 am	8 am	11 am	2 pm	5 pm	8 pm	11 pm
Humidity %	65	67	56	40	34	40	53	61

Wind

8.7 mph

wind speed average

14.0 kph

April is usually the windiest month for Denver, while the wind is calmest during October.

Storms

2 days	precipitation of 1 inch (25 mm) or more
2 days	snowfall of 5 inches (13 cm) or more
41 days	with thunderstorms a year

Denver averages 16 days a year when it snows at least an inch (2.5 cm). In some years, one of those days produces 10 inches (25 cm) or more of new snow.

Thunderstorms usually appear over Denver from April to October.