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 temperature, precipitation, snow, sun, humidity, wind and storm averages for Denver.

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

Temperature Weather iconTemperature

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 max. or more (21 °C)
157 days 32 °F min. or less (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.

Rainy Weather iconPrecipitation

15.6 in total precipitation 396 mm
87 days of rain or snowfall

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

Snowy Weather iconSnow

53.8 in total snowfall 136.7 cm
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).

Sunny Weather iconSun

69 % sunshine
115 days 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.

Humid Weather iconHumidity

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 Time2 am5 am8 am11 am2 pm5 pm8 pm11 pm
Humidity % 65 67 56 40 34 40 53 61

Windy Weather iconWind

8.7 mph wind speed average 14.0 kph

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

Stormy Weather iconStorms

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.

Reference

These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.

Denver Weather
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