Colorado climate guide

Temperature in Colorado (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
43°F maximum daytime temperature in January in Colorado (Denver)43
46°F maximum daytime temperature in February in Colorado (Denver)46
52°F maximum daytime temperature in March in Colorado (Denver)52
63°F maximum daytime temperature in April in Colorado (Denver)63
72°F maximum daytime temperature in May in Colorado (Denver)72
81°F maximum daytime temperature in June in Colorado (Denver)81
88°F maximum daytime temperature in July in Colorado (Denver)88
86°F maximum daytime temperature in August in Colorado (Denver)86
77°F maximum daytime temperature in September in Colorado (Denver)77
66°F maximum daytime temperature in October in Colorado (Denver)66
54°F maximum daytime temperature in November in Colorado (Denver)54
45°F maximum daytime temperature in December in Colorado (Denver)45
Min temperature (night-time)
16°F minimum night-time temperature in January in Colorado (Denver)16
19°F minimum night-time temperature in February in Colorado (Denver)19
25°F minimum night-time temperature in March in Colorado (Denver)25
34°F minimum night-time temperature in April in Colorado (Denver)34
43°F minimum night-time temperature in May in Colorado (Denver)43
52°F minimum night-time temperature in June in Colorado (Denver)52
57°F minimum night-time temperature in July in Colorado (Denver)57
57°F minimum night-time temperature in August in Colorado (Denver)57
46°F minimum night-time temperature in September in Colorado (Denver)46
36°F minimum night-time temperature in October in Colorado (Denver)36
25°F minimum night-time temperature in November in Colorado (Denver)25
18°F minimum night-time temperature in December in Colorado (Denver)18

Sunshine & Daylight in Colorado

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Colorado (Denver)10
11 hours of daylight per day in February in Colorado (Denver)11
12 hours of daylight per day in March in Colorado (Denver)12
13 hours of daylight per day in April in Colorado (Denver)13
14 hours of daylight per day in May in Colorado (Denver)14
15 hours of daylight per day in June in Colorado (Denver)15
15 hours of daylight per day in July in Colorado (Denver)15
14 hours of daylight per day in August in Colorado (Denver)14
12 hours of daylight per day in September in Colorado (Denver)12
11 hours of daylight per day in October in Colorado (Denver)11
10 hours of daylight per day in November in Colorado (Denver)10
9 hours of daylight per day in December in Colorado (Denver)9

Rainfall in Colorado

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
6 days with some rainfall in January in Colorado (Denver)6
6 days with some rainfall in February in Colorado (Denver)6
9 days with some rainfall in March in Colorado (Denver)9
8 days with some rainfall in April in Colorado (Denver)8
10 days with some rainfall in May in Colorado (Denver)10
9 days with some rainfall in June in Colorado (Denver)9
9 days with some rainfall in July in Colorado (Denver)9
9 days with some rainfall in August in Colorado (Denver)9
7 days with some rainfall in September in Colorado (Denver)7
5 days with some rainfall in October in Colorado (Denver)5
6 days with some rainfall in November in Colorado (Denver)6
6 days with some rainfall in December in Colorado (Denver)6
Average monthly rainfall (inches)
0.5 inches monthly rainfall in January in Colorado (Denver)0.5
0.7 inches monthly rainfall in February in Colorado (Denver)0.7
1.3 inches monthly rainfall in March in Colorado (Denver)1.3
1.7 inches monthly rainfall in April in Colorado (Denver)1.7
2.8 inches monthly rainfall in May in Colorado (Denver)2.8
1.6 inches monthly rainfall in June in Colorado (Denver)1.6
2.1 inches monthly rainfall in July in Colorado (Denver)2.1
1.6 inches monthly rainfall in August in Colorado (Denver)1.6
1.2 inches monthly rainfall in September in Colorado (Denver)1.2
0.9 inches monthly rainfall in October in Colorado (Denver)0.9
0.9 inches monthly rainfall in November in Colorado (Denver)0.9
0.6 inches monthly rainfall in December in Colorado (Denver)0.6

More climate for Colorado

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Colorado (Denver)2
UV (maximum) index 3 (Moderate) in February in Colorado (Denver)3
UV (maximum) index 5 (Moderate) in March in Colorado (Denver)5
UV (maximum) index 7 (High) in April in Colorado (Denver)7
UV (maximum) index 9 (Very High) in May in Colorado (Denver)9
UV (maximum) index 10 (Very High) in June in Colorado (Denver)10
UV (maximum) index 11 (Extreme) in July in Colorado (Denver)11
UV (maximum) index 10 (Very High) in August in Colorado (Denver)10
UV (maximum) index 7 (High) in September in Colorado (Denver)7
UV (maximum) index 5 (Moderate) in October in Colorado (Denver)5
UV (maximum) index 3 (Moderate) in November in Colorado (Denver)3
UV (maximum) index 2 (Low) in December in Colorado (Denver)2
Heat & Humidity
No heat & humidity in January in Colorado (Denver)0
No heat & humidity in February in Colorado (Denver)0
No heat & humidity in March in Colorado (Denver)0
No heat & humidity in April in Colorado (Denver)0
No heat & humidity in May in Colorado (Denver)0
Low heat & humidity in June in Colorado (Denver)L
Moderate heat & humidity in July in Colorado (Denver)M
Moderate heat & humidity in August in Colorado (Denver)M
No heat & humidity in September in Colorado (Denver)0
No heat & humidity in October in Colorado (Denver)0
No heat & humidity in November in Colorado (Denver)0
No heat & humidity in December in Colorado (Denver)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Going to Colorado? Find the best month to visit Colorado based on the weather.

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Check climate guides for Colorado showing average temperature, rainfall & sunshine figures for each month of the year. The climate guide shown above is for Denver.

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More about Colorado

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The climate guide for Colorado, represented by Denver, shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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Colorado climate overview

The state of Colorado straddles the highest regions of the Rocky Mountains between Utah in the west and Kansas in the east. Colorado is famous for the rarefied air of its forested snow-covered mountains and has the highest average elevation of any state. It is also a land of great contrasts. In the west there is desert and in the east a vast rolling prairie.

The capital, Denver - 'Mile High City', is situated on the edge of this prairie where the mountains and the plains meet, with about half the state's population living in the surrounding area.

To the west of Denver mountains rise abruptly and extend westwards for over 160 kilometres (100 miles). Among the many ranges there are more than 1,000 peaks over 3,000 metres (10,000 ft), and some of the most famous ski resorts in the world such as Vail and Aspen.

Further west, the mountains give way to the rugged Colorado Plateau with broken tablelands, which over the years have become eroded by melt-waters off the mountains.

Colorado has an extreme climate with summer temperatures ranging from comfortable in the mountains to hot on the plains, and long cold winters almost everywhere.

In winter, mountain temperatures regularly fall below -18°C (0°F) and the eastern plains are occasionally affected by blizzard conditions when polar air masses collide with warmer moist air off the Gulf of Mexico. The plains are also particularly prone to severe thunderstorms in the spring and summer months.

Colorado's distance from the Pacific Ocean and the Gulf of Mexico means that rainfall levels are generally low. In winter precipitation falls almost entirely as snow, especially in the mountains, leading to abundant snow cover. For most of western Colorado rainfall levels are higher in winter than in summer, whereas in the east the opposite is true.

Throughout the state sunshine levels are high. Denver boasts an average of more than 60% of daylight hours with bright sunshine for every month of the year. Clear skies, spectacular scenery and cool mountain temperatures at the height of summer make Colorado a popular destination.

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