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Monthly climate in Aspen, Colorado, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Aspen features a subarctic climate (Dfc).Temperatures typically range between -9 °C (15 °F) and 14 °C (57 °F) through the year, but rarely can drop to -30 °C (-21 °F) or can rise to as high as 26 °C (78 °F).The average annual precipitation amounts to about 695 mm (27.4 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Aspen enjoys an average of 3587 hours of sunshine throughout the year, and daylight varies from 9 hours 26 minutes to 14 hours 51 minutes per day.

Monthly average temperatures in Aspen, Colorado, United States §

The warmest months in Aspen are June, July and August, with daily mean temperatures ranging from 10 to 14 °C (50 - 57 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -8 °C (15 - 18 °F) throughout the day. On average each year, Aspen experiences 0 days above 25 °C (77.0 °F) and 235 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Aspen, Colorado, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 5°C
(42°F)		 10°C
(50°F)		 11°C
(51°F)		 11°C
(53°F)		 18°C
(64°F)		 25°C
(78°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 19°C
(66°F)		 11°C
(53°F)		 7°C
(45°F)
Mean maximum 3°C
(38°F)		 5°C
(41°F)		 8°C
(48°F)		 11°C
(52°F)		 15°C
(59°F)		 20°C
(69°F)		 25°C
(77°F)		 23°C
(74°F)		 23°C
(74°F)		 16°C
(61°F)		 8°C
(47°F)		 5°C
(41°F)
Average high -3°C
(26°F)		 -3°C
(27°F)		 2°C
(36°F)		 5°C
(41°F)		 9°C
(49°F)		 17°C
(63°F)		 21°C
(70°F)		 20°C
(69°F)		 17°C
(63°F)		 8°C
(46°F)		 2°C
(36°F)		 -3°C
(27°F)
Daily mean -9°C
(16°F)		 -8°C
(18°F)		 -4°C
(26°F)		 -1°C
(31°F)		 3°C
(38°F)		 10°C
(50°F)		 14°C
(57°F)		 13°C
(55°F)		 9°C
(49°F)		 1°C
(34°F)		 -6°C
(22°F)		 -9°C
(15°F)
Average low -14°C
(8°F)		 -13°C
(9°F)		 -9°C
(16°F)		 -6°C
(21°F)		 -3°C
(27°F)		 1°C
(35°F)		 6°C
(43°F)		 5°C
(42°F)		 2°C
(36°F)		 -6°C
(22°F)		 -13°C
(9°F)		 -15°C
(5°F)
Mean minimum -23°C
(-8°F)		 -22°C
(-8°F)		 -18°C
(1°F)		 -16°C
(4°F)		 -8°C
(18°F)		 -4°C
(25°F)		 0°C
(33°F)		 2°C
(36°F)		 -5°C
(24°F)		 -20°C
(-5°F)		 -24°C
(-11°F)		 -26°C
(-14°F)
Minimum -23°C
(-10°F)		 -25°C
(-13°F)		 -21°C
(-6°F)		 -19°C
(-2°F)		 -12°C
(11°F)		 -7°C
(21°F)		 -1°C
(30°F)		 0°C
(33°F)		 -7°C
(19°F)		 -30°C
(-21°F)		 -28°C
(-18°F)		 -29°C
(-20°F)

Compare climate in Aspen with other places

Compare temperature, precipitation, sunshine, UV index in Aspen, Colorado, United States with other places around the world.

Monthly average precipitation in Aspen, Colorado, United States §

Aspen usually has the most precipitation in February, March and April, with an average of 14 rainy days and 77 mm (3.0 inches) of precipitation per month.The driest months in Aspen are June, August and September. On average, 35 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Aspen, Colorado, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 59 (2.3) 78 (3.1) 82 (3.2) 72 (2.8) 62 (2.4) 33 (1.3) 60 (2.4) 37 (1.5) 35 (1.4) 62 (2.4) 52 (2.1) 65 (2.6)
Average precipitation days (≥ 1 mm) 11 15 14 13 12 6 12 8 7 10 9 12

Monthly sunshine hours in Aspen, Colorado, United States §

The sunniest months in Aspen are May, June and July, when the sun shines an average of 12 hours 22 minutes a day.Least sunny months in Aspen: January, February and December receive an average of 6 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Aspen, Colorado, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 174 226 289 323 365 385 386 360 317 285 246 225
Mean daily daylight hours 9h 45m 10h 44m 11h 58m 13h 15m 14h 20m 14h 51m 14h 34m 13h 36m 12h 23m 11h 6m 10h 0m 9h 26m

Solar UV radiation in Aspen, Colorado, United States §

Aspen experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 13 - 15, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Aspen UV Index data.

Average daily maximum UV levels by month for Aspen, Colorado, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 6 10 12 13 15 13 12 11 7 5 4