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Monthly climate in Alamosa, Colorado, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Alamosa features a cold semi-arid climate (BSk).Temperatures typically range between -6 °C (22 °F) and 20 °C (68 °F) through the year, but rarely can drop to -28 °C (-19 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 290 mm (11.4 inches) and receives 60 rainy days on the 1 mm (0.04 inches) threshold annually.Alamosa enjoys an average of 3616 hours of sunshine throughout the year, and daylight varies from 9 hours 36 minutes to 14 hours 41 minutes per day.

Monthly average temperatures in Alamosa, Colorado, United States §

The warmest months in Alamosa are June, July and August, with daily mean temperatures ranging from 18 to 20 °C (65 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -3 °C (22 - 26 °F) throughout the day. On average each year, Alamosa experiences 81 days above 25 °C (77.0 °F) and 169 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Alamosa, 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 15°C
(59°F)		 18°C
(65°F)		 21°C
(70°F)		 24°C
(76°F)		 29°C
(85°F)		 33°C
(92°F)		 34°C
(93°F)		 32°C
(90°F)		 31°C
(88°F)		 26°C
(78°F)		 20°C
(68°F)		 14°C
(58°F)
Mean maximum 8°C
(47°F)		 12°C
(53°F)		 18°C
(66°F)		 22°C
(72°F)		 26°C
(80°F)		 30°C
(87°F)		 33°C
(92°F)		 31°C
(87°F)		 30°C
(87°F)		 24°C
(76°F)		 16°C
(61°F)		 11°C
(52°F)
Average high 2°C
(36°F)		 4°C
(40°F)		 10°C
(51°F)		 15°C
(60°F)		 21°C
(69°F)		 27°C
(80°F)		 29°C
(84°F)		 28°C
(82°F)		 24°C
(76°F)		 16°C
(62°F)		 10°C
(51°F)		 4°C
(39°F)
Daily mean -6°C
(22°F)		 -3°C
(26°F)		 3°C
(37°F)		 7°C
(45°F)		 12°C
(54°F)		 18°C
(65°F)		 20°C
(68°F)		 19°C
(66°F)		 15°C
(60°F)		 8°C
(47°F)		 2°C
(36°F)		 -4°C
(26°F)
Average low -13°C
(8°F)		 -10°C
(14°F)		 -4°C
(25°F)		 -1°C
(31°F)		 3°C
(38°F)		 9°C
(48°F)		 12°C
(53°F)		 10°C
(51°F)		 7°C
(45°F)		 0°C
(32°F)		 -5°C
(24°F)		 -11°C
(13°F)
Mean minimum -24°C
(-10°F)		 -21°C
(-6°F)		 -13°C
(8°F)		 -8°C
(18°F)		 -3°C
(27°F)		 3°C
(38°F)		 8°C
(46°F)		 7°C
(45°F)		 0°C
(33°F)		 -10°C
(13°F)		 -13°C
(8°F)		 -21°C
(-6°F)
Minimum -27°C
(-16°F)		 -28°C
(-19°F)		 -17°C
(1°F)		 -15°C
(6°F)		 -5°C
(24°F)		 -0°C
(32°F)		 6°C
(44°F)		 7°C
(44°F)		 -4°C
(25°F)		 -20°C
(-3°F)		 -21°C
(-5°F)		 -26°C
(-14°F)

Compare climate in Alamosa with other places

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

Monthly average precipitation in Alamosa, Colorado, United States §

Alamosa usually has the most precipitation in May, July and August, with an average of 6 rainy days and 32 mm (1.3 inches) of precipitation per month.The driest months in Alamosa are January, February and November. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Alamosa, 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) 19 (0.8) 19 (0.7) 26 (1.0) 25 (1.0) 32 (1.3) 22 (0.9) 34 (1.3) 29 (1.2) 29 (1.1) 22 (0.9) 14 (0.6) 19 (0.8)
Average precipitation days (≥ 1 mm) 5 5 5 5 5 6 9 6 4 4 2 4

Monthly sunshine hours in Alamosa, Colorado, United States §

The sunniest months in Alamosa are May, June and July, when the sun shines an average of 11 hours 46 minutes a day.Least sunny months in Alamosa: January, February and December receive an average of 7 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Alamosa, 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 199 249 303 321 356 363 363 348 313 286 261 249
Mean daily daylight hours 9h 54m 10h 48m 11h 59m 13h 11m 14h 11m 14h 41m 14h 25m 13h 31m 12h 22m 11h 10m 10h 8m 9h 36m

Solar UV radiation in Alamosa, Colorado, United States §

Alamosa experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 13 - 13, 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 Alamosa UV Index data.

Average daily maximum UV levels by month for Alamosa, 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 11 13 13 13 12 10 8 5 4