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Monthly climate in Altona, Colorado, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Altona features a cold semi-arid climate (BSk).Temperatures typically range between -4 °C (26 °F) and 20 °C (68 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 721 mm (28.4 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Altona enjoys an average of 3502 hours of sunshine throughout the year, and daylight varies from 9 hours 21 minutes to 14 hours 57 minutes per day.

Monthly average temperatures in Altona, Colorado, United States §

The warmest months in Altona are June, July and August, with daily mean temperatures ranging from 17 to 20 °C (63 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (26 - 30 °F) throughout the day. On average each year, Altona experiences 67 days above 25 °C (77.0 °F) and 159 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Altona, 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 14°C
(57°F)		 20°C
(68°F)		 21°C
(70°F)		 24°C
(75°F)		 27°C
(81°F)		 34°C
(93°F)		 34°C
(93°F)		 32°C
(91°F)		 34°C
(93°F)		 26°C
(79°F)		 22°C
(71°F)		 19°C
(67°F)
Mean maximum 11°C
(52°F)		 14°C
(58°F)		 18°C
(65°F)		 22°C
(72°F)		 25°C
(78°F)		 29°C
(84°F)		 33°C
(91°F)		 31°C
(89°F)		 32°C
(90°F)		 24°C
(76°F)		 19°C
(66°F)		 14°C
(57°F)
Average high 3°C
(38°F)		 3°C
(38°F)		 9°C
(48°F)		 13°C
(55°F)		 17°C
(63°F)		 25°C
(76°F)		 27°C
(82°F)		 27°C
(80°F)		 24°C
(75°F)		 14°C
(58°F)		 10°C
(49°F)		 5°C
(41°F)
Daily mean -3°C
(27°F)		 -4°C
(26°F)		 2°C
(35°F)		 5°C
(42°F)		 10°C
(50°F)		 17°C
(63°F)		 20°C
(68°F)		 19°C
(67°F)		 16°C
(61°F)		 7°C
(45°F)		 2°C
(36°F)		 -1°C
(30°F)
Average low -8°C
(17°F)		 -9°C
(15°F)		 -4°C
(24°F)		 -1°C
(30°F)		 3°C
(39°F)		 9°C
(49°F)		 13°C
(55°F)		 12°C
(54°F)		 8°C
(47°F)		 0°C
(33°F)		 -3°C
(26°F)		 -7°C
(20°F)
Mean minimum -20°C
(-4°F)		 -22°C
(-8°F)		 -16°C
(4°F)		 -10°C
(14°F)		 -3°C
(26°F)		 4°C
(39°F)		 8°C
(47°F)		 9°C
(48°F)		 1°C
(35°F)		 -13°C
(9°F)		 -11°C
(12°F)		 -16°C
(4°F)
Minimum -25°C
(-13°F)		 -25°C
(-13°F)		 -22°C
(-7°F)		 -16°C
(3°F)		 -8°C
(17°F)		 2°C
(36°F)		 7°C
(44°F)		 7°C
(45°F)		 -3°C
(26°F)		 -20°C
(-4°F)		 -16°C
(4°F)		 -18°C
(-0°F)

Compare climate in Altona with other places

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

Monthly average precipitation in Altona, Colorado, United States §

Altona usually has the most precipitation in May, July and August, with an average of 17 rainy days and 102 mm (4.0 inches) of precipitation per month.The driest months in Altona are January, November and December. On average, 25 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Altona, 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) 25 (1.0) 37 (1.5) 64 (2.5) 69 (2.7) 136 (5.4) 80 (3.2) 89 (3.5) 81 (3.2) 42 (1.7) 47 (1.9) 30 (1.2) 21 (0.8)
Average precipitation days (≥ 1 mm) 5 9 11 12 18 15 18 15 9 7 6 4

Monthly sunshine hours in Altona, Colorado, United States §

The sunniest months in Altona are June, July and August, when the sun shines an average of 12 hours 1 minutes a day.Least sunny months in Altona: January, February and December receive an average of 7 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Altona, 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 185 234 285 300 326 373 381 351 306 272 248 237
Mean daily daylight hours 9h 40m 10h 41m 11h 58m 13h 18m 14h 25m 14h 57m 14h 39m 13h 40m 12h 23m 11h 5m 9h 56m 9h 21m

Solar UV radiation in Altona, Colorado, United States §

Altona experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 11 - 12, 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 4. For more detailed information, check out our hourly Altona UV Index data.

Average daily maximum UV levels by month for Altona, 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 8 11 11 12 12 11 9 6 4 3