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Monthly climate in Choteau, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Choteau features a cold semi-arid climate (BSk).Temperatures typically range between -8 °C (18 °F) and 20 °C (69 °F) through the year, but rarely can drop to -39 °C (-37 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 472 mm (18.6 inches) and receives 87 rainy days on the 1 mm (0.04 inches) threshold annually.Choteau enjoys an average of 3088 hours of sunshine throughout the year, and daylight varies from 8 hours 27 minutes to 15 hours 56 minutes per day.

Monthly average temperatures in Choteau, Montana, United States §

The warmest months in Choteau are June, July and August, with daily mean temperatures ranging from 16 to 20 °C (61 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -8 to -3 °C (18 - 27 °F) throughout the day. On average each year, Choteau experiences 56 days above 25 °C (77.0 °F) and 154 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Choteau, Montana, 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 12°C
(54°F)		 15°C
(60°F)		 20°C
(68°F)		 26°C
(79°F)		 28°C
(83°F)		 35°C
(96°F)		 36°C
(96°F)		 38°C
(100°F)		 33°C
(92°F)		 28°C
(83°F)		 20°C
(68°F)		 18°C
(65°F)
Mean maximum 9°C
(48°F)		 10°C
(51°F)		 16°C
(61°F)		 22°C
(72°F)		 26°C
(80°F)		 29°C
(84°F)		 35°C
(94°F)		 35°C
(94°F)		 31°C
(88°F)		 24°C
(75°F)		 17°C
(62°F)		 13°C
(56°F)
Average high 0°C
(33°F)		 -3°C
(27°F)		 5°C
(42°F)		 10°C
(51°F)		 17°C
(62°F)		 22°C
(73°F)		 28°C
(83°F)		 27°C
(81°F)		 21°C
(70°F)		 12°C
(53°F)		 6°C
(43°F)		 2°C
(35°F)
Daily mean -4°C
(24°F)		 -8°C
(18°F)		 -0°C
(31°F)		 4°C
(40°F)		 11°C
(52°F)		 16°C
(61°F)		 20°C
(69°F)		 19°C
(67°F)		 13°C
(57°F)		 5°C
(42°F)		 1°C
(34°F)		 -3°C
(27°F)
Average low -9°C
(16°F)		 -13°C
(10°F)		 -6°C
(22°F)		 -2°C
(29°F)		 4°C
(40°F)		 9°C
(48°F)		 11°C
(53°F)		 11°C
(52°F)		 7°C
(45°F)		 -0°C
(32°F)		 -3°C
(26°F)		 -7°C
(20°F)
Mean minimum -25°C
(-13°F)		 -27°C
(-17°F)		 -18°C
(-1°F)		 -11°C
(13°F)		 -2°C
(28°F)		 4°C
(40°F)		 6°C
(43°F)		 5°C
(41°F)		 -1°C
(30°F)		 -10°C
(14°F)		 -15°C
(5°F)		 -20°C
(-3°F)
Minimum -29°C
(-19°F)		 -39°C
(-37°F)		 -32°C
(-25°F)		 -17°C
(2°F)		 -6°C
(21°F)		 4°C
(39°F)		 4°C
(40°F)		 3°C
(38°F)		 -4°C
(25°F)		 -20°C
(-4°F)		 -20°C
(-3°F)		 -29°C
(-20°F)

Compare climate in Choteau with other places

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

Monthly average precipitation in Choteau, Montana, United States §

Choteau usually has the most precipitation in April, May and June, with an average of 9 rainy days and 71 mm (2.8 inches) of precipitation per month.The driest months in Choteau are January, July and August. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Choteau, Montana, 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) 16 (0.6) 40 (1.6) 27 (1.1) 57 (2.3) 82 (3.2) 73 (2.9) 14 (0.5) 23 (0.9) 43 (1.7) 38 (1.5) 30 (1.2) 28 (1.1)
Average precipitation days (≥ 1 mm) 4 10 8 10 11 8 4 4 6 7 7 8

Monthly sunshine hours in Choteau, Montana, United States §

The sunniest months in Choteau are June, July and August, when the sun shines an average of 11 hours 56 minutes a day.Least sunny months in Choteau: January, November and December receive an average of 5 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Choteau, Montana, 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 145 175 259 273 300 354 399 344 270 229 172 162
Mean daily daylight hours 8h 53m 10h 15m 11h 57m 13h 41m 15h 10m 15h 56m 15h 30m 14h 10m 12h 30m 10h 46m 9h 14m 8h 27m

Solar UV radiation in Choteau, Montana, United States §

Choteau experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Choteau UV Index data.

Average daily maximum UV levels by month for Choteau, Montana, 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) 2 4 5 8 9 10 10 9 8 5 3 2