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Monthly climate in Circle, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Circle features a cold semi-arid climate (BSk).Temperatures typically range between -10 °C (15 °F) and 23 °C (74 °F) through the year, but rarely can drop to -37 °C (-33 °F) or can rise to as high as 40 °C (104 °F).The average annual precipitation amounts to about 394 mm (15.5 inches) and receives 66 rainy days on the 1 mm (0.04 inches) threshold annually.Circle enjoys an average of 3146 hours of sunshine throughout the year, and daylight varies from 8 hours 30 minutes to 15 hours 52 minutes per day.

Monthly average temperatures in Circle, Montana, United States §

The warmest months in Circle are June, July and August, with daily mean temperatures ranging from 19 to 23 °C (67 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -5 °C (15 - 24 °F) throughout the day. On average each year, Circle experiences 70 days above 25 °C (77.0 °F) and 153 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Circle, 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 11°C
(52°F)		 17°C
(63°F)		 21°C
(70°F)		 26°C
(80°F)		 33°C
(92°F)		 37°C
(100°F)		 39°C
(103°F)		 40°C
(104°F)		 36°C
(97°F)		 31°C
(89°F)		 23°C
(74°F)		 20°C
(68°F)
Mean maximum 9°C
(48°F)		 11°C
(52°F)		 18°C
(64°F)		 24°C
(75°F)		 29°C
(85°F)		 31°C
(89°F)		 36°C
(97°F)		 37°C
(99°F)		 33°C
(92°F)		 26°C
(79°F)		 17°C
(63°F)		 13°C
(55°F)
Average high -3°C
(28°F)		 -5°C
(24°F)		 5°C
(42°F)		 11°C
(52°F)		 19°C
(66°F)		 26°C
(78°F)		 30°C
(86°F)		 28°C
(83°F)		 22°C
(72°F)		 12°C
(54°F)		 5°C
(42°F)		 -0°C
(32°F)
Daily mean -7°C
(20°F)		 -10°C
(15°F)		 -0°C
(32°F)		 5°C
(42°F)		 13°C
(55°F)		 19°C
(67°F)		 23°C
(74°F)		 21°C
(71°F)		 15°C
(60°F)		 6°C
(44°F)		 0°C
(33°F)		 -5°C
(24°F)
Average low -11°C
(12°F)		 -14°C
(7°F)		 -5°C
(23°F)		 -1°C
(31°F)		 7°C
(44°F)		 13°C
(55°F)		 16°C
(61°F)		 14°C
(58°F)		 9°C
(49°F)		 1°C
(34°F)		 -4°C
(24°F)		 -9°C
(16°F)
Mean minimum -29°C
(-20°F)		 -28°C
(-19°F)		 -18°C
(-1°F)		 -11°C
(12°F)		 -0°C
(32°F)		 7°C
(45°F)		 10°C
(50°F)		 8°C
(48°F)		 0°C
(33°F)		 -9°C
(16°F)		 -16°C
(4°F)		 -23°C
(-9°F)
Minimum -37°C
(-33°F)		 -35°C
(-31°F)		 -29°C
(-19°F)		 -16°C
(3°F)		 -4°C
(25°F)		 6°C
(43°F)		 6°C
(43°F)		 7°C
(45°F)		 -2°C
(28°F)		 -17°C
(2°F)		 -20°C
(-4°F)		 -33°C
(-27°F)

Compare climate in Circle with other places

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

Monthly average precipitation in Circle, Montana, United States §

Circle usually has the most precipitation in May, June and September, with an average of 7 rainy days and 60 mm (2.3 inches) of precipitation per month.The driest months in Circle are January, March and December. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Circle, 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) 12 (0.5) 27 (1.1) 20 (0.8) 29 (1.1) 43 (1.7) 77 (3.0) 30 (1.2) 28 (1.1) 59 (2.3) 28 (1.1) 21 (0.8) 20 (0.8)
Average precipitation days (≥ 1 mm) 3 6 5 7 8 8 5 4 5 5 5 5

Monthly sunshine hours in Circle, Montana, United States §

The sunniest months in Circle are June, July and August, when the sun shines an average of 11 hours 54 minutes a day.Least sunny months in Circle: January, November and December receive an average of 5 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Circle, 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 145 196 249 274 324 366 390 338 270 224 188 176
Mean daily daylight hours 8h 56m 10h 16m 11h 57m 13h 40m 15h 8m 15h 52m 15h 27m 14h 8m 12h 29m 10h 47m 9h 17m 8h 30m

Solar UV radiation in Circle, Montana, United States §

Circle experiences the highest level of ultraviolet (UV) radiation in April, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, February 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 Circle UV Index data.

Average daily maximum UV levels by month for Circle, 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 3 5 9 8 10 9 9 8 5 3 2