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Monthly climate in Belle Fourche, South Dakota, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Belle Fourche features a cold semi-arid climate (BSk).Temperatures typically range between -6 °C (22 °F) and 24 °C (75 °F) through the year, but rarely can drop to -31 °C (-23 °F) or can rise to as high as 42 °C (108 °F).The average annual precipitation amounts to about 452 mm (17.8 inches) and receives 81 rainy days on the 1 mm (0.04 inches) threshold annually.Belle Fourche enjoys an average of 3261 hours of sunshine throughout the year, and daylight varies from 8 hours 51 minutes to 15 hours 29 minutes per day.

Monthly average temperatures in Belle Fourche, South Dakota, United States §

The warmest months in Belle Fourche are June, July and August, with daily mean temperatures ranging from 21 to 24 °C (69 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -1 °C (22 - 30 °F) throughout the day. On average each year, Belle Fourche experiences 83 days above 25 °C (77.0 °F) and 142 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Belle Fourche, South Dakota, 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)		 20°C
(69°F)		 23°C
(73°F)		 27°C
(81°F)		 32°C
(90°F)		 39°C
(102°F)		 42°C
(108°F)		 40°C
(104°F)		 39°C
(102°F)		 33°C
(91°F)		 26°C
(78°F)		 22°C
(72°F)
Mean maximum 12°C
(54°F)		 14°C
(58°F)		 20°C
(68°F)		 25°C
(78°F)		 30°C
(87°F)		 33°C
(91°F)		 38°C
(100°F)		 37°C
(99°F)		 35°C
(95°F)		 28°C
(84°F)		 21°C
(71°F)		 17°C
(62°F)
Average high 2°C
(36°F)		 -0°C
(32°F)		 8°C
(47°F)		 13°C
(55°F)		 19°C
(66°F)		 27°C
(81°F)		 31°C
(88°F)		 29°C
(85°F)		 24°C
(76°F)		 14°C
(57°F)		 9°C
(49°F)		 4°C
(40°F)
Daily mean -4°C
(26°F)		 -6°C
(22°F)		 2°C
(36°F)		 6°C
(43°F)		 13°C
(55°F)		 21°C
(69°F)		 24°C
(75°F)		 22°C
(72°F)		 17°C
(63°F)		 8°C
(46°F)		 3°C
(38°F)		 -1°C
(30°F)
Average low -8°C
(17°F)		 -11°C
(12°F)		 -4°C
(25°F)		 -0°C
(32°F)		 6°C
(44°F)		 13°C
(57°F)		 17°C
(62°F)		 14°C
(58°F)		 10°C
(51°F)		 2°C
(36°F)		 -3°C
(28°F)		 -6°C
(22°F)
Mean minimum -24°C
(-11°F)		 -24°C
(-11°F)		 -15°C
(6°F)		 -9°C
(15°F)		 -1°C
(31°F)		 8°C
(46°F)		 11°C
(53°F)		 8°C
(47°F)		 3°C
(37°F)		 -10°C
(15°F)		 -12°C
(12°F)		 -16°C
(4°F)
Minimum -31°C
(-23°F)		 -29°C
(-20°F)		 -26°C
(-15°F)		 -16°C
(3°F)		 -4°C
(26°F)		 6°C
(43°F)		 10°C
(51°F)		 6°C
(44°F)		 -1°C
(31°F)		 -23°C
(-8°F)		 -17°C
(2°F)		 -25°C
(-13°F)

Compare climate in Belle Fourche with other places

Compare temperature, precipitation, sunshine, UV index in Belle Fourche, South Dakota, United States with other places around the world.

Monthly average precipitation in Belle Fourche, South Dakota, United States §

Belle Fourche usually has the most precipitation in April, May and July, with an average of 9 rainy days and 63 mm (2.5 inches) of precipitation per month.The driest months in Belle Fourche are January, November and December. On average, 16 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Belle Fourche, South Dakota, 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) 14 (0.6) 25 (1.0) 28 (1.1) 59 (2.3) 69 (2.7) 44 (1.7) 60 (2.4) 36 (1.4) 33 (1.3) 49 (1.9) 13 (0.5) 22 (0.8)
Average precipitation days (≥ 1 mm) 4 7 7 9 11 8 8 5 6 8 3 5

Monthly sunshine hours in Belle Fourche, South Dakota, United States §

The sunniest months in Belle Fourche are June, July and August, when the sun shines an average of 12 hours 10 minutes a day.Least sunny months in Belle Fourche: January, February and December receive an average of 6 hours 14 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Belle Fourche, South Dakota, 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 162 208 256 277 306 378 383 357 286 234 214 197
Mean daily daylight hours 9h 14m 10h 26m 11h 57m 13h 31m 14h 50m 15h 29m 15h 7m 13h 57m 12h 27m 10h 54m 9h 33m 8h 51m

Solar UV radiation in Belle Fourche, South Dakota, United States §

Belle Fourche experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 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 Belle Fourche UV Index data.

Average daily maximum UV levels by month for Belle Fourche, South Dakota, 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 9 9 10 10 10 8 5 3 2