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Monthly climate in Fort Benton, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Fort Benton features a cold semi-arid climate (BSk).Temperatures typically range between -7 °C (19 °F) and 23 °C (74 °F) through the year, but rarely can drop to -38 °C (-36 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 398 mm (15.7 inches) and receives 83 rainy days on the 1 mm (0.04 inches) threshold annually.Fort Benton enjoys an average of 3072 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 Fort Benton, Montana, United States §

The warmest months in Fort Benton are June, July and August, with daily mean temperatures ranging from 19 to 23 °C (66 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -2 °C (19 - 29 °F) throughout the day. On average each year, Fort Benton experiences 74 days above 25 °C (77.0 °F) and 125 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fort Benton, 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 13°C
(55°F)		 18°C
(64°F)		 22°C
(72°F)		 30°C
(86°F)		 32°C
(91°F)		 40°C
(103°F)		 39°C
(102°F)		 40°C
(105°F)		 36°C
(97°F)		 31°C
(88°F)		 23°C
(73°F)		 19°C
(66°F)
Mean maximum 11°C
(52°F)		 13°C
(55°F)		 18°C
(64°F)		 26°C
(78°F)		 29°C
(85°F)		 32°C
(90°F)		 38°C
(100°F)		 37°C
(100°F)		 34°C
(93°F)		 27°C
(81°F)		 19°C
(66°F)		 15°C
(59°F)
Average high 1°C
(35°F)		 -3°C
(28°F)		 7°C
(44°F)		 12°C
(54°F)		 19°C
(66°F)		 25°C
(77°F)		 31°C
(88°F)		 29°C
(85°F)		 23°C
(73°F)		 13°C
(56°F)		 8°C
(46°F)		 3°C
(37°F)
Daily mean -3°C
(27°F)		 -7°C
(19°F)		 1°C
(34°F)		 6°C
(43°F)		 13°C
(56°F)		 19°C
(66°F)		 23°C
(74°F)		 22°C
(71°F)		 16°C
(60°F)		 7°C
(45°F)		 3°C
(38°F)		 -2°C
(29°F)
Average low -7°C
(19°F)		 -12°C
(11°F)		 -4°C
(25°F)		 1°C
(34°F)		 7°C
(45°F)		 12°C
(54°F)		 15°C
(59°F)		 14°C
(58°F)		 9°C
(49°F)		 2°C
(36°F)		 -2°C
(29°F)		 -6°C
(22°F)
Mean minimum -26°C
(-15°F)		 -26°C
(-15°F)		 -17°C
(2°F)		 -10°C
(13°F)		 0°C
(32°F)		 7°C
(44°F)		 9°C
(49°F)		 8°C
(46°F)		 1°C
(34°F)		 -9°C
(17°F)		 -13°C
(8°F)		 -19°C
(-3°F)
Minimum -31°C
(-24°F)		 -38°C
(-36°F)		 -33°C
(-27°F)		 -17°C
(1°F)		 -5°C
(22°F)		 5°C
(41°F)		 8°C
(47°F)		 5°C
(41°F)		 -1°C
(30°F)		 -16°C
(3°F)		 -17°C
(1°F)		 -29°C
(-20°F)

Compare climate in Fort Benton with other places

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

Monthly average precipitation in Fort Benton, Montana, United States §

Fort Benton usually has the most precipitation in April, May and June, with an average of 9 rainy days and 55 mm (2.2 inches) of precipitation per month.The driest months in Fort Benton are January, July and August. On average, 16 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fort Benton, 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) 17 (0.7) 41 (1.6) 23 (0.9) 53 (2.1) 56 (2.2) 56 (2.2) 13 (0.5) 18 (0.7) 30 (1.2) 33 (1.3) 31 (1.2) 26 (1.0)
Average precipitation days (≥ 1 mm) 4 11 6 11 9 9 3 4 6 7 7 6

Monthly sunshine hours in Fort Benton, Montana, United States §

The sunniest months in Fort Benton are June, July and August, when the sun shines an average of 11 hours 56 minutes a day.Least sunny months in Fort Benton: January, November and December receive an average of 5 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Fort Benton, 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 146 172 256 260 309 354 396 346 266 227 169 162
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 Fort Benton, Montana, United States §

Fort Benton experiences the highest level of ultraviolet (UV) radiation in May, 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, 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 Fort Benton UV Index data.

Average daily maximum UV levels by month for Fort Benton, 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 7 9 10 9 9 7 5 3 2