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Monthly climate in Hysham, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Hysham features a cold semi-arid climate (BSk).Temperatures typically range between -7 °C (19 °F) and 25 °C (77 °F) through the year, but rarely can drop to -36 °C (-33 °F) or can rise to as high as 42 °C (108 °F).The average annual precipitation amounts to about 415 mm (16.3 inches) and receives 83 rainy days on the 1 mm (0.04 inches) threshold annually.Hysham enjoys an average of 3157 hours of sunshine throughout the year, and daylight varies from 8 hours 39 minutes to 15 hours 42 minutes per day.

Monthly average temperatures in Hysham, Montana, United States §

The warmest months in Hysham are June, July and August, with daily mean temperatures ranging from 20 to 25 °C (69 - 77 °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, Hysham experiences 83 days above 25 °C (77.0 °F) and 135 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hysham, 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 14°C
(57°F)		 17°C
(64°F)		 25°C
(77°F)		 28°C
(82°F)		 33°C
(92°F)		 42°C
(108°F)		 41°C
(107°F)		 40°C
(104°F)		 38°C
(101°F)		 32°C
(89°F)		 24°C
(76°F)		 21°C
(70°F)
Mean maximum 10°C
(50°F)		 14°C
(57°F)		 21°C
(69°F)		 27°C
(80°F)		 30°C
(86°F)		 33°C
(92°F)		 39°C
(102°F)		 38°C
(101°F)		 36°C
(96°F)		 27°C
(81°F)		 20°C
(68°F)		 15°C
(60°F)
Average high 0°C
(33°F)		 -2°C
(29°F)		 8°C
(46°F)		 13°C
(56°F)		 20°C
(68°F)		 27°C
(81°F)		 32°C
(90°F)		 31°C
(87°F)		 24°C
(75°F)		 14°C
(58°F)		 8°C
(47°F)		 3°C
(37°F)
Daily mean -5°C
(24°F)		 -7°C
(19°F)		 1°C
(35°F)		 7°C
(44°F)		 13°C
(57°F)		 20°C
(69°F)		 25°C
(77°F)		 23°C
(74°F)		 17°C
(63°F)		 8°C
(46°F)		 2°C
(37°F)		 -2°C
(29°F)
Average low -9°C
(16°F)		 -12°C
(10°F)		 -4°C
(25°F)		 1°C
(33°F)		 7°C
(45°F)		 13°C
(56°F)		 17°C
(63°F)		 16°C
(60°F)		 10°C
(51°F)		 2°C
(36°F)		 -3°C
(28°F)		 -6°C
(21°F)
Mean minimum -27°C
(-16°F)		 -28°C
(-18°F)		 -17°C
(2°F)		 -10°C
(14°F)		 1°C
(34°F)		 8°C
(46°F)		 11°C
(51°F)		 10°C
(49°F)		 3°C
(37°F)		 -8°C
(17°F)		 -14°C
(6°F)		 -19°C
(-1°F)
Minimum -34°C
(-30°F)		 -36°C
(-33°F)		 -33°C
(-26°F)		 -21°C
(-5°F)		 -1°C
(30°F)		 7°C
(44°F)		 7°C
(45°F)		 8°C
(46°F)		 2°C
(35°F)		 -19°C
(-1°F)		 -23°C
(-9°F)		 -29°C
(-21°F)

Compare climate in Hysham with other places

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

Monthly average precipitation in Hysham, Montana, United States §

Hysham usually has the most precipitation in April, May and June, with an average of 9 rainy days and 54 mm (2.1 inches) of precipitation per month.The driest months in Hysham are January, August and November. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hysham, 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) 33 (1.3) 30 (1.2) 54 (2.1) 51 (2.0) 58 (2.3) 26 (1.0) 21 (0.8) 43 (1.7) 34 (1.3) 23 (0.9) 24 (1.0)
Average precipitation days (≥ 1 mm) 5 9 8 10 8 9 5 5 5 7 6 6

Monthly sunshine hours in Hysham, Montana, United States §

The sunniest months in Hysham are June, July and August, when the sun shines an average of 11 hours 52 minutes a day.Least sunny months in Hysham: January, February and December receive an average of 5 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hysham, 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 147 192 255 267 317 362 390 339 272 228 199 184
Mean daily daylight hours 9h 4m 10h 20m 11h 57m 13h 36m 15h 0m 15h 42m 15h 19m 14h 3m 12h 28m 10h 50m 9h 23m 8h 39m

Solar UV radiation in Hysham, Montana, United States §

Hysham experiences the highest level of ultraviolet (UV) radiation in April, June and July, 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 Hysham UV Index data.

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