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Monthly climate in Big Sandy, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Big Sandy features a cold semi-arid climate (BSk).Temperatures typically range between -9 °C (17 °F) and 23 °C (73 °F) through the year, but rarely can drop to -37 °C (-34 °F) or can rise to as high as 39 °C (103 °F).The average annual precipitation amounts to about 370 mm (14.6 inches) and receives 79 rainy days on the 1 mm (0.04 inches) threshold annually.Big Sandy enjoys an average of 3188 hours of sunshine throughout the year, and daylight varies from 8 hours 24 minutes to 15 hours 59 minutes per day.

Monthly average temperatures in Big Sandy, Montana, United States §

The warmest months in Big Sandy are June, July and August, with daily mean temperatures ranging from 18 to 23 °C (65 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -4 °C (17 - 26 °F) throughout the day. On average each year, Big Sandy experiences 64 days above 25 °C (77.0 °F) and 145 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Big Sandy, 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
(53°F)		 15°C
(60°F)		 21°C
(70°F)		 28°C
(83°F)		 32°C
(89°F)		 38°C
(102°F)		 38°C
(100°F)		 39°C
(103°F)		 34°C
(94°F)		 29°C
(85°F)		 22°C
(72°F)		 18°C
(65°F)
Mean maximum 10°C
(50°F)		 11°C
(51°F)		 16°C
(61°F)		 24°C
(76°F)		 28°C
(84°F)		 32°C
(89°F)		 37°C
(99°F)		 37°C
(99°F)		 33°C
(92°F)		 25°C
(78°F)		 17°C
(63°F)		 13°C
(55°F)
Average high -1°C
(31°F)		 -4°C
(25°F)		 5°C
(42°F)		 11°C
(52°F)		 18°C
(65°F)		 24°C
(76°F)		 30°C
(86°F)		 28°C
(83°F)		 21°C
(71°F)		 12°C
(54°F)		 6°C
(42°F)		 0°C
(33°F)
Daily mean -5°C
(23°F)		 -9°C
(17°F)		 -0°C
(32°F)		 5°C
(42°F)		 12°C
(55°F)		 18°C
(65°F)		 23°C
(73°F)		 21°C
(70°F)		 15°C
(59°F)		 6°C
(43°F)		 1°C
(34°F)		 -4°C
(26°F)
Average low -10°C
(15°F)		 -13°C
(8°F)		 -5°C
(23°F)		 -0°C
(32°F)		 6°C
(43°F)		 11°C
(53°F)		 14°C
(58°F)		 13°C
(56°F)		 9°C
(48°F)		 1°C
(34°F)		 -4°C
(25°F)		 -8°C
(18°F)
Mean minimum -28°C
(-18°F)		 -26°C
(-15°F)		 -19°C
(-2°F)		 -10°C
(15°F)		 -1°C
(31°F)		 5°C
(42°F)		 8°C
(47°F)		 6°C
(44°F)		 1°C
(33°F)		 -9°C
(16°F)		 -16°C
(4°F)		 -21°C
(-6°F)
Minimum -34°C
(-29°F)		 -33°C
(-28°F)		 -37°C
(-34°F)		 -20°C
(-3°F)		 -6°C
(22°F)		 4°C
(39°F)		 7°C
(45°F)		 4°C
(39°F)		 -1°C
(30°F)		 -17°C
(2°F)		 -25°C
(-12°F)		 -31°C
(-24°F)

Compare climate in Big Sandy with other places

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

Monthly average precipitation in Big Sandy, Montana, United States §

Big Sandy usually has the most precipitation in April, May and June, with an average of 9 rainy days and 50 mm (2.0 inches) of precipitation per month.The driest months in Big Sandy are January, March and July. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Big Sandy, 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) 15 (0.6) 35 (1.4) 21 (0.8) 37 (1.5) 57 (2.3) 56 (2.2) 9 (0.4) 23 (0.9) 31 (1.2) 31 (1.2) 34 (1.4) 22 (0.8)
Average precipitation days (≥ 1 mm) 4 8 6 9 9 10 3 4 6 6 8 6

Monthly sunshine hours in Big Sandy, Montana, United States §

The sunniest months in Big Sandy are June, July and August, when the sun shines an average of 12 hours 7 minutes a day.Least sunny months in Big Sandy: 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 Big Sandy, 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 152 186 268 272 326 363 402 349 273 236 184 174
Mean daily daylight hours 8h 50m 10h 13m 11h 57m 13h 42m 15h 13m 15h 59m 15h 33m 14h 12m 12h 30m 10h 45m 9h 12m 8h 24m

Solar UV radiation in Big Sandy, Montana, United States §

Big Sandy experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 9, 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 Big Sandy UV Index data.

Average daily maximum UV levels by month for Big Sandy, 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 7 8 9 9 9 7 5 3 2