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Monthly climate in Missoula, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Missoula features a humid continental climate (Dfb).Temperatures typically range between -5 °C (23 °F) and 22 °C (71 °F) through the year, but rarely can drop to -31 °C (-23 °F) or can rise to as high as 39 °C (102 °F).The average annual precipitation amounts to about 608 mm (23.9 inches) and receives 127 rainy days on the 1 mm (0.04 inches) threshold annually.Missoula enjoys an average of 2970 hours of sunshine throughout the year, and daylight varies from 8 hours 34 minutes to 15 hours 47 minutes per day.

Monthly average temperatures in Missoula, Montana, United States §

The warmest months in Missoula are June, July and August, with daily mean temperatures ranging from 16 to 22 °C (61 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -2 °C (23 - 29 °F) throughout the day. On average each year, Missoula experiences 63 days above 25 °C (77.0 °F) and 154 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Missoula, 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 8°C
(46°F)		 15°C
(60°F)		 19°C
(66°F)		 26°C
(80°F)		 31°C
(87°F)		 38°C
(100°F)		 39°C
(102°F)		 38°C
(101°F)		 35°C
(95°F)		 27°C
(82°F)		 17°C
(63°F)		 16°C
(61°F)
Mean maximum 6°C
(44°F)		 10°C
(50°F)		 15°C
(60°F)		 22°C
(71°F)		 27°C
(81°F)		 29°C
(85°F)		 36°C
(97°F)		 36°C
(97°F)		 33°C
(91°F)		 23°C
(74°F)		 14°C
(57°F)		 10°C
(51°F)
Average high 1°C
(34°F)		 -0°C
(32°F)		 7°C
(45°F)		 11°C
(52°F)		 17°C
(63°F)		 23°C
(73°F)		 30°C
(86°F)		 29°C
(84°F)		 22°C
(72°F)		 12°C
(54°F)		 6°C
(43°F)		 2°C
(35°F)
Daily mean -3°C
(26°F)		 -5°C
(23°F)		 1°C
(35°F)		 5°C
(42°F)		 11°C
(52°F)		 16°C
(61°F)		 22°C
(71°F)		 20°C
(69°F)		 15°C
(58°F)		 6°C
(43°F)		 1°C
(35°F)		 -2°C
(29°F)
Average low -7°C
(20°F)		 -10°C
(15°F)		 -4°C
(26°F)		 -1°C
(31°F)		 5°C
(41°F)		 9°C
(49°F)		 13°C
(55°F)		 12°C
(54°F)		 7°C
(45°F)		 0°C
(33°F)		 -2°C
(28°F)		 -5°C
(23°F)
Mean minimum -18°C
(1°F)		 -23°C
(-10°F)		 -15°C
(6°F)		 -7°C
(20°F)		 -2°C
(28°F)		 2°C
(36°F)		 7°C
(45°F)		 7°C
(45°F)		 -0°C
(32°F)		 -10°C
(14°F)		 -10°C
(14°F)		 -16°C
(4°F)
Minimum -26°C
(-15°F)		 -31°C
(-23°F)		 -25°C
(-13°F)		 -10°C
(14°F)		 -4°C
(24°F)		 -0°C
(32°F)		 4°C
(40°F)		 4°C
(40°F)		 -2°C
(28°F)		 -23°C
(-9°F)		 -14°C
(6°F)		 -24°C
(-10°F)

Compare climate in Missoula with other places

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

Monthly average precipitation in Missoula, Montana, United States §

Missoula usually has the most precipitation in February, April and May, with an average of 15 rainy days and 73 mm (2.9 inches) of precipitation per month.The driest months in Missoula are July, August and September. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Missoula, 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) 39 (1.5) 86 (3.4) 49 (1.9) 68 (2.7) 65 (2.6) 64 (2.5) 13 (0.5) 18 (0.7) 27 (1.1) 60 (2.4) 55 (2.2) 63 (2.5)
Average precipitation days (≥ 1 mm) 11 18 12 15 12 11 3 3 6 11 12 13

Monthly sunshine hours in Missoula, Montana, United States §

The sunniest months in Missoula are June, July and August, when the sun shines an average of 11 hours 53 minutes a day.Least sunny months in Missoula: January, February and December receive an average of 4 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Missoula, 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 120 143 240 262 310 340 402 351 274 219 164 140
Mean daily daylight hours 9h 0m 10h 18m 11h 57m 13h 38m 15h 4m 15h 47m 15h 23m 14h 6m 12h 29m 10h 49m 9h 20m 8h 34m

Solar UV radiation in Missoula, Montana, United States §

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

Average daily maximum UV levels by month for Missoula, 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 6 8 9 10 10 9 8 5 3 2