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Monthly climate in Corvallis, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Corvallis features a humid continental climate (Dfb).Temperatures typically range between -6 °C (22 °F) and 19 °C (66 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 676 mm (26.6 inches) and receives 135 rainy days on the 1 mm (0.04 inches) threshold annually.Corvallis enjoys an average of 2976 hours of sunshine throughout the year, and daylight varies from 8 hours 39 minutes to 15 hours 43 minutes per day.

Monthly average temperatures in Corvallis, Montana, United States §

The warmest months in Corvallis are June, July and August, with daily mean temperatures ranging from 14 to 19 °C (57 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -5 °C (22 - 23 °F) throughout the day. On average each year, Corvallis experiences 49 days above 25 °C (77.0 °F) and 181 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Corvallis, 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 6°C
(43°F)		 9°C
(48°F)		 13°C
(56°F)		 21°C
(70°F)		 27°C
(81°F)		 34°C
(93°F)		 34°C
(94°F)		 36°C
(97°F)		 33°C
(91°F)		 25°C
(77°F)		 16°C
(61°F)		 13°C
(56°F)
Mean maximum 4°C
(40°F)		 7°C
(45°F)		 12°C
(53°F)		 16°C
(62°F)		 24°C
(75°F)		 26°C
(80°F)		 33°C
(92°F)		 34°C
(93°F)		 31°C
(88°F)		 20°C
(69°F)		 11°C
(53°F)		 7°C
(44°F)
Average high -1°C
(30°F)		 -1°C
(30°F)		 5°C
(40°F)		 8°C
(46°F)		 15°C
(58°F)		 20°C
(69°F)		 27°C
(82°F)		 27°C
(80°F)		 20°C
(69°F)		 10°C
(51°F)		 3°C
(38°F)		 -1°C
(30°F)
Daily mean -5°C
(23°F)		 -5°C
(23°F)		 -0°C
(32°F)		 2°C
(36°F)		 8°C
(47°F)		 14°C
(57°F)		 19°C
(66°F)		 18°C
(65°F)		 13°C
(55°F)		 4°C
(39°F)		 -1°C
(30°F)		 -6°C
(22°F)
Average low -9°C
(17°F)		 -9°C
(16°F)		 -5°C
(24°F)		 -3°C
(27°F)		 2°C
(35°F)		 6°C
(44°F)		 9°C
(49°F)		 9°C
(49°F)		 5°C
(41°F)		 -2°C
(29°F)		 -6°C
(22°F)		 -10°C
(15°F)
Mean minimum -20°C
(-4°F)		 -21°C
(-6°F)		 -14°C
(7°F)		 -10°C
(13°F)		 -6°C
(22°F)		 0°C
(33°F)		 4°C
(39°F)		 4°C
(39°F)		 -3°C
(26°F)		 -14°C
(7°F)		 -18°C
(1°F)		 -21°C
(-5°F)
Minimum -29°C
(-20°F)		 -28°C
(-17°F)		 -21°C
(-5°F)		 -16°C
(3°F)		 -10°C
(14°F)		 -2°C
(29°F)		 1°C
(33°F)		 2°C
(36°F)		 -6°C
(22°F)		 -26°C
(-14°F)		 -21°C
(-5°F)		 -24°C
(-11°F)

Compare climate in Corvallis with other places

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

Monthly average precipitation in Corvallis, Montana, United States §

Corvallis usually has the most precipitation in February, May and June, with an average of 14 rainy days and 82 mm (3.2 inches) of precipitation per month.The driest months in Corvallis are July, August and September. On average, 24 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Corvallis, 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) 43 (1.7) 98 (3.9) 60 (2.4) 69 (2.7) 72 (2.8) 77 (3.0) 17 (0.7) 21 (0.8) 34 (1.3) 65 (2.5) 58 (2.3) 62 (2.5)
Average precipitation days (≥ 1 mm) 11 19 14 14 13 11 5 4 6 12 13 13

Monthly sunshine hours in Corvallis, Montana, United States §

The sunniest months in Corvallis are June, July and August, when the sun shines an average of 11 hours 46 minutes a day.Least sunny months in Corvallis: January, February and December receive an average of 4 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Corvallis, 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 124 147 240 262 308 334 398 350 274 218 172 146
Mean daily daylight hours 9h 4m 10h 20m 11h 57m 13h 36m 15h 0m 15h 43m 15h 19m 14h 3m 12h 28m 10h 50m 9h 23m 8h 39m

Solar UV radiation in Corvallis, Montana, United States §

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

Average daily maximum UV levels by month for Corvallis, 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) 3 4 6 8 10 10 10 9 8 5 3 2