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Monthly climate in Bonner-West Riverside, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Bonner-West Riverside features a humid continental climate (Dfb).Temperatures typically range between -6 °C (21 °F) and 20 °C (68 °F) through the year, but rarely can drop to -33 °C (-27 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 745 mm (29.3 inches) and receives 148 rainy days on the 1 mm (0.04 inches) threshold annually.Bonner-West Riverside enjoys an average of 2953 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 Bonner-West Riverside, Montana, United States §

The warmest months in Bonner-West Riverside are June, July and August, with daily mean temperatures ranging from 15 to 20 °C (59 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -3 °C (21 - 27 °F) throughout the day. On average each year, Bonner-West Riverside experiences 50 days above 25 °C (77.0 °F) and 167 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bonner-West Riverside, 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 7°C
(44°F)		 13°C
(56°F)		 18°C
(64°F)		 25°C
(77°F)		 28°C
(83°F)		 36°C
(97°F)		 36°C
(98°F)		 37°C
(99°F)		 32°C
(91°F)		 26°C
(79°F)		 15°C
(59°F)		 14°C
(58°F)
Mean maximum 5°C
(42°F)		 8°C
(47°F)		 14°C
(57°F)		 20°C
(69°F)		 25°C
(78°F)		 27°C
(82°F)		 34°C
(93°F)		 34°C
(94°F)		 31°C
(88°F)		 22°C
(71°F)		 12°C
(54°F)		 9°C
(48°F)
Average high -1°C
(31°F)		 -2°C
(29°F)		 5°C
(42°F)		 10°C
(50°F)		 16°C
(61°F)		 21°C
(70°F)		 28°C
(82°F)		 27°C
(80°F)		 20°C
(69°F)		 11°C
(52°F)		 4°C
(40°F)		 0°C
(33°F)
Daily mean -5°C
(24°F)		 -6°C
(21°F)		 0°C
(32°F)		 4°C
(39°F)		 10°C
(50°F)		 15°C
(59°F)		 20°C
(68°F)		 19°C
(67°F)		 13°C
(56°F)		 5°C
(41°F)		 0°C
(33°F)		 -3°C
(27°F)
Average low -8°C
(17°F)		 -11°C
(13°F)		 -5°C
(24°F)		 -1°C
(30°F)		 4°C
(39°F)		 8°C
(47°F)		 12°C
(53°F)		 11°C
(53°F)		 7°C
(44°F)		 -0°C
(32°F)		 -3°C
(26°F)		 -6°C
(21°F)
Mean minimum -19°C
(-2°F)		 -25°C
(-13°F)		 -16°C
(4°F)		 -8°C
(18°F)		 -3°C
(27°F)		 1°C
(34°F)		 6°C
(43°F)		 6°C
(43°F)		 -1°C
(30°F)		 -10°C
(14°F)		 -12°C
(11°F)		 -17°C
(2°F)
Minimum -28°C
(-18°F)		 -33°C
(-27°F)		 -27°C
(-16°F)		 -12°C
(11°F)		 -5°C
(24°F)		 -1°C
(31°F)		 3°C
(37°F)		 4°C
(40°F)		 -3°C
(26°F)		 -22°C
(-7°F)		 -16°C
(4°F)		 -27°C
(-17°F)

Compare climate in Bonner-West Riverside with other places

Compare temperature, precipitation, sunshine, UV index in Bonner-West Riverside, Montana, United States with other places around the world.

Monthly average precipitation in Bonner-West Riverside, Montana, United States §

Bonner-West Riverside usually has the most precipitation in February, April and May, with an average of 17 rainy days and 90 mm (3.5 inches) of precipitation per month.The driest months in Bonner-West Riverside are July, August and September. On average, 28 mm (1.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bonner-West Riverside, 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) 48 (1.9) 98 (3.8) 59 (2.3) 84 (3.3) 88 (3.5) 74 (2.9) 19 (0.8) 27 (1.1) 37 (1.5) 70 (2.8) 71 (2.8) 70 (2.7)
Average precipitation days (≥ 1 mm) 12 19 14 17 17 12 5 5 7 12 13 15

Monthly sunshine hours in Bonner-West Riverside, Montana, United States §

The sunniest months in Bonner-West Riverside are June, July and August, when the sun shines an average of 11 hours 59 minutes a day.Least sunny months in Bonner-West Riverside: January, February and December receive an average of 4 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Bonner-West Riverside, 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 113 139 237 263 309 345 405 352 276 219 158 132
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 Bonner-West Riverside, Montana, United States §

Bonner-West Riverside 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 Bonner-West Riverside UV Index data.

Average daily maximum UV levels by month for Bonner-West Riverside, 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 7 9 10 10 9 8 5 3 2