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Monthly climate in Janesville, Minnesota, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Janesville features a humid continental climate (Dfa).Temperatures typically range between -9 °C (17 °F) and 23 °C (74 °F) through the year, but rarely can drop to -37 °C (-33 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1024 mm (40.3 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually.Janesville enjoys an average of 2971 hours of sunshine throughout the year, and daylight varies from 8 hours 55 minutes to 15 hours 25 minutes per day.

Monthly average temperatures in Janesville, Minnesota, United States §

The warmest months in Janesville are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (71 - 74 °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 - 25 °F) throughout the day. On average each year, Janesville experiences 76 days above 25 °C (77.0 °F) and 139 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Janesville, Minnesota, 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 9°C
(48°F)		 18°C
(65°F)		 24°C
(75°F)		 29°C
(84°F)		 36°C
(97°F)		 36°C
(97°F)		 35°C
(95°F)		 35°C
(96°F)		 33°C
(92°F)		 30°C
(87°F)		 25°C
(78°F)		 19°C
(66°F)
Mean maximum 6°C
(44°F)		 8°C
(47°F)		 18°C
(65°F)		 25°C
(77°F)		 31°C
(89°F)		 33°C
(91°F)		 34°C
(93°F)		 32°C
(89°F)		 32°C
(89°F)		 28°C
(82°F)		 18°C
(64°F)		 12°C
(54°F)
Average high -4°C
(25°F)		 -4°C
(25°F)		 6°C
(42°F)		 12°C
(54°F)		 21°C
(69°F)		 27°C
(81°F)		 28°C
(83°F)		 26°C
(80°F)		 24°C
(75°F)		 14°C
(58°F)		 6°C
(43°F)		 0°C
(32°F)
Daily mean -8°C
(17°F)		 -9°C
(17°F)		 1°C
(34°F)		 7°C
(45°F)		 15°C
(60°F)		 22°C
(72°F)		 23°C
(74°F)		 21°C
(71°F)		 18°C
(65°F)		 9°C
(49°F)		 1°C
(35°F)		 -4°C
(25°F)
Average low -12°C
(10°F)		 -14°C
(8°F)		 -3°C
(26°F)		 2°C
(35°F)		 10°C
(51°F)		 17°C
(62°F)		 18°C
(65°F)		 16°C
(62°F)		 13°C
(56°F)		 5°C
(41°F)		 -3°C
(26°F)		 -8°C
(18°F)
Mean minimum -27°C
(-16°F)		 -27°C
(-17°F)		 -17°C
(2°F)		 -8°C
(18°F)		 3°C
(37°F)		 11°C
(51°F)		 13°C
(56°F)		 10°C
(51°F)		 6°C
(42°F)		 -4°C
(25°F)		 -14°C
(7°F)		 -22°C
(-7°F)
Minimum -34°C
(-30°F)		 -37°C
(-33°F)		 -27°C
(-16°F)		 -15°C
(5°F)		 1°C
(33°F)		 8°C
(47°F)		 12°C
(54°F)		 10°C
(50°F)		 3°C
(37°F)		 -10°C
(15°F)		 -17°C
(2°F)		 -24°C
(-11°F)

Compare climate in Janesville with other places

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

Monthly average precipitation in Janesville, Minnesota, United States §

Janesville usually has the most precipitation in May, August and September, with an average of 11 rainy days and 132 mm (5.2 inches) of precipitation per month.The driest months in Janesville are January, February and November. On average, 37 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Janesville, Minnesota, 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) 34 (1.3) 41 (1.6) 68 (2.7) 91 (3.6) 140 (5.5) 118 (4.7) 103 (4.1) 119 (4.7) 137 (5.4) 93 (3.7) 36 (1.4) 44 (1.7)
Average precipitation days (≥ 1 mm) 5 7 7 10 14 11 10 12 9 10 7 5

Monthly sunshine hours in Janesville, Minnesota, United States §

The sunniest months in Janesville are June, July and August, when the sun shines an average of 11 hours 11 minutes a day.Least sunny months in Janesville: January, November and December receive an average of 5 hours 34 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Janesville, Minnesota, 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 139 202 231 240 281 338 363 327 255 216 188 185
Mean daily daylight hours 9h 17m 10h 28m 11h 57m 13h 29m 14h 46m 15h 25m 15h 4m 13h 54m 12h 27m 10h 56m 9h 36m 8h 55m

Solar UV radiation in Janesville, Minnesota, United States §

Janesville 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 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 Janesville UV Index data.

Average daily maximum UV levels by month for Janesville, Minnesota, 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 5 5 8 9 10 10 9 8 5 3 3