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Monthly climate in Onalaska, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Onalaska features a humid continental climate (Dfa).Temperatures typically range between -7 °C (19 °F) and 23 °C (74 °F) through the year, but rarely can drop to -35 °C (-31 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1059 mm (41.7 inches) and receives 118 rainy days on the 1 mm (0.04 inches) threshold annually.Onalaska enjoys an average of 2868 hours of sunshine throughout the year, and daylight varies from 8 hours 56 minutes to 15 hours 24 minutes per day.

Monthly average temperatures in Onalaska, Wisconsin, United States §

The warmest months in Onalaska are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -3 °C (19 - 26 °F) throughout the day. On average each year, Onalaska experiences 71 days above 25 °C (77.0 °F) and 133 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Onalaska, Wisconsin, 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
(49°F)		 17°C
(63°F)		 20°C
(69°F)		 27°C
(81°F)		 35°C
(96°F)		 35°C
(95°F)		 34°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)		 30°C
(86°F)		 23°C
(73°F)		 17°C
(64°F)
Mean maximum 6°C
(43°F)		 11°C
(52°F)		 16°C
(62°F)		 24°C
(75°F)		 31°C
(88°F)		 33°C
(91°F)		 33°C
(92°F)		 31°C
(88°F)		 30°C
(87°F)		 27°C
(81°F)		 16°C
(61°F)		 12°C
(54°F)
Average high -3°C
(26°F)		 -2°C
(29°F)		 6°C
(43°F)		 12°C
(54°F)		 20°C
(68°F)		 26°C
(80°F)		 28°C
(83°F)		 26°C
(79°F)		 23°C
(74°F)		 14°C
(58°F)		 5°C
(42°F)		 0°C
(33°F)
Daily mean -7°C
(19°F)		 -7°C
(20°F)		 2°C
(35°F)		 7°C
(45°F)		 15°C
(59°F)		 21°C
(71°F)		 23°C
(74°F)		 21°C
(70°F)		 18°C
(64°F)		 10°C
(50°F)		 2°C
(35°F)		 -3°C
(26°F)
Average low -12°C
(11°F)		 -12°C
(12°F)		 -2°C
(28°F)		 2°C
(36°F)		 10°C
(51°F)		 16°C
(62°F)		 18°C
(65°F)		 16°C
(62°F)		 13°C
(55°F)		 6°C
(43°F)		 -2°C
(28°F)		 -7°C
(19°F)
Mean minimum -26°C
(-14°F)		 -26°C
(-14°F)		 -14°C
(7°F)		 -6°C
(22°F)		 2°C
(36°F)		 11°C
(52°F)		 14°C
(57°F)		 11°C
(52°F)		 6°C
(43°F)		 -3°C
(26°F)		 -11°C
(12°F)		 -20°C
(-4°F)
Minimum -33°C
(-26°F)		 -35°C
(-31°F)		 -25°C
(-12°F)		 -11°C
(13°F)		 -0°C
(32°F)		 8°C
(47°F)		 12°C
(55°F)		 11°C
(51°F)		 3°C
(38°F)		 -6°C
(22°F)		 -15°C
(4°F)		 -24°C
(-11°F)

Compare climate in Onalaska with other places

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

Monthly average precipitation in Onalaska, Wisconsin, United States §

Onalaska usually has the most precipitation in May, June and August, with an average of 12 rainy days and 136 mm (5.3 inches) of precipitation per month.The driest months in Onalaska are January, February and December. On average, 43 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Onalaska, Wisconsin, 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) 35 (1.4) 49 (1.9) 57 (2.2) 86 (3.4) 142 (5.6) 139 (5.5) 101 (4.0) 127 (5.0) 109 (4.3) 118 (4.6) 53 (2.1) 44 (1.7)
Average precipitation days (≥ 1 mm) 7 7 8 11 14 13 11 11 10 12 7 7

Monthly sunshine hours in Onalaska, Wisconsin, United States §

The sunniest months in Onalaska are June, July and August, when the sun shines an average of 11 hours 0 minutes a day.Least sunny months in Onalaska: January, November and December receive an average of 5 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Onalaska, Wisconsin, 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 124 197 231 226 269 334 358 320 256 194 185 168
Mean daily daylight hours 9h 18m 10h 29m 11h 57m 13h 28m 14h 46m 15h 24m 15h 3m 13h 54m 12h 27m 10h 56m 9h 37m 8h 56m

Solar UV radiation in Onalaska, Wisconsin, United States §

Onalaska 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 Onalaska UV Index data.

Average daily maximum UV levels by month for Onalaska, Wisconsin, 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 5 8 9 10 10 9 7 5 3 2