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Monthly climate in Waterloo, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Waterloo features a humid continental climate (Dfb).Temperatures typically range between -6 °C (22 °F) and 23 °C (75 °F) through the year, but rarely can drop to -32 °C (-25 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1002 mm (39.5 inches) and receives 119 rainy days on the 1 mm (0.04 inches) threshold annually.Waterloo enjoys an average of 2896 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 19 minutes per day.

Monthly average temperatures in Waterloo, Wisconsin, United States §

The warmest months in Waterloo are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -2 °C (22 - 29 °F) throughout the day. On average each year, Waterloo experiences 74 days above 25 °C (77.0 °F) and 127 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Waterloo, 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 11°C
(52°F)		 20°C
(68°F)		 21°C
(71°F)		 27°C
(80°F)		 34°C
(93°F)		 34°C
(93°F)		 35°C
(95°F)		 33°C
(92°F)		 33°C
(92°F)		 30°C
(86°F)		 23°C
(74°F)		 18°C
(65°F)
Mean maximum 8°C
(46°F)		 12°C
(53°F)		 17°C
(63°F)		 24°C
(76°F)		 31°C
(87°F)		 32°C
(90°F)		 33°C
(92°F)		 31°C
(88°F)		 30°C
(86°F)		 28°C
(83°F)		 17°C
(63°F)		 14°C
(57°F)
Average high -2°C
(28°F)		 -1°C
(31°F)		 7°C
(44°F)		 12°C
(55°F)		 20°C
(68°F)		 26°C
(79°F)		 28°C
(83°F)		 27°C
(80°F)		 23°C
(74°F)		 15°C
(60°F)		 6°C
(44°F)		 2°C
(36°F)
Daily mean -6°C
(22°F)		 -5°C
(22°F)		 2°C
(36°F)		 8°C
(46°F)		 15°C
(59°F)		 21°C
(70°F)		 23°C
(75°F)		 22°C
(71°F)		 18°C
(65°F)		 11°C
(51°F)		 2°C
(37°F)		 -2°C
(29°F)
Average low -10°C
(14°F)		 -10°C
(14°F)		 -3°C
(27°F)		 3°C
(37°F)		 10°C
(51°F)		 16°C
(61°F)		 19°C
(66°F)		 17°C
(62°F)		 13°C
(56°F)		 6°C
(44°F)		 -2°C
(30°F)		 -5°C
(23°F)
Mean minimum -24°C
(-11°F)		 -24°C
(-11°F)		 -16°C
(4°F)		 -5°C
(23°F)		 1°C
(35°F)		 11°C
(52°F)		 13°C
(56°F)		 11°C
(52°F)		 6°C
(43°F)		 -3°C
(26°F)		 -10°C
(14°F)		 -15°C
(5°F)
Minimum -32°C
(-25°F)		 -32°C
(-25°F)		 -24°C
(-11°F)		 -9°C
(17°F)		 -1°C
(30°F)		 7°C
(45°F)		 12°C
(54°F)		 8°C
(46°F)		 2°C
(35°F)		 -5°C
(23°F)		 -15°C
(5°F)		 -22°C
(-7°F)

Compare climate in Waterloo with other places

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

Monthly average precipitation in Waterloo, Wisconsin, United States §

Waterloo usually has the most precipitation in May, June and October, with an average of 12 rainy days and 118 mm (4.6 inches) of precipitation per month.The driest months in Waterloo are February, November and December. On average, 46 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Waterloo, 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) 51 (2.0) 51 (2.0) 57 (2.3) 100 (4.0) 125 (4.9) 114 (4.5) 102 (4.0) 96 (3.8) 102 (4.0) 115 (4.5) 43 (1.7) 46 (1.8)
Average precipitation days (≥ 1 mm) 7 9 9 12 13 12 10 11 9 13 7 7

Monthly sunshine hours in Waterloo, Wisconsin, United States §

The sunniest months in Waterloo are June, July and August, when the sun shines an average of 10 hours 57 minutes a day.Least sunny months in Waterloo: January, November and December receive an average of 5 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Waterloo, 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 127 194 231 238 268 323 354 331 264 202 184 175
Mean daily daylight hours 9h 22m 10h 31m 11h 57m 13h 26m 14h 42m 15h 19m 14h 59m 13h 51m 12h 26m 10h 57m 9h 40m 9h 0m

Solar UV radiation in Waterloo, Wisconsin, United States §

Waterloo 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 Waterloo UV Index data.

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