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Monthly climate in Washington, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Washington features a humid continental climate (Dfb).Temperatures typically range between -5 °C (23 °F) and 20 °C (68 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 29 °C (84 °F).The average annual precipitation amounts to about 923 mm (36.3 inches) and receives 119 rainy days on the 1 mm (0.04 inches) threshold annually.Washington enjoys an average of 2915 hours of sunshine throughout the year, and daylight varies from 8 hours 46 minutes to 15 hours 35 minutes per day.

Monthly average temperatures in Washington, Wisconsin, United States §

The warmest months in Washington are July, August and September, with daily mean temperatures ranging from 17 to 20 °C (62 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -5 to -1 °C (23 - 30 °F) throughout the day. On average each year, Washington experiences 2 days above 25 °C (77.0 °F) and 114 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Washington, 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 4°C
(40°F)		 6°C
(43°F)		 7°C
(44°F)		 8°C
(47°F)		 17°C
(62°F)		 24°C
(75°F)		 29°C
(84°F)		 26°C
(78°F)		 23°C
(74°F)		 20°C
(68°F)		 13°C
(56°F)		 11°C
(51°F)
Mean maximum 3°C
(37°F)		 4°C
(39°F)		 5°C
(42°F)		 7°C
(46°F)		 14°C
(58°F)		 20°C
(68°F)		 26°C
(79°F)		 25°C
(76°F)		 22°C
(72°F)		 19°C
(66°F)		 10°C
(51°F)		 7°C
(45°F)
Average high -2°C
(28°F)		 -2°C
(28°F)		 1°C
(34°F)		 4°C
(39°F)		 9°C
(48°F)		 16°C
(61°F)		 22°C
(71°F)		 22°C
(71°F)		 18°C
(65°F)		 12°C
(55°F)		 5°C
(42°F)		 1°C
(34°F)
Daily mean -5°C
(24°F)		 -5°C
(23°F)		 -1°C
(30°F)		 2°C
(36°F)		 7°C
(45°F)		 14°C
(57°F)		 20°C
(68°F)		 20°C
(68°F)		 17°C
(62°F)		 11°C
(51°F)		 3°C
(38°F)		 -1°C
(30°F)
Average low -7°C
(21°F)		 -8°C
(19°F)		 -3°C
(26°F)		 1°C
(33°F)		 6°C
(43°F)		 12°C
(55°F)		 18°C
(65°F)		 18°C
(65°F)		 15°C
(60°F)		 9°C
(49°F)		 2°C
(35°F)		 -3°C
(27°F)
Mean minimum -15°C
(6°F)		 -16°C
(3°F)		 -11°C
(12°F)		 -4°C
(24°F)		 1°C
(34°F)		 9°C
(48°F)		 15°C
(59°F)		 15°C
(59°F)		 10°C
(51°F)		 3°C
(38°F)		 -5°C
(24°F)		 -12°C
(10°F)
Minimum -19°C
(-1°F)		 -20°C
(-4°F)		 -19°C
(-2°F)		 -8°C
(19°F)		 -1°C
(31°F)		 6°C
(43°F)		 13°C
(56°F)		 14°C
(57°F)		 7°C
(45°F)		 1°C
(34°F)		 -7°C
(20°F)		 -19°C
(-1°F)

Compare climate in Washington with other places

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

Monthly average precipitation in Washington, Wisconsin, United States §

Washington usually has the most precipitation in April, June and October, with an average of 12 rainy days and 98 mm (3.9 inches) of precipitation per month.The driest months in Washington are January, February and March. On average, 54 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Washington, 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) 44 (1.7) 56 (2.2) 61 (2.4) 90 (3.5) 83 (3.3) 90 (3.5) 76 (3.0) 87 (3.4) 85 (3.4) 114 (4.5) 67 (2.6) 70 (2.8)
Average precipitation days (≥ 1 mm) 8 9 9 11 9 11 9 9 10 14 10 10

Monthly sunshine hours in Washington, Wisconsin, United States §

The sunniest months in Washington are June, July and August, when the sun shines an average of 11 hours 15 minutes a day.Least sunny months in Washington: January, November and December receive an average of 4 hours 27 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Washington, 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 113 188 244 244 307 342 363 330 276 207 162 135
Mean daily daylight hours 9h 9m 10h 24m 11h 57m 13h 33m 14h 54m 15h 35m 15h 13m 14h 0m 12h 28m 10h 53m 9h 29m 8h 46m

Solar UV radiation in Washington, Wisconsin, United States §

Washington experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 9 - 9, 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 Washington UV Index data.

Average daily maximum UV levels by month for Washington, 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 7 9 9 9 8 7 5 3 2