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Monthly climate in Mercer, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Mercer features a humid continental climate (Dfb).Temperatures typically range between -10 °C (14 °F) and 20 °C (69 °F) through the year, but rarely can drop to -33 °C (-27 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1034 mm (40.7 inches) and receives 136 rainy days on the 1 mm (0.04 inches) threshold annually.Mercer enjoys an average of 2675 hours of sunshine throughout the year, and daylight varies from 8 hours 40 minutes to 15 hours 41 minutes per day.

Monthly average temperatures in Mercer, Wisconsin, United States §

The warmest months in Mercer are June, July and August, with daily mean temperatures ranging from 18 to 20 °C (65 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -7 °C (14 - 20 °F) throughout the day. On average each year, Mercer experiences 46 days above 25 °C (77.0 °F) and 166 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mercer, 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 6°C
(43°F)		 11°C
(51°F)		 17°C
(63°F)		 27°C
(81°F)		 32°C
(89°F)		 34°C
(93°F)		 33°C
(92°F)		 32°C
(90°F)		 31°C
(87°F)		 26°C
(79°F)		 22°C
(73°F)		 13°C
(55°F)
Mean maximum 3°C
(38°F)		 5°C
(42°F)		 12°C
(54°F)		 20°C
(68°F)		 27°C
(82°F)		 31°C
(88°F)		 32°C
(90°F)		 30°C
(86°F)		 28°C
(83°F)		 24°C
(75°F)		 12°C
(54°F)		 8°C
(47°F)
Average high -6°C
(21°F)		 -6°C
(22°F)		 2°C
(36°F)		 8°C
(47°F)		 18°C
(64°F)		 24°C
(75°F)		 26°C
(79°F)		 24°C
(75°F)		 20°C
(68°F)		 11°C
(52°F)		 2°C
(35°F)		 -3°C
(26°F)
Daily mean -10°C
(14°F)		 -10°C
(14°F)		 -3°C
(27°F)		 3°C
(37°F)		 12°C
(54°F)		 18°C
(65°F)		 20°C
(69°F)		 18°C
(65°F)		 14°C
(58°F)		 7°C
(44°F)		 -2°C
(29°F)		 -7°C
(20°F)
Average low -14°C
(8°F)		 -15°C
(6°F)		 -8°C
(18°F)		 -2°C
(29°F)		 6°C
(44°F)		 13°C
(55°F)		 15°C
(59°F)		 13°C
(56°F)		 10°C
(49°F)		 3°C
(37°F)		 -5°C
(23°F)		 -10°C
(13°F)
Mean minimum -27°C
(-16°F)		 -26°C
(-15°F)		 -20°C
(-4°F)		 -11°C
(12°F)		 -2°C
(29°F)		 7°C
(46°F)		 9°C
(49°F)		 7°C
(45°F)		 2°C
(36°F)		 -6°C
(22°F)		 -14°C
(7°F)		 -24°C
(-11°F)
Minimum -31°C
(-23°F)		 -33°C
(-27°F)		 -27°C
(-16°F)		 -16°C
(3°F)		 -4°C
(24°F)		 3°C
(38°F)		 7°C
(44°F)		 6°C
(43°F)		 -2°C
(29°F)		 -9°C
(16°F)		 -17°C
(1°F)		 -31°C
(-24°F)

Compare climate in Mercer with other places

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

Monthly average precipitation in Mercer, Wisconsin, United States §

Mercer usually has the most precipitation in June, August and October, with an average of 13 rainy days and 122 mm (4.8 inches) of precipitation per month.The driest months in Mercer are January, February and March. On average, 47 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mercer, 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) 36 (1.4) 51 (2.0) 53 (2.1) 92 (3.6) 100 (3.9) 121 (4.8) 110 (4.3) 126 (5.0) 98 (3.9) 118 (4.7) 58 (2.3) 70 (2.8)
Average precipitation days (≥ 1 mm) 9 10 8 13 10 13 10 13 13 15 11 11

Monthly sunshine hours in Mercer, Wisconsin, United States §

The sunniest months in Mercer are June, July and August, when the sun shines an average of 10 hours 57 minutes a day.Least sunny months in Mercer: January, November and December receive an average of 3 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mercer, 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 90 164 220 220 288 343 354 310 256 182 135 108
Mean daily daylight hours 9h 4m 10h 21m 11h 57m 13h 35m 14h 59m 15h 41m 15h 18m 14h 3m 12h 28m 10h 51m 9h 24m 8h 40m

Solar UV radiation in Mercer, Wisconsin, United States §

Mercer experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 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 Mercer UV Index data.

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