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Monthly climate in Merton, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Merton features a humid continental climate (Dfb).Temperatures typically range between -5 °C (23 °F) and 23 °C (74 °F) through the year, but rarely can drop to -32 °C (-26 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 992 mm (39.1 inches) and receives 118 rainy days on the 1 mm (0.04 inches) threshold annually.Merton enjoys an average of 2911 hours of sunshine throughout the year, and daylight varies from 9 hours 1 minutes to 15 hours 18 minutes per day.

Monthly average temperatures in Merton, Wisconsin, United States §

The warmest months in Merton are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (69 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -1 °C (23 - 30 °F) throughout the day. On average each year, Merton experiences 68 days above 25 °C (77.0 °F) and 122 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Merton, 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 13°C
(56°F)		 20°C
(68°F)		 20°C
(69°F)		 27°C
(81°F)		 34°C
(93°F)		 34°C
(94°F)		 35°C
(95°F)		 33°C
(92°F)		 34°C
(93°F)		 30°C
(86°F)		 24°C
(75°F)		 19°C
(66°F)
Mean maximum 8°C
(47°F)		 12°C
(55°F)		 17°C
(63°F)		 24°C
(76°F)		 31°C
(88°F)		 32°C
(91°F)		 34°C
(93°F)		 32°C
(89°F)		 30°C
(87°F)		 28°C
(82°F)		 17°C
(63°F)		 14°C
(57°F)
Average high -2°C
(29°F)		 -0°C
(32°F)		 6°C
(44°F)		 12°C
(54°F)		 19°C
(67°F)		 25°C
(78°F)		 28°C
(82°F)		 26°C
(80°F)		 23°C
(74°F)		 15°C
(59°F)		 6°C
(43°F)		 2°C
(36°F)
Daily mean -5°C
(23°F)		 -5°C
(24°F)		 2°C
(36°F)		 7°C
(45°F)		 14°C
(58°F)		 20°C
(69°F)		 23°C
(74°F)		 22°C
(71°F)		 18°C
(65°F)		 11°C
(52°F)		 3°C
(37°F)		 -1°C
(30°F)
Average low -9°C
(16°F)		 -9°C
(16°F)		 -2°C
(28°F)		 3°C
(37°F)		 10°C
(49°F)		 15°C
(60°F)		 19°C
(66°F)		 17°C
(63°F)		 14°C
(57°F)		 7°C
(45°F)		 -1°C
(30°F)		 -4°C
(24°F)
Mean minimum -23°C
(-9°F)		 -23°C
(-9°F)		 -15°C
(6°F)		 -5°C
(24°F)		 1°C
(34°F)		 11°C
(51°F)		 14°C
(57°F)		 11°C
(53°F)		 7°C
(44°F)		 -2°C
(29°F)		 -10°C
(14°F)		 -15°C
(5°F)
Minimum -32°C
(-25°F)		 -32°C
(-26°F)		 -24°C
(-10°F)		 -9°C
(17°F)		 -1°C
(30°F)		 7°C
(44°F)		 12°C
(55°F)		 9°C
(48°F)		 3°C
(37°F)		 -4°C
(26°F)		 -15°C
(5°F)		 -23°C
(-8°F)

Compare climate in Merton with other places

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

Monthly average precipitation in Merton, Wisconsin, United States §

Merton usually has the most precipitation in April, May and October, with an average of 12 rainy days and 115 mm (4.5 inches) of precipitation per month.The driest months in Merton are February, November and December. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Merton, 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) 54 (2.1) 51 (2.0) 61 (2.4) 107 (4.2) 126 (5.0) 106 (4.2) 97 (3.8) 87 (3.4) 98 (3.9) 112 (4.4) 46 (1.8) 46 (1.8)
Average precipitation days (≥ 1 mm) 7 9 9 12 13 12 10 10 10 12 8 6

Monthly sunshine hours in Merton, Wisconsin, United States §

The sunniest months in Merton are June, July and August, when the sun shines an average of 11 hours 3 minutes a day.Least sunny months in Merton: January, November and December receive an average of 5 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Merton, 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 122 188 235 244 278 322 359 334 272 202 183 166
Mean daily daylight hours 9h 23m 10h 31m 11h 57m 13h 26m 14h 41m 15h 18m 14h 58m 13h 51m 12h 26m 10h 58m 9h 41m 9h 1m

Solar UV radiation in Merton, Wisconsin, United States §

Merton 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 Merton UV Index data.

Average daily maximum UV levels by month for Merton, 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 7 5 3 2