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Monthly climate in Lake Mills, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Lake Mills features a humid continental climate (Dfa).Temperatures typically range between -8 °C (17 °F) and 23 °C (74 °F) through the year, but rarely can drop to -35 °C (-30 °F) or can rise to as high as 36 °C (96 °F).The average annual precipitation amounts to about 1038 mm (40.9 inches) and receives 109 rainy days on the 1 mm (0.04 inches) threshold annually.Lake Mills enjoys an average of 2994 hours of sunshine throughout the year, and daylight varies from 8 hours 59 minutes to 15 hours 20 minutes per day.

Monthly average temperatures in Lake Mills, Iowa, United States §

The warmest months in Lake Mills 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 -8 to -3 °C (17 - 26 °F) throughout the day. On average each year, Lake Mills experiences 75 days above 25 °C (77.0 °F) and 138 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Lake Mills, Iowa, 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 10°C
(50°F)		 18°C
(65°F)		 23°C
(73°F)		 28°C
(83°F)		 35°C
(95°F)		 36°C
(96°F)		 34°C
(93°F)		 35°C
(96°F)		 33°C
(92°F)		 30°C
(86°F)		 25°C
(77°F)		 19°C
(67°F)
Mean maximum 7°C
(46°F)		 9°C
(48°F)		 18°C
(65°F)		 25°C
(77°F)		 31°C
(88°F)		 32°C
(91°F)		 33°C
(92°F)		 31°C
(89°F)		 31°C
(88°F)		 28°C
(83°F)		 18°C
(64°F)		 13°C
(56°F)
Average high -4°C
(25°F)		 -4°C
(25°F)		 6°C
(42°F)		 12°C
(54°F)		 20°C
(69°F)		 27°C
(81°F)		 28°C
(82°F)		 26°C
(79°F)		 24°C
(75°F)		 14°C
(58°F)		 6°C
(43°F)		 1°C
(34°F)
Daily mean -8°C
(18°F)		 -8°C
(17°F)		 1°C
(34°F)		 7°C
(45°F)		 15°C
(60°F)		 22°C
(72°F)		 23°C
(74°F)		 21°C
(70°F)		 18°C
(65°F)		 9°C
(49°F)		 1°C
(35°F)		 -3°C
(26°F)
Average low -12°C
(11°F)		 -13°C
(9°F)		 -3°C
(26°F)		 2°C
(35°F)		 10°C
(51°F)		 17°C
(62°F)		 18°C
(65°F)		 16°C
(61°F)		 13°C
(56°F)		 5°C
(41°F)		 -3°C
(26°F)		 -8°C
(19°F)
Mean minimum -26°C
(-14°F)		 -26°C
(-15°F)		 -16°C
(3°F)		 -8°C
(18°F)		 2°C
(36°F)		 10°C
(51°F)		 13°C
(56°F)		 10°C
(51°F)		 6°C
(42°F)		 -4°C
(24°F)		 -13°C
(9°F)		 -20°C
(-5°F)
Minimum -34°C
(-29°F)		 -35°C
(-30°F)		 -26°C
(-14°F)		 -15°C
(6°F)		 -0°C
(32°F)		 8°C
(47°F)		 12°C
(53°F)		 9°C
(49°F)		 3°C
(37°F)		 -9°C
(16°F)		 -18°C
(1°F)		 -24°C
(-10°F)

Compare climate in Lake Mills with other places

Compare temperature, precipitation, sunshine, UV index in Lake Mills, Iowa, United States with other places around the world.

Monthly average precipitation in Lake Mills, Iowa, United States §

Lake Mills usually has the most precipitation in May, June and August, with an average of 12 rainy days and 135 mm (5.3 inches) of precipitation per month.The driest months in Lake Mills are January, November and December. On average, 39 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lake Mills, Iowa, 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) 47 (1.8) 72 (2.8) 85 (3.3) 152 (6.0) 139 (5.5) 100 (4.0) 114 (4.5) 108 (4.2) 104 (4.1) 45 (1.8) 38 (1.5)
Average precipitation days (≥ 1 mm) 5 7 8 10 15 12 10 10 10 11 6 5

Monthly sunshine hours in Lake Mills, Iowa, United States §

The sunniest months in Lake Mills are June, July and August, when the sun shines an average of 11 hours 17 minutes a day.Least sunny months in Lake Mills: January, November and December receive an average of 5 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lake Mills, Iowa, 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 140 199 231 242 276 341 367 329 259 219 195 192
Mean daily daylight hours 9h 21m 10h 30m 11h 58m 13h 27m 14h 42m 15h 20m 14h 59m 13h 52m 12h 26m 10h 57m 9h 39m 8h 59m

Solar UV radiation in Lake Mills, Iowa, United States §

Lake Mills 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 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 Lake Mills UV Index data.

Average daily maximum UV levels by month for Lake Mills, Iowa, 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 5 5 8 9 10 10 9 8 5 3 3