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Monthly climate in Clear Lake, Iowa, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Clear Lake features a humid continental climate (Dfa). Temperatures typically range between -8 °C (18 °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 (97 °F). The average annual precipitation amounts to about 1051 mm (41.4 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually. Clear Lake enjoys an average of 2985 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 Clear Lake, Iowa, United States §

The warmest months in Clear Lake are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (71 - 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 (18 - 27 °F) throughout the day. On average each year, Clear Lake experiences 78 days above 25 °C (77.0 °F) and 136 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Clear Lake, 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
(51°F)		 19°C
(66°F)		 23°C
(73°F)		 28°C
(83°F)		 35°C
(94°F)		 36°C
(97°F)		 34°C
(93°F)		 36°C
(97°F)		 33°C
(92°F)		 30°C
(87°F)		 25°C
(77°F)		 20°C
(68°F)
Mean maximum 8°C
(47°F)		 9°C
(49°F)		 19°C
(66°F)		 25°C
(77°F)		 31°C
(89°F)		 33°C
(91°F)		 33°C
(92°F)		 31°C
(89°F)		 32°C
(89°F)		 28°C
(83°F)		 18°C
(64°F)		 14°C
(57°F)
Average high -3°C
(26°F)		 -4°C
(26°F)		 6°C
(43°F)		 13°C
(55°F)		 21°C
(70°F)		 27°C
(81°F)		 28°C
(83°F)		 26°C
(80°F)		 24°C
(75°F)		 14°C
(58°F)		 6°C
(44°F)		 1°C
(35°F)
Daily mean -8°C
(19°F)		 -8°C
(18°F)		 1°C
(35°F)		 7°C
(45°F)		 15°C
(60°F)		 22°C
(72°F)		 23°C
(74°F)		 21°C
(71°F)		 18°C
(65°F)		 10°C
(49°F)		 2°C
(35°F)		 -3°C
(27°F)
Average low -11°C
(12°F)		 -13°C
(9°F)		 -3°C
(27°F)		 2°C
(36°F)		 10°C
(51°F)		 17°C
(63°F)		 18°C
(65°F)		 16°C
(61°F)		 13°C
(56°F)		 5°C
(41°F)		 -3°C
(27°F)		 -7°C
(19°F)
Mean minimum -25°C
(-12°F)		 -26°C
(-14°F)		 -16°C
(4°F)		 -8°C
(18°F)		 2°C
(37°F)		 11°C
(51°F)		 13°C
(56°F)		 10°C
(51°F)		 6°C
(42°F)		 -4°C
(25°F)		 -13°C
(9°F)		 -19°C
(-2°F)
Minimum -34°C
(-28°F)		 -35°C
(-30°F)		 -25°C
(-13°F)		 -14°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)		 -17°C
(1°F)		 -23°C
(-10°F)

Compare climate in Clear Lake with other places

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

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

Clear Lake usually has the most precipitation in May, June and August, with an average of 12 rainy days and 138 mm (5.4 inches) of precipitation per month. The driest months in Clear Lake are January, February and December. On average, 40 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Clear Lake, 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) 36 (1.4) 47 (1.9) 72 (2.9) 83 (3.3) 159 (6.2) 133 (5.2) 102 (4.0) 121 (4.8) 105 (4.1) 110 (4.3) 47 (1.9) 36 (1.4)
Average precipitation days (≥ 1 mm) 5 7 9 10 14 13 8 10 10 10 6 5

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

The sunniest months in Clear Lake are June, July and August, when the sun shines an average of 11 hours 17 minutes a day. Least sunny months in Clear Lake: January, February and December receive an average of 5 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Clear Lake, 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 137 195 226 242 268 341 369 328 259 219 199 196
Mean daily daylight hours 9h 23m 10h 31m 11h 58m 13h 26m 14h 41m 15h 18m 14h 57m 13h 51m 12h 26m 10h 58m 9h 41m 9h 1m

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

Clear Lake experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 11, which corresponds to the Very High / Extreme 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 Clear Lake UV Index data.

Average daily maximum UV levels by month for Clear Lake, 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 11 10 9 8 5 3 3

Detailed Monthly Weather Insights for Clear Lake, Iowa, United States

Discover in-depth weather details for every month in Clear Lake. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Clear Lake's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.