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Monthly climate in Oskaloosa, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Oskaloosa features a humid continental climate (Dfa).Temperatures typically range between -5 °C (24 °F) and 25 °C (78 °F) through the year, but rarely can drop to -30 °C (-23 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1023 mm (40.3 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually.Oskaloosa enjoys an average of 3023 hours of sunshine throughout the year, and daylight varies from 9 hours 14 minutes to 15 hours 4 minutes per day.

Monthly average temperatures in Oskaloosa, Iowa, United States §

The warmest months in Oskaloosa are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (75 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to 0 °C (24 - 32 °F) throughout the day. On average each year, Oskaloosa experiences 101 days above 25 °C (77.0 °F) and 113 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Oskaloosa, 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 14°C
(58°F)		 23°C
(73°F)		 23°C
(73°F)		 29°C
(85°F)		 36°C
(97°F)		 38°C
(100°F)		 37°C
(98°F)		 37°C
(99°F)		 34°C
(93°F)		 31°C
(88°F)		 24°C
(76°F)		 23°C
(74°F)
Mean maximum 12°C
(53°F)		 16°C
(61°F)		 21°C
(70°F)		 27°C
(80°F)		 32°C
(90°F)		 34°C
(94°F)		 35°C
(95°F)		 34°C
(93°F)		 32°C
(91°F)		 30°C
(86°F)		 19°C
(67°F)		 18°C
(64°F)
Average high -0°C
(32°F)		 1°C
(34°F)		 10°C
(50°F)		 16°C
(60°F)		 22°C
(72°F)		 29°C
(84°F)		 30°C
(86°F)		 29°C
(84°F)		 26°C
(79°F)		 17°C
(63°F)		 9°C
(49°F)		 5°C
(41°F)
Daily mean -5°C
(24°F)		 -4°C
(25°F)		 5°C
(41°F)		 10°C
(50°F)		 17°C
(63°F)		 24°C
(75°F)		 25°C
(78°F)		 23°C
(75°F)		 20°C
(69°F)		 12°C
(54°F)		 4°C
(40°F)		 -0°C
(32°F)
Average low -9°C
(16°F)		 -9°C
(17°F)		 0°C
(32°F)		 4°C
(40°F)		 12°C
(54°F)		 18°C
(65°F)		 20°C
(69°F)		 18°C
(65°F)		 15°C
(59°F)		 7°C
(45°F)		 -1°C
(31°F)		 -5°C
(24°F)
Mean minimum -24°C
(-12°F)		 -22°C
(-7°F)		 -11°C
(12°F)		 -5°C
(23°F)		 4°C
(40°F)		 13°C
(55°F)		 15°C
(60°F)		 12°C
(55°F)		 8°C
(46°F)		 -2°C
(28°F)		 -11°C
(13°F)		 -15°C
(6°F)
Minimum -30°C
(-23°F)		 -30°C
(-22°F)		 -21°C
(-6°F)		 -10°C
(15°F)		 2°C
(35°F)		 9°C
(49°F)		 14°C
(57°F)		 11°C
(53°F)		 6°C
(43°F)		 -4°C
(26°F)		 -17°C
(2°F)		 -22°C
(-8°F)

Compare climate in Oskaloosa with other places

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

Monthly average precipitation in Oskaloosa, Iowa, United States §

Oskaloosa usually has the most precipitation in May, June and October, with an average of 12 rainy days and 137 mm (5.4 inches) of precipitation per month.The driest months in Oskaloosa are January, February and December. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Oskaloosa, 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) 46 (1.8) 49 (1.9) 87 (3.4) 72 (2.8) 154 (6.1) 130 (5.1) 76 (3.0) 69 (2.7) 122 (4.8) 128 (5.0) 51 (2.0) 39 (1.5)
Average precipitation days (≥ 1 mm) 6 7 10 9 15 10 10 8 9 11 7 5

Monthly sunshine hours in Oskaloosa, Iowa, United States §

The sunniest months in Oskaloosa are June, July and August, when the sun shines an average of 11 hours 20 minutes a day.Least sunny months in Oskaloosa: January, February and December receive an average of 5 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Oskaloosa, 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 134 188 221 252 263 339 368 336 277 227 208 207
Mean daily daylight hours 9h 34m 10h 38m 11h 58m 13h 20m 14h 30m 15h 4m 14h 45m 13h 43m 12h 24m 11h 2m 9h 51m 9h 14m

Solar UV radiation in Oskaloosa, Iowa, United States §

Oskaloosa 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 4. For more detailed information, check out our hourly Oskaloosa UV Index data.

Average daily maximum UV levels by month for Oskaloosa, 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 6 8 9 11 11 9 8 6 4 3