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Monthly climate in Des Moines, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Des Moines features a humid continental climate (Dfa).Temperatures typically range between -5 °C (23 °F) and 25 °C (78 °F) through the year, but rarely can drop to -31 °C (-24 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 999 mm (39.3 inches) and receives 104 rainy days on the 1 mm (0.04 inches) threshold annually.Des Moines enjoys an average of 3054 hours of sunshine throughout the year, and daylight varies from 9 hours 12 minutes to 15 hours 7 minutes per day.

Monthly average temperatures in Des Moines, United States §

The warmest months in Des Moines are June, July and August, with daily mean temperatures ranging from 24 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 (23 - 31 °F) throughout the day. On average each year, Des Moines experiences 99 days above 25 °C (77.0 °F) and 117 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Des Moines, 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 15°C
(59°F)		 22°C
(72°F)		 23°C
(74°F)		 30°C
(86°F)		 36°C
(97°F)		 38°C
(101°F)		 37°C
(98°F)		 36°C
(97°F)		 33°C
(92°F)		 31°C
(89°F)		 25°C
(76°F)		 23°C
(73°F)
Mean maximum 12°C
(53°F)		 16°C
(61°F)		 21°C
(70°F)		 27°C
(81°F)		 32°C
(90°F)		 34°C
(93°F)		 35°C
(95°F)		 34°C
(93°F)		 33°C
(91°F)		 30°C
(86°F)		 19°C
(67°F)		 17°C
(63°F)
Average high -1°C
(31°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
(62°F)		 9°C
(49°F)		 4°C
(40°F)
Daily mean -5°C
(23°F)		 -4°C
(24°F)		 4°C
(40°F)		 10°C
(50°F)		 17°C
(63°F)		 24°C
(75°F)		 25°C
(78°F)		 24°C
(75°F)		 20°C
(69°F)		 12°C
(53°F)		 4°C
(39°F)		 -0°C
(31°F)
Average low -10°C
(15°F)		 -9°C
(16°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
(30°F)		 -5°C
(23°F)
Mean minimum -25°C
(-13°F)		 -23°C
(-8°F)		 -11°C
(12°F)		 -6°C
(22°F)		 4°C
(40°F)		 13°C
(55°F)		 15°C
(59°F)		 13°C
(55°F)		 7°C
(46°F)		 -3°C
(27°F)		 -11°C
(12°F)		 -15°C
(5°F)
Minimum -31°C
(-24°F)		 -28°C
(-18°F)		 -21°C
(-5°F)		 -10°C
(14°F)		 2°C
(35°F)		 10°C
(50°F)		 13°C
(56°F)		 11°C
(53°F)		 5°C
(42°F)		 -5°C
(23°F)		 -20°C
(-3°F)		 -22°C
(-8°F)

Compare climate in Des Moines with other places

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

Monthly average precipitation in Des Moines, United States §

Des Moines usually has the most precipitation in May, June and October, with an average of 12 rainy days and 140 mm (5.5 inches) of precipitation per month.The driest months in Des Moines are January, February and December. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Des Moines, 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) 40 (1.6) 41 (1.6) 83 (3.3) 73 (2.9) 166 (6.5) 125 (4.9) 69 (2.7) 76 (3.0) 118 (4.6) 131 (5.2) 42 (1.6) 37 (1.4)
Average precipitation days (≥ 1 mm) 6 7 9 10 16 9 8 8 9 11 6 5

Monthly sunshine hours in Des Moines, United States §

The sunniest months in Des Moines are June, July and August, when the sun shines an average of 11 hours 27 minutes a day.Least sunny months in Des Moines: January, February and December receive an average of 5 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Des Moines, 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 139 193 221 258 264 344 373 335 278 225 210 210
Mean daily daylight hours 9h 32m 10h 36m 11h 58m 13h 21m 14h 32m 15h 7m 14h 48m 13h 45m 12h 25m 11h 1m 9h 49m 9h 12m

Solar UV radiation in Des Moines, United States §

Des Moines 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 Des Moines UV Index data.

Average daily maximum UV levels by month for Des Moines, 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 10 9 8 6 4 3