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Monthly climate in Rockwell City, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Rockwell City features a humid continental climate (Dfa).Temperatures typically range between -6 °C (21 °F) and 24 °C (76 °F) through the year, but rarely can drop to -32 °C (-25 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 969 mm (38.1 inches) and receives 102 rainy days on the 1 mm (0.04 inches) threshold annually.Rockwell City enjoys an average of 3052 hours of sunshine throughout the year, and daylight varies from 9 hours 5 minutes to 15 hours 14 minutes per day.

Monthly average temperatures in Rockwell City, Iowa, United States §

The warmest months in Rockwell City are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (72 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -2 °C (21 - 29 °F) throughout the day. On average each year, Rockwell City experiences 90 days above 25 °C (77.0 °F) and 131 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rockwell City, 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 12°C
(54°F)		 21°C
(69°F)		 25°C
(76°F)		 29°C
(84°F)		 36°C
(97°F)		 37°C
(99°F)		 34°C
(94°F)		 37°C
(98°F)		 35°C
(95°F)		 31°C
(88°F)		 26°C
(79°F)		 21°C
(70°F)
Mean maximum 10°C
(51°F)		 13°C
(56°F)		 21°C
(70°F)		 26°C
(78°F)		 32°C
(90°F)		 33°C
(92°F)		 34°C
(93°F)		 32°C
(90°F)		 33°C
(91°F)		 29°C
(84°F)		 19°C
(66°F)		 15°C
(59°F)
Average high -1°C
(30°F)		 -1°C
(31°F)		 8°C
(47°F)		 14°C
(58°F)		 21°C
(71°F)		 29°C
(84°F)		 29°C
(85°F)		 27°C
(82°F)		 25°C
(77°F)		 15°C
(60°F)		 8°C
(46°F)		 3°C
(37°F)
Daily mean -6°C
(21°F)		 -6°C
(21°F)		 3°C
(38°F)		 8°C
(47°F)		 16°C
(61°F)		 23°C
(74°F)		 24°C
(76°F)		 22°C
(72°F)		 19°C
(67°F)		 10°C
(51°F)		 3°C
(37°F)		 -2°C
(29°F)
Average low -10°C
(14°F)		 -11°C
(12°F)		 -2°C
(29°F)		 3°C
(37°F)		 11°C
(52°F)		 18°C
(64°F)		 19°C
(67°F)		 17°C
(63°F)		 14°C
(57°F)		 5°C
(42°F)		 -2°C
(28°F)		 -6°C
(21°F)
Mean minimum -24°C
(-10°F)		 -23°C
(-9°F)		 -12°C
(11°F)		 -7°C
(20°F)		 3°C
(38°F)		 11°C
(53°F)		 13°C
(56°F)		 11°C
(53°F)		 6°C
(43°F)		 -4°C
(26°F)		 -12°C
(11°F)		 -17°C
(2°F)
Minimum -29°C
(-20°F)		 -32°C
(-25°F)		 -23°C
(-8°F)		 -12°C
(11°F)		 1°C
(35°F)		 8°C
(47°F)		 12°C
(54°F)		 10°C
(50°F)		 4°C
(39°F)		 -8°C
(17°F)		 -17°C
(2°F)		 -23°C
(-9°F)

Compare climate in Rockwell City with other places

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

Monthly average precipitation in Rockwell City, Iowa, United States §

Rockwell City usually has the most precipitation in May, June and August, with an average of 11 rainy days and 128 mm (5.0 inches) of precipitation per month.The driest months in Rockwell City are January, November and December. On average, 34 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rockwell City, 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) 28 (1.1) 43 (1.7) 76 (3.0) 72 (2.8) 152 (6.0) 118 (4.6) 76 (3.0) 113 (4.5) 105 (4.1) 111 (4.4) 36 (1.4) 38 (1.5)
Average precipitation days (≥ 1 mm) 5 8 8 10 14 11 7 10 9 10 6 4

Monthly sunshine hours in Rockwell City, Iowa, United States §

The sunniest months in Rockwell City are June, July and August, when the sun shines an average of 11 hours 24 minutes a day.Least sunny months in Rockwell City: January, February and December receive an average of 6 hours 5 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rockwell City, 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 143 199 222 254 261 344 374 330 272 226 212 210
Mean daily daylight hours 9h 26m 10h 33m 11h 58m 13h 24m 14h 37m 15h 14m 14h 54m 13h 49m 12h 25m 10h 59m 9h 44m 9h 5m

Solar UV radiation in Rockwell City, Iowa, United States §

Rockwell City 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 Rockwell City UV Index data.

Average daily maximum UV levels by month for Rockwell City, 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 6 3 3