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Monthly climate in Rockford, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Rockford features a humid continental climate (Dfa).Temperatures typically range between -7 °C (19 °F) and 24 °C (75 °F) through the year, but rarely can drop to -35 °C (-30 °F) or can rise to as high as 37 °C (98 °F).The average annual precipitation amounts to about 1051 mm (41.4 inches) and receives 108 rainy days on the 1 mm (0.04 inches) threshold annually.Rockford enjoys an average of 2960 hours of sunshine throughout the year, and daylight varies from 9 hours 2 minutes to 15 hours 17 minutes per day.

Monthly average temperatures in Rockford, Iowa, United States §

The warmest months in Rockford are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (71 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -2 °C (19 - 28 °F) throughout the day. On average each year, Rockford experiences 82 days above 25 °C (77.0 °F) and 135 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rockford, 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
(53°F)		 19°C
(67°F)		 22°C
(72°F)		 28°C
(82°F)		 34°C
(94°F)		 36°C
(97°F)		 34°C
(93°F)		 37°C
(98°F)		 33°C
(92°F)		 31°C
(88°F)		 25°C
(77°F)		 21°C
(70°F)
Mean maximum 9°C
(48°F)		 11°C
(51°F)		 19°C
(66°F)		 25°C
(77°F)		 32°C
(89°F)		 33°C
(92°F)		 33°C
(92°F)		 32°C
(89°F)		 32°C
(90°F)		 29°C
(84°F)		 18°C
(64°F)		 15°C
(59°F)
Average high -3°C
(27°F)		 -3°C
(27°F)		 7°C
(44°F)		 13°C
(56°F)		 21°C
(70°F)		 27°C
(82°F)		 28°C
(83°F)		 27°C
(80°F)		 24°C
(76°F)		 15°C
(59°F)		 7°C
(44°F)		 2°C
(36°F)
Daily mean -7°C
(20°F)		 -7°C
(19°F)		 2°C
(36°F)		 8°C
(46°F)		 16°C
(61°F)		 22°C
(73°F)		 24°C
(75°F)		 22°C
(71°F)		 19°C
(66°F)		 10°C
(50°F)		 2°C
(36°F)		 -2°C
(28°F)
Average low -11°C
(13°F)		 -12°C
(11°F)		 -3°C
(28°F)		 2°C
(36°F)		 11°C
(51°F)		 17°C
(63°F)		 18°C
(65°F)		 16°C
(61°F)		 13°C
(56°F)		 5°C
(42°F)		 -3°C
(27°F)		 -6°C
(21°F)
Mean minimum -25°C
(-12°F)		 -26°C
(-15°F)		 -16°C
(4°F)		 -7°C
(19°F)		 2°C
(36°F)		 11°C
(51°F)		 13°C
(55°F)		 11°C
(51°F)		 6°C
(42°F)		 -4°C
(24°F)		 -12°C
(10°F)		 -17°C
(1°F)
Minimum -34°C
(-28°F)		 -35°C
(-30°F)		 -24°C
(-11°F)		 -13°C
(9°F)		 -0°C
(31°F)		 8°C
(47°F)		 11°C
(53°F)		 10°C
(50°F)		 2°C
(36°F)		 -8°C
(19°F)		 -17°C
(2°F)		 -22°C
(-7°F)

Compare climate in Rockford with other places

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

Monthly average precipitation in Rockford, Iowa, United States §

Rockford usually has the most precipitation in May, June and October, with an average of 12 rainy days and 138 mm (5.4 inches) of precipitation per month.The driest months in Rockford are January, February and December. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rockford, 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) 39 (1.5) 48 (1.9) 74 (2.9) 77 (3.0) 162 (6.4) 128 (5.0) 97 (3.8) 115 (4.5) 101 (4.0) 125 (4.9) 49 (1.9) 36 (1.4)
Average precipitation days (≥ 1 mm) 5 8 8 9 14 13 9 10 10 10 7 5

Monthly sunshine hours in Rockford, Iowa, United States §

The sunniest months in Rockford are June, July and August, when the sun shines an average of 11 hours 14 minutes a day.Least sunny months in Rockford: January, February and December receive an average of 5 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rockford, 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 135 194 226 240 263 340 368 326 258 217 198 192
Mean daily daylight hours 9h 24m 10h 32m 11h 58m 13h 26m 14h 40m 15h 17m 14h 57m 13h 50m 12h 26m 10h 58m 9h 41m 9h 2m

Solar UV radiation in Rockford, Iowa, United States §

Rockford 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 Rockford UV Index data.

Average daily maximum UV levels by month for Rockford, 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