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Monthly climate in Fort Madison, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Fort Madison features a humid continental climate (Dfa).Temperatures typically range between -3 °C (26 °F) and 26 °C (78 °F) through the year, but rarely can drop to -30 °C (-21 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1076 mm (42.4 inches) and receives 114 rainy days on the 1 mm (0.04 inches) threshold annually.Fort Madison enjoys an average of 2955 hours of sunshine throughout the year, and daylight varies from 9 hours 18 minutes to 15 hours 1 minutes per day.

Monthly average temperatures in Fort Madison, Iowa, United States §

The warmest months in Fort Madison are June, July and August, with daily mean temperatures ranging from 24 to 26 °C (75 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 1 °C (26 - 34 °F) throughout the day. On average each year, Fort Madison experiences 107 days above 25 °C (77.0 °F) and 101 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fort Madison, 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)		 30°C
(85°F)		 36°C
(97°F)		 36°C
(98°F)		 38°C
(100°F)		 36°C
(97°F)		 35°C
(95°F)		 32°C
(91°F)		 24°C
(76°F)		 22°C
(72°F)
Mean maximum 12°C
(54°F)		 16°C
(61°F)		 20°C
(69°F)		 27°C
(82°F)		 32°C
(90°F)		 34°C
(93°F)		 35°C
(96°F)		 34°C
(94°F)		 33°C
(92°F)		 30°C
(87°F)		 19°C
(66°F)		 17°C
(64°F)
Average high 1°C
(33°F)		 3°C
(37°F)		 10°C
(51°F)		 16°C
(61°F)		 23°C
(73°F)		 29°C
(85°F)		 31°C
(87°F)		 29°C
(85°F)		 27°C
(80°F)		 18°C
(65°F)		 9°C
(49°F)		 6°C
(43°F)
Daily mean -3°C
(26°F)		 -2°C
(29°F)		 5°C
(42°F)		 10°C
(51°F)		 18°C
(64°F)		 24°C
(75°F)		 26°C
(78°F)		 24°C
(75°F)		 21°C
(70°F)		 13°C
(56°F)		 5°C
(41°F)		 1°C
(34°F)
Average low -7°C
(19°F)		 -7°C
(20°F)		 1°C
(34°F)		 5°C
(42°F)		 13°C
(56°F)		 19°C
(66°F)		 21°C
(70°F)		 19°C
(66°F)		 16°C
(60°F)		 8°C
(47°F)		 -0°C
(32°F)		 -3°C
(26°F)
Mean minimum -21°C
(-6°F)		 -20°C
(-4°F)		 -10°C
(14°F)		 -3°C
(26°F)		 5°C
(42°F)		 14°C
(57°F)		 16°C
(61°F)		 13°C
(56°F)		 8°C
(47°F)		 -1°C
(30°F)		 -10°C
(14°F)		 -14°C
(8°F)
Minimum -29°C
(-20°F)		 -30°C
(-21°F)		 -18°C
(-0°F)		 -9°C
(16°F)		 3°C
(37°F)		 10°C
(51°F)		 15°C
(60°F)		 12°C
(54°F)		 7°C
(45°F)		 -4°C
(26°F)		 -15°C
(6°F)		 -21°C
(-6°F)

Compare climate in Fort Madison with other places

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

Monthly average precipitation in Fort Madison, Iowa, United States §

Fort Madison 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 Fort Madison are January, November and December. On average, 51 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fort Madison, 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) 56 (2.2) 60 (2.3) 97 (3.8) 92 (3.6) 168 (6.6) 131 (5.1) 79 (3.1) 75 (3.0) 100 (4.0) 123 (4.8) 51 (2.0) 45 (1.8)
Average precipitation days (≥ 1 mm) 7 10 12 11 15 10 9 8 8 12 7 5

Monthly sunshine hours in Fort Madison, Iowa, United States §

The sunniest months in Fort Madison are June, July and August, when the sun shines an average of 11 hours 2 minutes a day.Least sunny months in Fort Madison: January, February and December receive an average of 5 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Fort Madison, 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 125 182 218 240 270 331 351 331 278 220 202 201
Mean daily daylight hours 9h 37m 10h 39m 11h 58m 13h 19m 14h 27m 15h 1m 14h 42m 13h 41m 12h 24m 11h 4m 9h 53m 9h 18m

Solar UV radiation in Fort Madison, Iowa, United States §

Fort Madison 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 Low / 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 Fort Madison UV Index data.

Average daily maximum UV levels by month for Fort Madison, 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 10 9 8 6 4 2