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Monthly climate in Colfax, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Colfax features a humid continental climate (Dfa).Temperatures typically range between -6 °C (22 °F) and 25 °C (77 °F) through the year, but rarely can drop to -31 °C (-23 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1013 mm (39.9 inches) and receives 101 rainy days on the 1 mm (0.04 inches) threshold annually.Colfax enjoys an average of 3052 hours of sunshine throughout the year, and daylight varies from 9 hours 10 minutes to 15 hours 9 minutes per day.

Monthly average temperatures in Colfax, Iowa, United States §

The warmest months in Colfax are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (74 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -1 °C (22 - 31 °F) throughout the day. On average each year, Colfax experiences 95 days above 25 °C (77.0 °F) and 121 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Colfax, 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)		 22°C
(71°F)		 23°C
(73°F)		 30°C
(86°F)		 35°C
(96°F)		 38°C
(100°F)		 35°C
(95°F)		 36°C
(97°F)		 33°C
(92°F)		 31°C
(89°F)		 24°C
(76°F)		 22°C
(73°F)
Mean maximum 10°C
(51°F)		 14°C
(58°F)		 21°C
(69°F)		 27°C
(80°F)		 32°C
(90°F)		 34°C
(93°F)		 34°C
(94°F)		 33°C
(92°F)		 32°C
(90°F)		 30°C
(86°F)		 19°C
(66°F)		 17°C
(62°F)
Average high -1°C
(30°F)		 -0°C
(32°F)		 9°C
(48°F)		 15°C
(60°F)		 22°C
(72°F)		 28°C
(83°F)		 30°C
(85°F)		 28°C
(83°F)		 26°C
(78°F)		 16°C
(62°F)		 9°C
(48°F)		 4°C
(39°F)
Daily mean -6°C
(22°F)		 -5°C
(23°F)		 4°C
(39°F)		 9°C
(49°F)		 17°C
(62°F)		 23°C
(74°F)		 25°C
(77°F)		 23°C
(74°F)		 20°C
(68°F)		 11°C
(53°F)		 3°C
(38°F)		 -1°C
(31°F)
Average low -10°C
(14°F)		 -10°C
(14°F)		 -1°C
(31°F)		 4°C
(39°F)		 12°C
(54°F)		 18°C
(65°F)		 20°C
(68°F)		 18°C
(64°F)		 15°C
(58°F)		 6°C
(44°F)		 -2°C
(29°F)		 -5°C
(22°F)
Mean minimum -25°C
(-12°F)		 -24°C
(-11°F)		 -13°C
(9°F)		 -6°C
(21°F)		 4°C
(39°F)		 12°C
(54°F)		 15°C
(59°F)		 12°C
(54°F)		 7°C
(44°F)		 -3°C
(27°F)		 -12°C
(11°F)		 -15°C
(5°F)
Minimum -31°C
(-23°F)		 -31°C
(-23°F)		 -21°C
(-6°F)		 -10°C
(14°F)		 1°C
(33°F)		 9°C
(49°F)		 13°C
(56°F)		 11°C
(51°F)		 4°C
(39°F)		 -6°C
(22°F)		 -21°C
(-5°F)		 -22°C
(-8°F)

Compare climate in Colfax with other places

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

Monthly average precipitation in Colfax, Iowa, United States §

Colfax usually has the most precipitation in May, June and October, with an average of 11 rainy days and 141 mm (5.6 inches) of precipitation per month.The driest months in Colfax are January, November and December. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Colfax, 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) 40 (1.6) 44 (1.7) 81 (3.2) 76 (3.0) 165 (6.5) 119 (4.7) 74 (2.9) 78 (3.1) 118 (4.7) 140 (5.5) 43 (1.7) 35 (1.4)
Average precipitation days (≥ 1 mm) 6 8 8 9 14 10 8 7 9 11 6 5

Monthly sunshine hours in Colfax, Iowa, United States §

The sunniest months in Colfax are June, July and August, when the sun shines an average of 11 hours 27 minutes a day.Least sunny months in Colfax: January, February and December receive an average of 5 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Colfax, 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 138 191 222 257 264 344 373 337 279 226 210 208
Mean daily daylight hours 9h 31m 10h 36m 11h 58m 13h 22m 14h 33m 15h 9m 14h 49m 13h 46m 12h 25m 11h 1m 9h 48m 9h 10m

Solar UV radiation in Colfax, Iowa, United States §

Colfax 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 Colfax UV Index data.

Average daily maximum UV levels by month for Colfax, 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 3