nomadseason

Monthly climate in Clinton, Illinois, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Clinton features a humid continental climate (Dfa).Temperatures typically range between -2 °C (28 °F) and 25 °C (77 °F) through the year, but rarely can drop to -28 °C (-19 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1152 mm (45.4 inches) and receives 125 rainy days on the 1 mm (0.04 inches) threshold annually.Clinton enjoys an average of 2986 hours of sunshine throughout the year, and daylight varies from 9 hours 20 minutes to 14 hours 59 minutes per day.

Monthly average temperatures in Clinton, Illinois, United States §

The warmest months in Clinton 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 -2 to 2 °C (28 - 35 °F) throughout the day. On average each year, Clinton experiences 107 days above 25 °C (77.0 °F) and 99 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Clinton, Illinois, 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 17°C
(62°F)		 23°C
(73°F)		 25°C
(78°F)		 29°C
(84°F)		 34°C
(94°F)		 35°C
(95°F)		 34°C
(94°F)		 34°C
(94°F)		 35°C
(95°F)		 32°C
(90°F)		 24°C
(76°F)		 19°C
(66°F)
Mean maximum 14°C
(57°F)		 17°C
(62°F)		 21°C
(70°F)		 27°C
(81°F)		 31°C
(89°F)		 33°C
(91°F)		 33°C
(92°F)		 33°C
(91°F)		 33°C
(91°F)		 30°C
(86°F)		 20°C
(68°F)		 17°C
(63°F)
Average high 2°C
(35°F)		 4°C
(39°F)		 11°C
(52°F)		 16°C
(61°F)		 23°C
(74°F)		 28°C
(83°F)		 29°C
(85°F)		 28°C
(83°F)		 27°C
(81°F)		 19°C
(66°F)		 10°C
(50°F)		 6°C
(44°F)
Daily mean -2°C
(28°F)		 -1°C
(31°F)		 6°C
(43°F)		 11°C
(52°F)		 18°C
(65°F)		 23°C
(74°F)		 25°C
(77°F)		 23°C
(74°F)		 21°C
(70°F)		 14°C
(57°F)		 5°C
(41°F)		 2°C
(35°F)
Average low -6°C
(21°F)		 -6°C
(22°F)		 1°C
(34°F)		 6°C
(42°F)		 13°C
(56°F)		 18°C
(65°F)		 20°C
(69°F)		 18°C
(65°F)		 16°C
(60°F)		 9°C
(48°F)		 0°C
(33°F)		 -3°C
(27°F)
Mean minimum -20°C
(-5°F)		 -19°C
(-3°F)		 -11°C
(13°F)		 -3°C
(27°F)		 4°C
(39°F)		 13°C
(56°F)		 15°C
(59°F)		 12°C
(55°F)		 8°C
(47°F)		 -1°C
(31°F)		 -9°C
(17°F)		 -13°C
(9°F)
Minimum -28°C
(-19°F)		 -24°C
(-12°F)		 -18°C
(-0°F)		 -8°C
(18°F)		 -0°C
(32°F)		 10°C
(51°F)		 13°C
(56°F)		 12°C
(54°F)		 5°C
(42°F)		 -5°C
(24°F)		 -13°C
(8°F)		 -21°C
(-5°F)

Compare climate in Clinton with other places

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

Monthly average precipitation in Clinton, Illinois, United States §

Clinton usually has the most precipitation in March, April and May, with an average of 13 rainy days and 132 mm (5.2 inches) of precipitation per month.The driest months in Clinton are September, November and December. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Clinton, Illinois, 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) 69 (2.7) 71 (2.8) 122 (4.8) 121 (4.8) 152 (6.0) 116 (4.6) 99 (3.9) 99 (3.9) 63 (2.5) 119 (4.7) 66 (2.6) 54 (2.1)
Average precipitation days (≥ 1 mm) 8 10 11 12 16 12 11 11 7 11 8 8

Monthly sunshine hours in Clinton, Illinois, United States §

The sunniest months in Clinton are June, July and August, when the sun shines an average of 11 hours 9 minutes a day.Least sunny months in Clinton: January, February and December receive an average of 5 hours 23 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Clinton, Illinois, 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 119 174 218 242 287 337 352 336 291 230 198 197
Mean daily daylight hours 9h 39m 10h 40m 11h 58m 13h 18m 14h 25m 14h 59m 14h 40m 13h 40m 12h 24m 11h 4m 9h 55m 9h 20m

Solar UV radiation in Clinton, Illinois, United States §

Clinton experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 10 - 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 Clinton UV Index data.

Average daily maximum UV levels by month for Clinton, Illinois, 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 7 9 10 11 10 9 8 6 4 2