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Monthly climate in Green Valley, Illinois, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Green Valley features a humid continental climate (Dfa).Temperatures typically range between -3 °C (28 °F) and 25 °C (77 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1188 mm (46.8 inches) and receives 122 rainy days on the 1 mm (0.04 inches) threshold annually.Green Valley enjoys an average of 2980 hours of sunshine throughout the year, and daylight varies from 9 hours 19 minutes to 14 hours 59 minutes per day.

Monthly average temperatures in Green Valley, Illinois, United States §

The warmest months in Green Valley are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (75 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 2 °C (28 - 35 °F) throughout the day. On average each year, Green Valley 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 Green Valley, 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 15°C
(59°F)		 23°C
(73°F)		 25°C
(78°F)		 29°C
(84°F)		 35°C
(95°F)		 34°C
(93°F)		 35°C
(95°F)		 35°C
(96°F)		 35°C
(95°F)		 32°C
(90°F)		 24°C
(76°F)		 20°C
(69°F)
Mean maximum 13°C
(55°F)		 16°C
(61°F)		 21°C
(71°F)		 27°C
(82°F)		 32°C
(90°F)		 33°C
(91°F)		 34°C
(93°F)		 33°C
(92°F)		 33°C
(91°F)		 30°C
(87°F)		 19°C
(66°F)		 17°C
(63°F)
Average high 1°C
(35°F)		 3°C
(38°F)		 11°C
(52°F)		 16°C
(61°F)		 23°C
(74°F)		 29°C
(84°F)		 30°C
(86°F)		 29°C
(84°F)		 27°C
(81°F)		 19°C
(66°F)		 10°C
(49°F)		 6°C
(43°F)
Daily mean -3°C
(28°F)		 -1°C
(30°F)		 6°C
(43°F)		 11°C
(52°F)		 18°C
(65°F)		 23°C
(75°F)		 25°C
(77°F)		 24°C
(75°F)		 21°C
(70°F)		 13°C
(57°F)		 5°C
(41°F)		 2°C
(35°F)
Average low -7°C
(20°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 -21°C
(-5°F)		 -20°C
(-4°F)		 -10°C
(14°F)		 -3°C
(27°F)		 4°C
(40°F)		 13°C
(56°F)		 15°C
(60°F)		 13°C
(56°F)		 8°C
(47°F)		 -1°C
(31°F)		 -9°C
(16°F)		 -13°C
(10°F)
Minimum -29°C
(-20°F)		 -28°C
(-18°F)		 -18°C
(0°F)		 -8°C
(18°F)		 -0°C
(32°F)		 10°C
(51°F)		 13°C
(56°F)		 13°C
(55°F)		 6°C
(42°F)		 -3°C
(26°F)		 -14°C
(7°F)		 -20°C
(-5°F)

Compare climate in Green Valley with other places

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

Monthly average precipitation in Green Valley, Illinois, United States §

Green Valley usually has the most precipitation in May, June and October, with an average of 12 rainy days and 146 mm (5.7 inches) of precipitation per month.The driest months in Green Valley are January, November and December. On average, 59 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Green Valley, 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) 64 (2.5) 69 (2.7) 118 (4.6) 117 (4.6) 165 (6.5) 150 (5.9) 112 (4.4) 89 (3.5) 68 (2.7) 122 (4.8) 60 (2.4) 54 (2.1)
Average precipitation days (≥ 1 mm) 8 10 11 11 15 12 11 10 7 11 9 7

Monthly sunshine hours in Green Valley, Illinois, United States §

The sunniest months in Green Valley are June, July and August, when the sun shines an average of 11 hours 8 minutes a day.Least sunny months in Green Valley: January, February and December receive an average of 5 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Green Valley, 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 120 176 216 240 285 336 351 336 289 230 198 197
Mean daily daylight hours 9h 38m 10h 40m 11h 58m 13h 18m 14h 26m 14h 59m 14h 41m 13h 41m 12h 24m 11h 4m 9h 54m 9h 19m

Solar UV radiation in Green Valley, Illinois, United States §

Green Valley 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 Green Valley UV Index data.

Average daily maximum UV levels by month for Green Valley, 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 8 10 11 10 9 8 6 4 2