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Monthly climate in Stockton, Illinois, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Stockton features a humid continental climate (Dfa).Temperatures typically range between -5 °C (23 °F) and 24 °C (76 °F) through the year, but rarely can drop to -32 °C (-26 °F) or can rise to as high as 34 °C (94 °F).The average annual precipitation amounts to about 1053 mm (41.5 inches) and receives 117 rainy days on the 1 mm (0.04 inches) threshold annually.Stockton enjoys an average of 2916 hours of sunshine throughout the year, and daylight varies from 9 hours 7 minutes to 15 hours 12 minutes per day.

Monthly average temperatures in Stockton, Illinois, United States §

The warmest months in Stockton are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (72 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -1 °C (23 - 31 °F) throughout the day. On average each year, Stockton experiences 86 days above 25 °C (77.0 °F) and 122 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Stockton, 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 11°C
(52°F)		 20°C
(69°F)		 23°C
(74°F)		 27°C
(81°F)		 34°C
(94°F)		 34°C
(93°F)		 34°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)		 30°C
(86°F)		 22°C
(73°F)		 19°C
(67°F)
Mean maximum 8°C
(47°F)		 13°C
(55°F)		 19°C
(67°F)		 26°C
(78°F)		 31°C
(88°F)		 32°C
(90°F)		 33°C
(92°F)		 32°C
(89°F)		 31°C
(88°F)		 29°C
(84°F)		 17°C
(63°F)		 14°C
(58°F)
Average high -2°C
(29°F)		 0°C
(33°F)		 8°C
(47°F)		 14°C
(57°F)		 21°C
(70°F)		 27°C
(81°F)		 29°C
(84°F)		 27°C
(82°F)		 25°C
(76°F)		 16°C
(61°F)		 7°C
(45°F)		 3°C
(38°F)
Daily mean -5°C
(23°F)		 -4°C
(24°F)		 3°C
(38°F)		 9°C
(48°F)		 16°C
(61°F)		 22°C
(72°F)		 24°C
(76°F)		 22°C
(72°F)		 19°C
(67°F)		 11°C
(52°F)		 3°C
(37°F)		 -1°C
(31°F)
Average low -9°C
(15°F)		 -9°C
(16°F)		 -1°C
(30°F)		 3°C
(38°F)		 11°C
(52°F)		 17°C
(63°F)		 19°C
(67°F)		 17°C
(62°F)		 14°C
(57°F)		 7°C
(44°F)		 -1°C
(30°F)		 -5°C
(24°F)
Mean minimum -24°C
(-12°F)		 -24°C
(-11°F)		 -14°C
(7°F)		 -4°C
(25°F)		 2°C
(36°F)		 12°C
(54°F)		 14°C
(58°F)		 12°C
(54°F)		 6°C
(43°F)		 -3°C
(27°F)		 -10°C
(14°F)		 -14°C
(7°F)
Minimum -32°C
(-25°F)		 -32°C
(-26°F)		 -24°C
(-10°F)		 -8°C
(18°F)		 -2°C
(28°F)		 9°C
(49°F)		 13°C
(55°F)		 11°C
(53°F)		 2°C
(36°F)		 -5°C
(23°F)		 -16°C
(3°F)		 -21°C
(-6°F)

Compare climate in Stockton with other places

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

Monthly average precipitation in Stockton, Illinois, United States §

Stockton usually has the most precipitation in May, June and September, with an average of 11 rainy days and 128 mm (5.0 inches) of precipitation per month.The driest months in Stockton are January, November and December. On average, 50 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Stockton, 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) 57 (2.2) 58 (2.3) 72 (2.8) 96 (3.8) 145 (5.7) 120 (4.7) 84 (3.3) 100 (3.9) 117 (4.6) 110 (4.3) 45 (1.8) 48 (1.9)
Average precipitation days (≥ 1 mm) 8 8 10 12 14 11 11 8 10 12 7 6

Monthly sunshine hours in Stockton, Illinois, United States §

The sunniest months in Stockton are June, July and August, when the sun shines an average of 10 hours 58 minutes a day.Least sunny months in Stockton: January, February and December receive an average of 5 hours 32 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Stockton, 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 130 191 229 239 262 323 358 328 271 207 192 181
Mean daily daylight hours 9h 28m 10h 34m 11h 58m 13h 24m 14h 36m 15h 12m 14h 53m 13h 48m 12h 25m 11h 0m 9h 45m 9h 7m

Solar UV radiation in Stockton, Illinois, United States §

Stockton experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High 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 3. For more detailed information, check out our hourly Stockton UV Index data.

Average daily maximum UV levels by month for Stockton, 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 4 6 8 9 10 10 9 8 5 3 2