nomadseason

Monthly climate in Thomson, Illinois, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Thomson 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 -33 °C (-27 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1089 mm (42.9 inches) and receives 120 rainy days on the 1 mm (0.04 inches) threshold annually.Thomson enjoys an average of 2891 hours of sunshine throughout the year, and daylight varies from 9 hours 9 minutes to 15 hours 10 minutes per day.

Monthly average temperatures in Thomson, Illinois, United States §

The warmest months in Thomson 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 0 °C (23 - 31 °F) throughout the day. On average each year, Thomson experiences 89 days above 25 °C (77.0 °F) and 118 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Thomson, 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 12°C
(53°F)		 20°C
(69°F)		 24°C
(75°F)		 28°C
(82°F)		 34°C
(93°F)		 34°C
(93°F)		 34°C
(93°F)		 34°C
(93°F)		 33°C
(92°F)		 31°C
(89°F)		 23°C
(74°F)		 20°C
(68°F)
Mean maximum 8°C
(47°F)		 13°C
(56°F)		 19°C
(67°F)		 26°C
(79°F)		 31°C
(88°F)		 32°C
(91°F)		 33°C
(92°F)		 32°C
(90°F)		 32°C
(89°F)		 29°C
(85°F)		 17°C
(64°F)		 15°C
(59°F)
Average high -2°C
(29°F)		 1°C
(33°F)		 9°C
(48°F)		 14°C
(57°F)		 21°C
(71°F)		 27°C
(81°F)		 29°C
(84°F)		 28°C
(82°F)		 25°C
(77°F)		 17°C
(62°F)		 8°C
(46°F)		 4°C
(39°F)
Daily mean -5°C
(23°F)		 -4°C
(25°F)		 4°C
(39°F)		 9°C
(48°F)		 16°C
(61°F)		 22°C
(72°F)		 24°C
(76°F)		 22°C
(73°F)		 20°C
(67°F)		 12°C
(53°F)		 3°C
(38°F)		 -0°C
(31°F)
Average low -9°C
(16°F)		 -9°C
(16°F)		 -1°C
(31°F)		 4°C
(39°F)		 11°C
(53°F)		 17°C
(63°F)		 20°C
(67°F)		 17°C
(63°F)		 14°C
(58°F)		 7°C
(45°F)		 -1°C
(30°F)		 -4°C
(24°F)
Mean minimum -25°C
(-12°F)		 -23°C
(-9°F)		 -13°C
(8°F)		 -4°C
(25°F)		 3°C
(38°F)		 12°C
(55°F)		 15°C
(59°F)		 12°C
(55°F)		 7°C
(44°F)		 -2°C
(29°F)		 -10°C
(13°F)		 -14°C
(7°F)
Minimum -32°C
(-25°F)		 -33°C
(-27°F)		 -22°C
(-8°F)		 -8°C
(18°F)		 -1°C
(31°F)		 9°C
(49°F)		 13°C
(56°F)		 11°C
(53°F)		 3°C
(38°F)		 -5°C
(24°F)		 -16°C
(3°F)		 -21°C
(-6°F)

Compare climate in Thomson with other places

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

Monthly average precipitation in Thomson, Illinois, United States §

Thomson usually has the most precipitation in May, June and September, with an average of 12 rainy days and 132 mm (5.2 inches) of precipitation per month.The driest months in Thomson are January, November and December. On average, 52 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Thomson, 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) 58 (2.3) 59 (2.3) 81 (3.2) 103 (4.0) 145 (5.7) 136 (5.3) 90 (3.6) 89 (3.5) 116 (4.6) 113 (4.5) 49 (1.9) 50 (2.0)
Average precipitation days (≥ 1 mm) 8 9 10 12 15 11 11 9 10 12 7 6

Monthly sunshine hours in Thomson, Illinois, United States §

The sunniest months in Thomson are June, July and August, when the sun shines an average of 10 hours 52 minutes a day.Least sunny months in Thomson: January, February and December receive an average of 5 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Thomson, 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 127 186 224 238 258 320 355 324 271 206 191 184
Mean daily daylight hours 9h 30m 10h 35m 11h 58m 13h 22m 14h 34m 15h 10m 14h 50m 13h 46m 12h 25m 11h 1m 9h 47m 9h 9m

Solar UV radiation in Thomson, Illinois, United States §

Thomson 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, February 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 Thomson UV Index data.

Average daily maximum UV levels by month for Thomson, 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 6 4 2