Illinois, United States Climate

Weather: 31.7°C/89.06°F, Wind SW at 3.39 km/h, 41% Humidity, 0% Chance of rain

United States
(Photo by Dayne Topkin on Unsplash)
Contents

Illinois Climate Summary

Located at an elevation of 251.72 meters (825.85 feet) above sea level, Illinois has a Humid continental, no dry season, hot summer climate (Classification: Dfa). The city’s yearly temperature is 12.07ºC (53.73ºF) and it is -0.57% lower than United States’s averages. Illinois typically receives about 38.16 millimeters (1.5 inches) of precipitation and has 87.73 rainy days (24.04% of the time) annually.

Country United States
Longitude -89.3985283
Latitude 40.6331249
Attitude/Elevation 251.72m (825.85ft)
Local time Friday 07:04
Annual high temperature 15.14ºC (59.25ºF)
Annual low temperature 6.9ºC (44.42ºF)
Average annual precip. 38.16mm (1.5in)
Warmest month July (27.72ºC / 81.9ºF)
Coldest Month January (-7.09ºC / 19.24ºF)
Wettest Month May (71.99mm / 2.83in)
Driest Month December (17.82mm / 0.7in)
Number of days with rainfall (≥ 1.0 mm) 87.73 days (24.04%)
Days with no rain 277.27 days (75.96%)
Humidity 77.51%

Climate Illinois: Monthly Averages

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
Record high °C (°F) 17.0(62.6) 20.0(68.0) 27.0(80.6) 28.0(82.4) 34.0(93.2) 34.0(93.2) 35.0(95.0) 35.0(95.0) 35.0(95.0) 30.0(86.0) 25.0(77.0) 19.0(66.2) 35.0(95.0)
Average high °C (°F) -1.0(30.2) 1.4(34.52) 9.03(48.25) 15.53(59.95) 22.0(71.6) 26.49(79.68) 27.72(81.9) 27.14(80.85) 24.45(76.01) 17.23(63.01) 8.89(48.0) 2.76(36.97) 15.14(59.25)
Daily mean °C (°F) -3.43(25.83) -1.4(29.48) 5.82(42.48) 12.19(53.94) 18.93(66.07) 23.53(74.35) 24.9(76.82) 23.77(74.79) 20.48(68.86) 13.62(56.52) 5.93(42.67) 0.48(32.86) 12.07(53.73)
Average low °C (°F) -7.09(19.24) -5.63(21.87) 1.17(34.11) 6.66(43.99) 13.0(55.4) 17.26(63.07) 18.69(65.64) 17.47(63.45) 14.28(57.7) 8.28(46.9) 1.57(34.83) -2.82(26.92) 6.9(44.42)
Record low °C (°F) -30.0(-22.0) -22.0(-7.6) -22.0(-7.6) -7.0(19.4) 1.0(33.8) 7.0(44.6) 8.0(46.4) 6.0(42.8) 1.0(33.8) -5.0(23.0) -15.0(5.0) -20.0(-4.0) -30.0(-22.0)
Average precipitation mm (inches) 27.18(1.07) 22.3(0.88) 36.54(1.44) 55.62(2.19) 71.99(2.83) 58.49(2.3) 42.36(1.67) 34.48(1.36) 43.73(1.72) 25.49(1.0) 21.96(0.86) 17.82(0.7) 38.16(1.5)
Average precipitation days (≥ 1.0 mm) 3.82 4.73 6.45 9.0 12.64 10.55 10.91 7.73 7.09 6.36 4.45 4.0 7.31
Average relative humidity (%) 80.88 79.83 74.99 73.33 77.38 80.88 84.72 82.52 75.85 69.35 71.96 78.37 77.51
Mean monthly sunshine hours 5.93 6.46 9.23 11.7 12.68 13.42 13.37 12.85 11.43 7.89 6.94 6.27 9.85

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Illinois in recent years.

Illinois

Illinois Temperature by Month

July
24.9°C | 76.82°F
August
23.77°C | 74.79°F
June
23.53°C | 74.35°F
September
20.48°C | 68.86°F
May
18.93°C | 66.07°F
October
13.62°C | 56.52°F
April
12.19°C | 53.94°F
November
5.93°C | 42.67°F
March
5.82°C | 42.48°F
December
0.48°C | 32.86°F
February
-1.4°C | 29.48°F
January
-3.43°C | 25.83°F

Historical Data

Summary
  • 2010
  • 2011
  • 2012
  • 2013
  • 2014
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
Temperature Max Average Min
Max Temperature 9.0°C (48.2°F) 0.72°C (33.3°F) -11.0°C (12.2°F)
Avg Temperature 6.0°C (42.8°F) -1.62°C (29.08°F) -13.0°C (8.6°F)
Min Temperature 1.0°C (33.8°F) -5.24°C (22.57°F) -17.0°C (1.4°F)
Dew Point Max Average Min
Dew Point 3.0°C (37.4°F) -5.31°C (22.44°F) -16.0°C (3.2°F)
Precipitation Max Average Min Sum
Precipitation 10.2mm | 0.4in 1.61mm | 0.06in 0.0mm | 0in 46.6mm | 1.83in
Snowdepth 6.0mm | 0.24in 0.53mm | 0.02in 0.0mm | 0in 15.4mm | 0.61in
Wind Max Average Min
Wind 29.0kmh | 18.02mph 16.41kmh | 10.2mph 7.0kmh | 4.35mph
Gust Wind 37.0kmh | 22.99mph 23.97kmh | 14.89mph 12.0kmh | 7.46mph
Sea Level Pressure Max Average Min
Sea Level Pressure 10.2mb 1.61mb 0.0mb
Illinois

Daily Observations

Time Temperature Dew Point Humidity Wind Speed Pressure Precipitation
February ° C | ° F ° C | ° F % Kph | Mph Hg | Mb Total (mm/in)
2020-02-01 1 | 33.8 0 | 32.0 94 13 | 8.08 30.0 | 1016 1.5 | 0.06
2020-02-02 5 | 41.0 1 | 33.8 83 16 | 9.94 29.8 | 1009 0.0 | 0.0
2020-02-03 6 | 42.8 3 | 37.4 86 11 | 6.84 29.74 | 1007 0.2 | 0.01
2020-02-04 -0 | 32.0 -3 | 26.6 79 26 | 16.16 29.91 | 1013 0.5 | 0.02
2020-02-05 -2 | 28.4 -6 | 21.2 77 24 | 14.91 29.97 | 1015 6.6 | 0.26
2020-02-06 -3 | 26.6 -4 | 24.8 92 18 | 11.18 29.62 | 1003 2.7 | 0.11
2020-02-07 -3 | 26.6 -7 | 19.4 78 10 | 6.21 29.8 | 1009 0.0 | 0.0
2020-02-08 -3 | 26.6 -4 | 24.8 91 10 | 6.21 30.12 | 1020 2.3 | 0.09
2020-02-09 -1 | 30.2 -2 | 28.4 91 19 | 11.81 30.09 | 1019 3.0 | 0.12
2020-02-10 -1 | 30.2 -3 | 26.6 84 11 | 6.84 30.18 | 1022 0.0 | 0.0
2020-02-11 -0 | 32.0 -5 | 23.0 76 12 | 7.46 30.18 | 1022 0.0 | 0.0
2020-02-12 0 | 32.0 -3 | 26.6 82 10 | 6.21 30.0 | 1016 7.0 | 0.28
2020-02-13 -11 | 12.2 -10 | 14.0 89 23 | 14.29 30.12 | 1020 2.7 | 0.11
2020-02-14 -13 | 8.6 -16 | 3.2 82 11 | 6.84 30.59 | 1036 0.0 | 0.0
2020-02-15 -4 | 24.8 -7 | 19.4 84 23 | 14.29 30.21 | 1023 0.1 | 0.0
2020-02-16 -1 | 30.2 -2 | 28.4 93 7 | 4.35 30.15 | 1021 0.0 | 0.0
2020-02-17 3 | 37.4 1 | 33.8 95 17 | 10.56 29.94 | 1014 6.7 | 0.26
2020-02-18 1 | 33.8 -1 | 30.2 87 18 | 11.18 30.12 | 1020 0.1 | 0.0
2020-02-19 -5 | 23.0 -12 | 10.4 61 16 | 9.94 30.59 | 1036 0.0 | 0.0
2020-02-20 -7 | 19.4 -15 | 5.0 53 16 | 9.94 30.71 | 1040 0.0 | 0.0
2020-02-21 -3 | 26.6 -16 | 3.2 40 13 | 8.08 30.59 | 1036 0.0 | 0.0
2020-02-22 3 | 37.4 -6 | 21.2 58 19 | 11.81 30.27 | 1025 0.0 | 0.0
2020-02-23 5 | 41.0 1 | 33.8 81 16 | 9.94 30.03 | 1017 0.1 | 0.0
2020-02-24 2 | 35.6 2 | 35.6 92 16 | 9.94 29.83 | 1010 10.2 | 0.4
2020-02-25 3 | 37.4 2 | 35.6 95 16 | 9.94 29.74 | 1007 2.6 | 0.1
2020-02-26 -3 | 26.6 -7 | 19.4 76 29 | 18.02 29.91 | 1013 0.3 | 0.01
2020-02-27 -8 | 17.6 -15 | 5.0 60 24 | 14.91 30.18 | 1022 0.0 | 0.0
2020-02-28 -8 | 17.6 -14 | 6.8 62 19 | 11.81 30.33 | 1027 0.0 | 0.0
2020-02-29 -0 | 32.0 -6 | 21.2 67 13 | 8.08 30.18 | 1022 0.0 | 0.0

Illinois 10 Year Historical Weather Data

Nearby locations

Comments (0)

  • Latest first
  • Highest rated
Be the first to comment on this page