Compare the Climate and Weather in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field Airport

This page lets you compare and contrast the weather and climate in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field Airport year round.

You can drill down to a specific season, month, and even day by clicking the graphs or using the navigation panel.

Map
(will replace Morris, Morris Municipal-James R Washburn Field Airport)

Average High and Low Temperature

Compare the Average High and Low Temperature in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F6416843048722NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The daily average high and low air temperature at 2 meters above the ground. The thin dotted lines are the corresponding perceived temperatures.
HighJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 31°F35°F47°F61°F72°F81°F83°F81°F74°F62°F48°F35°F
Chicago/Aurora Municipal Airport 30°F34°F47°F61°F72°F81°F83°F81°F74°F62°F47°F35°F
Lewis University Airport 32°F36°F48°F61°F72°F81°F84°F81°F75°F62°F48°F36°F
Joliet Regional Airport 32°F36°F48°F62°F72°F81°F84°F82°F75°F63°F49°F37°F
DuPage County Airport 31°F35°F47°F60°F71°F80°F83°F81°F74°F62°F48°F35°F
Morris, Morris Municipal-James R Washburn Field Airport 32°F36°F48°F62°F73°F81°F83°F81°F75°F63°F49°F36°F
LowJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 17°F21°F31°F41°F51°F60°F64°F62°F54°F43°F33°F22°F
Chicago/Aurora Municipal Airport 16°F19°F30°F40°F50°F59°F63°F61°F53°F41°F31°F21°F
Lewis University Airport 18°F21°F31°F41°F51°F60°F64°F62°F54°F43°F33°F23°F
Joliet Regional Airport 18°F21°F31°F41°F51°F60°F64°F62°F54°F43°F33°F23°F
DuPage County Airport 17°F20°F30°F40°F50°F60°F64°F62°F54°F43°F32°F22°F
Morris, Morris Municipal-James R Washburn Field Airport 18°F21°F31°F41°F51°F60°F64°F62°F54°F43°F33°F23°F

Oswego

Average Hourly Temperature in OswegoJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingcoldcoolwarmvery coldvery coldcomfortablecomfortable

Chicago/Aurora Municipal Airport

Average Hourly Temperature in Chicago/Aurora Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldcoldcoolwarmvery coldcomfortablecomfortable

Lewis University Airport

Average Hourly Temperature in Lewis University AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingcoldcoolcoolwarmvery coldvery coldcomfortable

Joliet Regional Airport

Average Hourly Temperature in Joliet Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldcoldcoolcoolwarmvery coldfreezingcomfortable

DuPage County Airport

Average Hourly Temperature in DuPage County AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingcoldcoolcoolwarmvery coldvery coldcomfortable

Morris, Morris Municipal-James R Washburn Field Airport

Average Hourly Temperature in Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoolwarmcomfortablecomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies

Compare the Chance of Clearer Skies in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%6942NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 44%45%48%49%51%57%65%67%67%59%49%43%
Chicago/Aurora Municipal Airport 44%45%48%49%51%57%65%68%67%59%49%43%
Lewis University Airport 43%44%47%49%50%56%64%67%66%59%48%43%
Joliet Regional Airport 43%44%47%49%50%56%64%67%66%59%48%43%
DuPage County Airport 43%44%47%48%50%57%65%67%66%58%48%43%
Morris, Morris Municipal-James R Washburn Field Airport 44%45%48%49%51%57%65%68%67%59%49%43%

Daily Chance of Precipitation

Compare the Daily Chance of Precipitation in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%391339NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Oswego 4.7d4.6d6.9d8.8d11.2d11.2d11.3d10.2d8.3d7.6d6.9d5.8d
Chicago/Aurora Municipal Airport 4.8d4.6d6.8d8.8d11.3d11.4d11.2d10.4d8.5d7.4d6.7d5.8d
Lewis University Airport 4.8d4.7d7.1d8.9d11.1d11.0d11.1d10.2d8.3d7.7d7.0d5.9d
Joliet Regional Airport 4.8d4.7d7.1d8.9d11.1d11.1d11.1d10.2d8.3d7.7d7.0d6.0d
DuPage County Airport 5.0d4.8d7.0d8.8d10.9d11.0d11.1d10.4d8.5d7.5d6.8d5.9d
Morris, Morris Municipal-James R Washburn Field Airport 4.7d4.6d7.2d9.2d11.3d11.1d11.0d10.3d8.3d7.7d7.0d6.1d

Average Monthly Rainfall

Compare the Average Monthly Rainfall in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in3.80.7NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
RainfallJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 0.8″1.0″1.7″3.0″3.5″3.7″3.4″3.5″3.0″2.6″2.3″1.4″
Chicago/Aurora Municipal Airport 0.7″0.9″1.7″2.9″3.5″3.8″3.4″3.5″3.0″2.5″2.2″1.3″
Lewis University Airport 0.9″1.0″1.8″3.0″3.6″3.7″3.4″3.5″3.0″2.6″2.4″1.5″
Joliet Regional Airport 0.9″1.1″1.8″3.0″3.6″3.8″3.4″3.5″3.0″2.6″2.4″1.5″
DuPage County Airport 0.8″1.0″1.7″3.0″3.5″3.7″3.4″3.6″3.1″2.6″2.3″1.4″
Morris, Morris Municipal-James R Washburn Field Airport 0.9″1.1″1.8″3.0″3.6″3.7″3.4″3.5″3.0″2.5″2.3″1.5″

Average Monthly Snowfall

Compare the Average Monthly Snowfall in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in3.94.24.13.6NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The average snowfall accumulated over the course of a sliding 31-day period centered on the day in question.
SnowfallJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 3.7″3.8″1.9″0.2″0.0″0.0″0.0″0.0″0.0″0.1″0.9″3.4″
Chicago/Aurora Municipal Airport 4.0″4.0″2.1″0.3″0.0″0.0″0.0″0.0″0.0″0.1″1.2″3.9″
Lewis University Airport 3.8″4.1″2.1″0.3″0.0″0.0″0.0″0.0″0.0″0.1″0.9″3.4″
Joliet Regional Airport 3.6″3.7″1.7″0.2″0.0″0.0″0.0″0.0″0.0″0.1″0.7″3.0″
DuPage County Airport 4.1″4.1″2.1″0.3″0.0″0.0″0.0″0.0″0.0″0.1″1.0″3.7″
Morris, Morris Municipal-James R Washburn Field Airport 3.4″3.5″1.5″0.2″0.0″0.0″0.0″0.0″0.0″0.0″0.7″3.1″

Hours of Daylight

Compare the Hours of Daylight in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr15.29.2NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The number of hours during which the Sun is at least partly above the horizon.
DaylightJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 9.6h10.6h12.0h13.4h14.6h15.2h14.8h13.8h12.4h11.0h9.8h9.2h
Chicago/Aurora Municipal Airport 9.5h10.6h12.0h13.4h14.6h15.2h14.8h13.8h12.4h11.0h9.8h9.2h
Lewis University Airport 9.6h10.6h12.0h13.4h14.6h15.1h14.8h13.8h12.4h11.0h9.8h9.2h
Joliet Regional Airport 9.6h10.6h12.0h13.4h14.6h15.1h14.8h13.8h12.4h11.1h9.8h9.2h
DuPage County Airport 9.5h10.6h12.0h13.4h14.6h15.2h14.9h13.8h12.4h11.0h9.8h9.2h
Morris, Morris Municipal-James R Washburn Field Airport 9.6h10.6h12.0h13.4h14.5h15.1h14.8h13.8h12.4h11.1h9.8h9.2h

Chance of Muggy Conditions

Compare the Chance of Muggy Conditions in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%4642NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportOswegoOswego
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Oswego 0.0d0.0d0.0d0.1d1.7d7.6d13.6d12.0d4.7d0.4d0.0d0.0d
Chicago/Aurora Municipal Airport 0.0d0.0d0.0d0.1d1.7d7.5d13.4d11.7d4.5d0.4d0.0d0.0d
Lewis University Airport 0.0d0.0d0.0d0.1d1.8d7.6d13.5d12.3d5.0d0.5d0.0d0.0d
Joliet Regional Airport 0.0d0.0d0.0d0.1d2.2d8.2d14.4d12.8d5.1d0.5d0.0d0.0d
DuPage County Airport 0.0d0.0d0.0d0.1d1.7d6.9d12.5d10.9d4.2d0.4d0.0d0.0d
Morris, Morris Municipal-James R Washburn Field Airport 0.0d0.0d0.0d0.1d1.7d7.5d13.9d12.2d4.6d0.3d0.0d0.0d

Average Wind Speed

Compare the Average Wind Speed in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph12.57.5NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswego
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec
Oswego 12.112.112.312.110.69.18.07.79.010.511.511.6
Chicago/Aurora Municipal Airport 12.112.112.412.110.69.18.07.79.010.511.511.6
Lewis University Airport 12.212.112.412.110.79.18.07.89.110.611.611.7
Joliet Regional Airport 12.012.012.312.210.79.18.07.79.010.511.511.6
DuPage County Airport 12.412.312.412.210.89.38.28.09.210.711.711.8
Morris, Morris Municipal-James R Washburn Field Airport 11.911.912.312.110.69.07.87.68.910.411.411.5

Average Water Temperature

Compare the Average Water Temperature in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F7335NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswego
The daily average wide-area surface water temperature.
Water Temp.JanFebMarAprMayJunJulAugSepOctNovDec
Oswego 38°F35°F36°F39°F45°F57°F69°F72°F67°F58°F49°F42°F
Chicago/Aurora Municipal Airport 38°F35°F36°F39°F45°F57°F69°F72°F67°F58°F49°F42°F
Lewis University Airport 38°F35°F36°F39°F45°F57°F69°F72°F67°F58°F49°F42°F
Joliet Regional Airport 38°F35°F36°F39°F45°F57°F69°F72°F67°F58°F49°F42°F
DuPage County Airport 38°F36°F36°F39°F45°F57°F69°F72°F67°F57°F48°F42°F
Morris, Morris Municipal-James R Washburn Field Airport 38°F35°F36°F39°F45°F57°F69°F72°F67°F58°F49°F42°F

Tourism Score

Compare the Tourism Score in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.6NowNowJoliet Regional AirportJoliet Regional AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswego
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score

Compare the Beach/Pool Score in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.3NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswego
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season

Compare the Growing Season in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowJoliet Regional AirportJoliet Regional AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days

Compare the Growing Degree Days in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°FNowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The average growing degree days accumulated over the course of the year, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy

Compare the Average Daily Incident Shortwave Solar Energy in Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field AirportJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh6.91.7NowNowJoliet Regional AirportJoliet Regional AirportDuPage County AirportDuPage County AirportLewis University AirportLewis University AirportChicago/Aurora Municipal AirportChicago/Aurora Municipal AirportOswegoOswegoMorris, Morris Municipal-James R Washburn Field AirportMorris, Morris Municipal-James R Washburn Field Airport
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec
Oswego 2.02.94.15.36.26.76.76.04.93.52.21.7
Chicago/Aurora Municipal Airport 2.02.94.15.36.26.86.76.04.93.52.21.7
Lewis University Airport 2.02.94.15.36.26.76.76.04.93.52.21.7
Joliet Regional Airport 2.02.94.25.36.26.76.76.04.93.52.21.7
DuPage County Airport 2.02.94.15.36.26.86.76.04.93.52.21.7
Morris, Morris Municipal-James R Washburn Field Airport 2.13.04.25.36.26.76.76.05.03.52.31.8

This report illustrates the typical weather for Oswego; Chicago/Aurora Municipal Airport; Lewis University Airport; Joliet Regional Airport; DuPage County Airport; and Morris, Morris Municipal-James R Washburn Field Airport year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:

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