Chicago, IL Weather

Chicago, IL climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.

The warmest month of the year is July with an average maximum temperature of 84.40 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 18.30 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 18 degrees Fahrenheit, and fairly limited during winter with an average difference of 14 degrees Fahrenheit.

The annual average precipitation at Chicago is 38.01 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is June with an average rainfall of 4.30 Inches.

Weather Data

Current Conditions

(Updated: 4:51 PM CST FRI NOV 20 2009)

Mostly Cloudy, 50°F	Humidity: 66%	Dewpoint: 39°F
	Wind Speed: SW 5.8 MPH (5 KT)	Heat Index: 50°F
	Barometer: 30.15 in.	Wind Chill: 48°F

Weather Forecast

(Generated: 2:49 PM CST FRI NOV 20 2009)

		Tonight: Mostly clear. Patchy fog after midnight. Lows in the upper 30s...Except in the mid 40s downtown. Light and variable winds.
	Lo: 39°F
	Hi: 55°F	Saturday: Mostly sunny. Patchy fog early in the morning. Mild. Highs in the mid 50s. Light and variable winds in the morning becoming southeast around 10 mph early in the afternoon...Then becoming light and variable late in the afternoon.
	Lo: 40°F
	Hi: 55°F	Sunday: Partly cloudy. Continued mild. Highs in the mid 50s. Southeast winds around 10 mph.
	Lo: 41°F
	Hi: 51°F	Monday: Partly sunny. Highs in the lower 50s.
	Lo: 45°F
	Hi: 50°F	Tuesday: Cloudy with a 40 percent chance of showers. Highs around 50.
	Lo: 35°F
	Hi: 45°F	Wednesday: Mostly cloudy with a 30 percent chance of rain showers. Highs in the mid 40s.
	Lo: 31°F
	Hi: 45°F	Thanksgiving day: Mostly cloudy with a 20 percent chance of rain showers and snow showers. Lows in the lower 30s. Highs in the mid 40s.
	Lo: 31°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Crescent Moon	Civil Twilight: 6:15 AM CST	Sunrise: 6:45 AM CST
		Sunset: 4:26 PM CST	Civil Twilight: 4:56 PM CST

Normal Climate

Normal Temperatures

(CHICAGO UNIVERSITY Weather station, 5.48 miles from Chicago)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	32.2	37.4	47.4	58.9	70.2	80.3	84.4	82.7	76.2	64.3	49.4	37.1	60.0
Mean °F	25.3	30.7	39.8	50.2	60.8	70.6	75.4	74.0	66.8	55.3	42.3	30.3	51.8
Min °F	18.3	23.9	32.2	41.5	51.3	60.8	66.3	65.3	57.4	46.2	35.1	23.5	43.5

Normal Precipitation