Naperville, IL Weather

Naperville, 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 86.80 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 14.20 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 24 degrees Fahrenheit, and fairly limited during winter with an average difference of 18 degrees Fahrenheit.

The annual average precipitation at Naperville is 37.94 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is August with an average rainfall of 4.60 Inches.

Weather Data

Current Conditions

(Updated: 7:52 PM CDT TUE OCT 7 2008)

Light Rain, 61°F	Humidity: 93%	Dewpoint: 59°F
	Wind Speed: SE 9 MPH	Heat Index: 61°F
	Barometer: 29.84 in.	Wind Chill: 60°F

Weather Forecast

(Generated: 3:59 PM CDT TUE OCT 07 2008)

		Tonight: Showers and isolated thunderstorms. Lows in the mid 50s. South winds 10 to 15 mph in the evening shifting to the west after midnight. Chance of precipitation 80 percent. Average rainfall amounts 1/4 to 1/2 inch expected.
	Lo: 55°F
	Hi: 69°F	Wednesday: Mostly cloudy with a 40 percent chance of showers in the morning...Then partly sunny in the afternoon. Highs in the upper 60s. West winds around 10 mph.
	Lo: 51°F
	Hi: 71°F	Thursday: Partly cloudy. Highs in the lower 70s. Light and variable winds.
	Lo: 50°F
	Hi: 75°F	Friday: Mostly sunny. Highs in the mid 70s.
	Lo: 55°F
	Hi: 79°F	Saturday: Mostly sunny. Highs in the upper 70s.
	Lo: 55°F
	Hi: 75°F	Sunday: Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.
	Lo: 61°F
	Hi: 79°F	Columbus day: Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the lower 60s. Highs in the upper 70s.
	Lo: 51°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Gibbous Moon	Civil Twilight: 6:27 AM CDT	Sunrise: 6:55 AM CDT
		Sunset: 6:24 PM CDT	Civil Twilight: 6:52 PM CDT

Normal Climate

Normal Temperatures

(WHEATON 3 SE Weather station, 4.63 miles from Naperville)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	32.0	38.0	50.0	62.8	74.8	83.8	86.8	85.0	78.4	66.5	50.0	36.9	62.1
Mean °F	23.1	28.5	39.2	50.2	61.2	70.6	74.8	73.3	65.9	54.3	40.9	28.7	50.9
Min °F	14.2	18.9	28.4	37.6	47.6	57.4	62.8	61.5	53.4	42.1	31.7	20.5	39.7

Normal Precipitation