Oswego, IL Weather

Oswego, 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 84.20 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 10.50 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 19 degrees Fahrenheit.

The annual average precipitation at Oswego is 38.39 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is July with an average rainfall of 4.39 Inches.

Weather Data

Current Conditions

(Updated: 3:52 AM CDT SAT MAR 20 2010)

Overcast, 37°F	Humidity: 79%	Dewpoint: 31°F
	Wind Speed: NE 18.4 MPH G 26.5 (16 MPH G 23 KT)	Heat Index: 37°F
	Barometer: 30.02 in.	Wind Chill: 27°F

Weather Forecast

(Generated: 4:06 AM CDT SAT MAR 20 2010)

	Hi: 30°F	Today: Snow. Snow accumulation of 1 to 2 inches. Much colder. Temperatures nearly steady in the lower 30s. Northeast winds 10 to 20 mph. Chance of precipitation 90 percent.
	Lo: 30°F
	Hi: 41°F	Sunday: Cloudy with a 20 percent chance of light rain. Highs in the lower 40s. Northeast winds 10 to 15 mph.
	Lo: 30°F
	Hi: 49°F	Monday: Sunny. Highs in the upper 40s. Northeast winds 10 to 15 mph.
	Lo: 31°F
	Hi: 59°F	Tuesday: Mostly sunny. Highs in the upper 50s.
	Lo: 39°F
	Hi: 60°F	Wednesday: Mostly cloudy with a 20 percent chance of showers. Highs around 60. Lows in the upper 30s.
	Lo: 31°F
	Hi: 51°F	Thursday: Partly cloudy with a 20 percent chance of rain showers. Highs in the lower 50s. Lows in the lower 30s.
	Lo: 31°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Crescent Moon	Civil Twilight: 6:28 AM CDT	Sunrise: 6:56 AM CDT
		Sunset: 7:05 PM CDT	Civil Twilight: 7:33 PM CDT

Normal Climate

Normal Temperatures

(AURORA Weather station, 6.24 miles from Oswego)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	29.4	34.9	46.4	59.3	71.5	80.7	84.2	82.1	75.2	63.1	47.2	34.2	59.0
Mean °F	20.0	25.3	36.3	47.8	59.0	68.2	72.4	70.3	62.6	50.7	37.5	25.3	48.0
Min °F	10.5	15.6	26.1	36.2	46.4	55.7	60.6	58.4	49.9	38.2	27.7	16.4	36.8

Normal Precipitation