Aviston, IL Weather

Aviston, 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 30's.

The warmest month of the year is July with an average maximum temperature of 87.70 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 18.80 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 21 degrees Fahrenheit, and fairly limited during winter with an average difference of 19 degrees Fahrenheit.

The annual average precipitation at Aviston is 40.64 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is June with an average rainfall of 4.44 Inches.

Weather Data

Current Conditions

(Updated: 5:55 AM CST TUE NOV 24 2009)

Overcast, 51°F	Humidity: 97%	Dewpoint: 50°F
	Wind Speed: S 5.8 MPH (5 KT)	Heat Index: 51°F
	Barometer: 30.00 in.	Wind Chill: 49°F

Weather Forecast

(Generated: 4:05 AM CST TUE NOV 24 2009)

	Hi: 55°F	Today: Cloudy. Chance of rain in the morning...Then rain likely and isolated thunderstorms in the afternoon. High in the mid 50s. South wind 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of rain 70 percent.
	Lo: 40°F
	Hi: 50°F	Wednesday: Mostly cloudy. High around 50. West wind 10 to 15 mph with gusts to around 25 mph.
	Lo: 35°F
	Hi: 41°F	Thanksgiving day: Blustery. Mostly cloudy. High in the lower 40s. West wind 10 to 20 mph with gusts to around 30 mph.
	Lo: 30°F
	Hi: 49°F	Friday: Partly cloudy. High in the upper 40s.
	Lo: 31°F
	Hi: 51°F	Saturday: Mostly clear. Low in the lower 30s. High in the lower 50s.
	Lo: 35°F
	Hi: 50°F	Sunday: Partly cloudy. Low in the mid 30s. High around 50.
	Lo: 39°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Gibbous Moon	Civil Twilight: 6:20 AM CST	Sunrise: 6:49 AM CST
		Sunset: 4:40 PM CST	Civil Twilight: 5:08 PM CST

Normal Climate

Normal Temperatures

(CARLYLE RESERVOIR Weather station, 12.93 miles from Aviston)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	36.3	42.6	53.7	64.6	74.6	83.6	87.7	86.0	79.4	68.0	54.0	41.7	64.4
Mean °F	27.6	32.8	43.4	53.7	63.8	72.9	77.2	75.3	68.1	56.4	44.5	32.8	54.0
Min °F	18.8	22.9	33.1	42.8	53.0	62.1	66.6	64.6	56.7	44.8	34.9	23.8	43.7

Normal Precipitation