Snow Across the Great Lakes, Central Appalachians, and Northeast; Unsettled Weather in the West

Light to moderate snow will continue into Saturday over the Great Lakes, Central Appalachians, and Northeast. This weekend into next week, a series of atmospheric rivers will bring gusty winds, periods of heavy rain, and mountain snow to northern California and the Pacific Northwest. Colder temperatures are in store for the weekend from the Great Lakes to East Coast. Read More >

Last Updated: 8/25/2023

Temperature (in degrees Fahrenheit)
Highest Temperature	105 degrees on July 24, 1934
Lowest Temperature	-27 degrees on January 20, 1985

Warmest Month	81.3 degrees in July 1955
Coldest Month	10.1 degrees in January 1977

Warmest Season	76.7 degrees in Summer of 2020
Coldest Season	18.3 degrees in Winter of 1903-04

Warmest Year	54.5 degrees in 2012
Coldest Year	45.1 degrees in 1875

Highest Heat Index	Hourly observations only: 118 degrees on July 13, 1995 and August 24, 2023 Including intra-hour observations (since 1996): 120 degrees on August 24, 2023

Lowest Relative Humidity	12% on April 20, 2019

Highest Dew Point	83 degrees on July 30, 1999
Lowest Dew Point	-40 degrees on January 20, 1985

Precipitation (in inches)
Wettest Year	50.86 in 2008
Driest Year	22.22 in 1962

Wettest Season	23.48 Summer (Jun – Aug) of 1987
Driest Season	1.60 Winter (Dec – Feb) of 2002 - 2003

Wettest Month	17.10 in August 1987
Driest Month	0.01 in September 1979

Greatest in 24 Hours	9.35 on August 13th-14th 1987
Greatest Calendar Day	6.86 on July 23, 2011

Snowfall (in inches)
Seasonal (Jul – Jun) Greatest	89.7 in 1978 - 1979
Seasonal (Jul – Jun) Least	9.8 in 1920 - 1921

Winter (Dec – Feb) Greatest	80.6 in 1978 – 1979
Winter (Dec – Feb) Least	5.7 in 1930 - 1931

Greatest Total:
Month	42.5 in January, 1918
Storm	23.0 on January 26 – 27, 1967
24 Hours	20.0 on February 1-2, 2011
Calendar Day	18.6 on January 2, 1999
Snow Depth	29 inches on January 14, 1979

Pressure (in inches of Mercury)
Highest	30.98 on Feb 16, 1989
Lowest	28.70 on March 12, 1923

Wind (in mph)
Highest Gust	87 on February 12, 1894
Coldest Wind Chill	-82 on December 24, 1983

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Snow Across the Great Lakes, Central Appalachians, and Northeast; Unsettled Weather in the West

Official Extreme Weather Records for Chicago, IL