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Chicago’s Official Records
Temperature (in degrees Fahrenheit)
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Highest Temperature…………………….... |
105 degrees on July 24, 1934 |
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Lowest Temperature.…………………….... |
-27 degrees on January 20, 1985 |
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Warmest Month…………………………...... |
81.3 degrees in July 1955 |
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Coldest Month……...……………………..... |
10.1 degrees in January 1977 |
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Warmest Season………………………….... |
76.4 degrees in Summer of 1955 |
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Coldest Season……..……………………... |
18.3 degrees in Winter of 1903-04 |
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Warmest Year...…………………………..... |
54.4 degrees in 1921 |
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Coldest Year………..……………………..... |
45.1 degrees in 1875 |
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Highest Dew Point…………………………. |
83 on July 29th-30th 1999 |
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Lowest Relative Humidity............................. |
13%: 5/10/1934; 4/8/1971; 4/11/1956 |
Precipitation (in inches)
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Wettest Year…..…………………………..... |
50.86 in 2008 |
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Driest Year….……...……………………..... |
22.22 in 1962 |
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Wettest Season…..………………………..... |
23.48 Summer (Jun – Aug) of 1987 |
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Driest Season……………………………..... |
1.60 Winter (Dec – Feb) of 2002 - 2003 |
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Wettest Month...…………………………..... |
17.10 in August 1987 |
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Driest Month...……..……………………..... |
0.01 in September 1979 |
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Greatest in 24 hours………………………... |
9.35 on August 13 – 14, 1987 |
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Greatest calendar day………..…………….. |
6.86 on July 23, 2011 |
Snowfall (in inches)
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Seasonal (Jul – Jun) Greatest..…………… |
89.7 in 1978 - 1979 |
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Seasonal (Jul – Jun) Least.……..……….... |
9.8 in 1920 - 1921 |
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Winter (Dec – Feb) Greatest………………. |
80.6 in 1978 – 1979 |
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Winter (Dec – Feb) Least…………………... |
5.7 in 1930 - 1931 |
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Greatest Total: |
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Month………………………………....... |
42.5 in January, 1918 |
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Storm.………………………………. .... |
23.0 on January 26 – 27, 1967 |
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24 hours.……………………………..... |
20.0 on February 1-2, 2011 |
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Calendar Day………………………..... |
18.6 on January 2, 1999 |
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Snow Depth………………………….... |
29 inches on January 14, 1979 |
Pressure (in inches of Mercury)
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Highest…………..………………………..... |
30.98 on Feb 16, 1989 |
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Lowest……….……..……………………..... |
28.70 on March 12, 1923 |
Wind (in mph)
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Highest Gust……………………………….. |
87 on February 12, 1894 |
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Coldest Wind Chill…..….…………………. |
-82 on December 24, 1983 |
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