December and Winter Climate Data for Chicago and Rockford

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Climate Statistics for Chicago and Rockford for the Month of December

 DECEMBER TEMPERATURE DATA

 AVG HIGH

 AVG LOW

 AVG TEMP

 RECORD WARM/YEAR

RECORD COLD/YEAR 

 CHICAGO

 34.8

20.7

 27.7

 43.4 in 1877

14.3 in 1983

 ROCKFORD

 33.2

 17.7 

  25.4 

 35.5 in 1923

12.5 in 2000

DECEMBER PRECIPITATION DATA

 AVG PRECIP

 RECORD WETTEST/YEAR

 RECORD DRIEST/YEAR

 CHICAGO

 2.25

8.56 INCHES in 1982

0.16 INCHES in 1896 

 ROCKFORD

 1.98

5.04 INCHES in 1971

0.17 INCHES in 1907

DECEMBER SNOWFALL DATA

 AVG SNOWFALL

 RECORD SNOWIEST/YEAR

 LEAST SNOW/YEAR

 CHICAGO

 8.5

33.3 INCHES in 1951

TRACE in 1889, 1912 

 ROCKFORD

 11.3

30.1 INCHES in 2000

TRACE in 1905, 1908, 1910, 1939

 
WINTER TEMPERATURE DATA

 AVG HIGH

 AVG LOW

 AVG TEMP

 RECORD WARM/WINTER

RECORD COLD/WINTER 

 CHICAGO

 33.6

20.7

 26.4

 37.2 in 1877-1878

 18.3 in 1903-1904

 ROCKFORD

 32.2

 16.3 

  24.2 

 32.0 in 1931-1932

 14.1 in 1978-1979

WINTER PRECIPITATION DATA

 AVG PRECIP

 RECORD WETTEST AND DRIEST /WINTER

 CHICAGO

 5.77

13.79 INCHES in 1987
1.60 INCHES in 1930-1931

 ROCKFORD

 4.76

 10.38 INCHES in 1945-1946
1.28 INCHES in 2002-2003

WINTER SNOWFALL DATA

 AVG SNOWFALL

 RECORD SNOWIEST AND LEAST SNOW/WINTER

 CHICAGO

 28.4

80.6 INCHES in 1978-1979
5.7 INCHES in 1930-1931

 ROCKFORD

 29.2

 65.1 INCHES in 2007-2008
4.0 INCHES in 1927-1928

 

 

Official Outlooks from the Climate Prediction Center (CPC) 

December Temperature Outlook

December Precipitation Outlook

December Temperature Outlook from CPC December Precipitation Outlook from CPC

 

Winter Temperature Outlook

Winter Precipitation Outlook

Winter Temperature Outlook from CPC Winter Precipitation Outlook from CPC

 



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