St. Patrick's Day Weather for Northern Illinois:   Statistics for Chicago and Rockford

 

Chicago:
The following statistics comprises 141 years of data. However snowfall data started in 1885 so it comprises 129 years. Data collection began at the University of Chicago, then at Midway, and currently at O'Hare which is now the official station for Chicago.

Graph of High Temperatures on St. Patricks Day

Frequency distribution of high temperatures for Chicago. This dataset shows that the most common range of high temperatures is 30-39 degrees, followed closely by 40-49 degrees. The normal high temperature at Chicago is 47 degrees, which falls in one of those ranges. The record high temperature on St. Patrick’s Day is 82 degrees set in 2012 . The record lowest high temperature on St. Patrick’s Day is 11 degrees, which occurred in 1941. In 2013, the high temperature was 35 degrees.

Graph of Low Temperatures in Chicago on St. Patrick's Day

Frequency distribution of low temperatures for Chicago. This dataset shows that the most frequent range of low temperatures on St. Patrick’s Day is in the 30 to 39 degree range. The normal low temperature at Chicago is 29 degrees which falls just below that range. The record low temperature for Chicago on St. Patrick’s Day is -1, which was set in 1900. The record highest low on St. Patrick’s Day is 49 in 1894. The low temperature in 2013 was 26 degrees.

Grapah of Precipitation at Chicago on St. Patrick's Day

Frequency distribution of precipitation for Chicago. This dataset shows that the most frequent amount of precipitation recorded on St. Patrick’s Day is 0.00”, which accounts for 46% of the days in the dataset. The next most frequent range is a Trace closely followed by the 0.02” to 0.25” range. The highest amount of precipitation on St. Patrick’s Day occurred in 1965 when 1.42” of precipitation fell. This is the only instance of over an inch of precipitation on St. Patrick’s Day. There was no precipitation in 2013.

Graph of Snowfall on St. Patrick's Day in Chicago

Frequency distribution of snowfall for Chicago. This dataset shows that the most frequent amount of snowfall recorded on St. Patrick’s Day is 0.0”, which accounts for 66% of the days in the dataset. The next most frequent range is a Trace, followed by 0.1” to 0.9”. The highest amount of snowfall recorded on St. Patrick’s Day occurred in 1984 when 4.1” of snow fell. In 2013 no snow fell.

 

ADDITIONAL ST. PATRICK'S DAY CLIMATE DATA     ( * MEANS LAST OCCURRENCE)

MAX TEMP
WARMEST

MIN TEMP
WARMEST
PCPN
WETTEST
SNOW
MOST
82
2012
58
2012 
1.42
1965
4.1
1984
74
2009 *
49
1894 
0.82
1919
3.7
1904, 1965
73
2003 *
48
2011
0.59
1991
2.7
1993
68
1945
44
1927 
0.51
1904
67
2011 * 
43
1945
0.49
1998
64
1968 *
42
1999 * 
0.47
1946
63
2010 *
41
2009 *
0.45
1980
62
2000 *
40
2003 *
0.37
1930
60
1927
39
1919 
0.35
1973
59
1999 *
38
1918 *
0.32
1989
 
MAX TEMP
COLDEST
MIN TEMP
COLDEST
PCPN
DRIEST
SNOW
LEAST
11
1941
0
1900
0.00
* 2013
0.0
* 2013
15
1902
1
1941
T
*2002
T
* 2008
23
1939
3
1902
0.01
* 1970
0.1
1892, 1930
1988, 1996
24
1875, 1885
1892
6
1885
0.02
* 2008
25
1967
9
1875
0.03
1921, 1922, 1938 
26
1900
11
1939
0.04
1874
27
1906
12
1906, 1993 
0.05
1903, 1979, 1986 
28
1876, 1916 
13
1967
0.06
1960, 2005
29
1959, 1993
14
1909
0.07
2004 
30
1887, 1893
1960
15
1876, 1877
0.11
1882

ACS 3/07/2014


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