St. Patrick's Day Climate Data for Chicago and Rockford

Updated March 2023.

Chicago
Rockford
Links

Chicago

Official weather records for Chicago date back to 1871 for temperatures and precipitation, and to 1884 for snowfall. Observation location history for Chicago can be found here.

St. Patrick's Day Climate Data for Chicago

Top 10 Warmest (Highs)			Top 10 Coldest (Highs)
1	2012	82	1	1941	11
2	2009	74	2	1902	15
	1894	74	3	1939	23
4	2022	73	4	1892	24
	2003	73		1885	24
	1966	73		1875	24
7	1945	68	7	1967	25
8	2011	67	8	1900	26
	1969	67	9	1906	27
10	1968	64	10	1916	28
	1874	64		1876	28

Top 10 Warmest (Lows)			Top 10 Coldest (Lows)
1	2012	58	1	1900	0
2	1894	49	2	1941	1
3	2011	48	3	1902	3
4	2022	47		1885	6
5	1927	44	5	1875	9
6	1945	43		1939	11
7	1946	42		1993	12
	1874	42	8	1906	12
9	2009	41	9	1967	13
	1999	41		1909	14

Top 10 Wettest			Top 10 Snowiest
1	1965	1.42	1	1984	4.1
2	1919	0.82	2	1965	3.7
3	1991	0.59		1904	3.7
4	1904	0.51	4	1973	2.7
5	1998	0.49	5	1956	1.4
6	1946	0.47	6	2004	0.8
7	1980	0.45	7	2005	0.6
8	2021	0.37		1960	0.6
	1930	0.37	9	1934	0.5
10	1973	0.35	10	4 Years	0.2

Percent of Years (Precip)			Percent of Years (Snow)
>0	53%		>0	33%
>=0.01	30%		>=0.1	13%
>=0.1	13%		>1	4%
>=0.5	3%		>3	2%

More High Temperature Stats
>=60°	11%
<=32°	16%

Rockford

Official weather records for Rockford date back to 1905 for temperatures, precipitation, and snowfall. Observation location history for Rockford can be found here.

St. Patrick's Day Climate Data for Rockford

Top 10 Warmest (Highs)			Top 10 Coldest (Highs)
1	2012	82	1	1941	12
2	2009	75	2	1906	18
3	2003	74	3	1939	22
4	1966	73	4	1993	24
5	1945	70		1909	24
6	2022	68	6	1959	25
7	2011	67	7	1967	28
	1921	67	8	1984	30
9	1930	66	9	1989	31
10	2010	64		1978	31
				1960	31
				1943	31

Top 10 Warmest (Lows)			Top 10 Coldest (Lows)
1	2012	57	1	1941	-3
2	2011	45	2	1939	8
	2003	45		1906	8
4	1945	44	4	1923	9
5	1966	41		1909	9
	1930	41	6	1959	10
7	2022	40	7	1993	11
	2009	40		1976	11
	1946	40		1913	11
10	1927	39	10	1967	12
				1926	12

Top 10 Wettest			Top 10 Snowiest
1	1919	0.62	1	1984	4.0
2	1934	0.45	2	1965	2.7
3	1991	0.42	3	2004	1.0
4	1963	0.35	4	2005	0.9
5	1984	0.31	5	2001	0.6
6	1998	0.29		1996	0.6
7	1927	0.24		1960	0.6
8	2021	0.19	8	1934	0.5
	1979	0.19	9	1989	0.4
10	2018	0.15		1964	0.4
	1989	0.15		1935	0.4

Percent of Years (Precip)			Percent of Years (Snow)
>0	41%		>0	25%
>=0.01	26%		>=0.1	13%
>=0.1	12%		>1	3%
>=0.5	1%		>3	1%

More High Temperature Stats
>=60°	15%
<=32°	12%

Links

History of St. Patrick's Day (Library of Congress)
Other Local Holiday Climatology
Local Climate Page