Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >
Updated March 2023.
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% | |||||
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