Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Chicago Precipitation Rankings for each month

CHICAGO
MONTHLY TOTAL PRECIPITATION
MAY

Normal: 4.49 inches

***Smallest to Greatest Official Chicago Precipitation Data from 1871 - 2022***

0.30	1992	2.73	1926	4.38	2012
0.58	1994	2.79	1985	4.39	2002
0.67	1934	2.83	1960	4.40	1927
0.78	1950	2.88	1972	4.46	1999
0.80	1921	2.89	1932	4.47	1995
0.84	1897	2.90	1962	4.49	1984
0.93	1903	2.93	1916	4.50	1942
1.00	1886	3.02	1998	4.57	1918
1.19	1988	3.06	1956	4.66	2015
1.38	1887	3.09	1978	4.67	1910
1.39	1967	3.11	1986	4.80	1948
1.39	1977	3.12	1958	4.90	1951
1.47	1965	3.17	1885	4.90	2010
1.53	1884	3.18	1922	4.96	2013
1.53	1961	3.18	1952	4.97	1880
1.54	1904	3.21	1957	4.98	2014
1.59	1925	3.22	1980	5.03	1933
1.59	1928	3.24	1872	5.08	1902
1.59	1989	3.28	2017	5.08	1931
1.64	1937	3.34	2001	5.13	1890
1.74	1964	3.35	1894	5.14	1905
1.75	1954	3.37	1911	5.16	1940
1.79	2021	3.41	1917	5.20	1991
1.80	2007	3.42	1941	5.22	1878
1.81	1877	3.46	1923	5.22	1914
1.81	1920	3.47	2022	5.29	2003
1.83	1993	3.50	1907	5.31	1975
1.85	1876	3.54	1946	5.38	1889
1.85	1881	3.59	1900	5.43	2016
1.93	1893	3.63	2009	5.52	1882
1.98	1971	3.64	1875	5.78	1966
1.99	1895	3.65	2006	5.85	1981
1.99	2005	3.66	1939	5.98	1974
2.00	1979	3.84	1919	6.22	1888
2.06	1968	3.86	1955	6.26	1983
2.08	1874	3.87	1959	6.74	1908
2.08	1936	3.89	1879	6.77	1892
2.08	1982	3.90	1871	6.85	1990
2.09	1891	3.97	1912	6.95	1996
2.09	1906	3.97	1947	7.04	1915
2.16	1930	3.98	1938	7.08	1943
2.17	1963	4.00	1976	7.09	1935
2.18	1901	4.02	2000	7.20	1873
2.18	1909	4.04	1969	7.22	2004
2.21	1987	4.10	2008	7.27	2011
2.23	1898	4.16	1896	7.32	1883
2.29	1929	4.17	1973	7.59	1945
2.30	1924	4.18	1970	8.21	2018
2.43	1953	4.35	1899	8.25	2019
2.46	1949	4.36	1944	9.51	2020
2.69	1997	4.38	1913

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Thunderstorms and Heavy Rains in the Appalachians

May Precipitation Rankings for Chicago