Climate at a Glance | Statewide Rankings | National Centers for Environmental Information (NCEI)

Statewide Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska or Hawaii. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Illinois

July 1930 Precipitation Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
July 1930 1-Month	0.97in (24.64mm)	3.64in (92.46mm)	-2.67in	1st Driest	Driest to Date	1930
July 1930 1-Month	0.97in (24.64mm)	3.64in (92.46mm)	-2.67in	130th Wettest	Wettest since: 1929	1958
Jun–Jul 1930 2-Month	4.38in (111.25mm)	7.72in (196.09mm)	-3.34in	8th Driest	Driest since: 1914	1936
Jun–Jul 1930 2-Month	4.38in (111.25mm)	7.72in (196.09mm)	-3.34in	123rd Wettest	Wettest since: 1929	2015
May–Jul 1930 3-Month	6.22in (157.99mm)	11.80in (299.72mm)	-5.58in	4th Driest	Driest to Date	1936
May–Jul 1930 3-Month	6.22in (157.99mm)	11.80in (299.72mm)	-5.58in	127th Wettest	Wettest since: 1929	2015
Apr–Jul 1930 4-Month	8.96in (227.58mm)	15.52in (394.21mm)	-6.56in	6th Driest	Driest since: 1914	1988
Apr–Jul 1930 4-Month	8.96in (227.58mm)	15.52in (394.21mm)	-6.56in	125th Wettest	Wettest since: 1929	1957
Mar–Jul 1930 5-Month	10.49in (266.45mm)	18.61in (472.69mm)	-8.12in	3rd Driest	Driest to Date	1936
Mar–Jul 1930 5-Month	10.49in (266.45mm)	18.61in (472.69mm)	-8.12in	128th Wettest	Wettest since: 1929	1973
Feb–Jul 1930 6-Month	12.42in (315.47mm)	20.47in (519.94mm)	-8.05in	5th Driest	Driest to Date	1936
Feb–Jul 1930 6-Month	12.42in (315.47mm)	20.47in (519.94mm)	-8.05in	126th Wettest	Wettest since: 1929	2008
Jan–Jul 1930 7-Month	16.92in (429.77mm)	22.60in (574.04mm)	-5.68in	10th Driest	Driest since: 1925	1936
Jan–Jul 1930 7-Month	16.92in (429.77mm)	22.60in (574.04mm)	-5.68in	121st Wettest	Wettest since: 1929	2008
Dec 1929–Jul 1930 8-Month	19.16in (486.66mm)	24.92in (632.97mm)	-5.76in	10th Driest	Driest since: 1914	1936
Dec 1929–Jul 1930 8-Month	19.16in (486.66mm)	24.92in (632.97mm)	-5.76in	120th Wettest	Wettest since: 1929	2008
Nov 1929–Jul 1930 9-Month	20.92in (531.37mm)	27.67in (702.82mm)	-6.75in	9th Driest	Driest since: 1914	1934
Nov 1929–Jul 1930 9-Month	20.92in (531.37mm)	27.67in (702.82mm)	-6.75in	121st Wettest	Wettest since: 1929	1993
Oct 1929–Jul 1930 10-Month	24.43in (620.52mm)	30.46in (773.68mm)	-6.03in	10th Driest	Driest since: 1925	1934
Oct 1929–Jul 1930 10-Month	24.43in (620.52mm)	30.46in (773.68mm)	-6.03in	120th Wettest	Wettest since: 1929	2010
Sep 1929–Jul 1930 11-Month	27.14in (689.36mm)	33.96in (862.58mm)	-6.82in	12th Driest	Driest since: 1925	1934
Sep 1929–Jul 1930 11-Month	27.14in (689.36mm)	33.96in (862.58mm)	-6.82in	118th Wettest	Wettest since: 1929	1927
Aug 1929–Jul 1930 12-Month	29.62in (752.35mm)	37.46in (951.48mm)	-7.84in	9th Driest	Driest since: 1914	1934
Aug 1929–Jul 1930 12-Month	29.62in (752.35mm)	37.46in (951.48mm)	-7.84in	121st Wettest	Wettest since: 1929	1927
Feb 1929–Jul 1930 18-Month	54.74in (1,390.40mm)	57.89in	-3.15in	35th Driest	Driest since: 1926	1931
Feb 1929–Jul 1930 18-Month	54.74in (1,390.40mm)	57.89in	-3.15in	95th Wettest	Wettest since: 1929	2010
Aug 1928–Jul 1930 24-Month	74.30in (1,887.22mm)	74.90in	-0.60in	54th Driest	Driest since: 1926	1954
Aug 1928–Jul 1930 24-Month	74.30in (1,887.22mm)	74.90in	-0.60in	75th Wettest	Wettest since: 1929	2020
Aug 1927–Jul 1930 36-Month	115.49in (2,933.45mm)	112.32in	3.17in	73rd Driest	Driest since: 1926	1965
Aug 1927–Jul 1930 36-Month	115.49in (2,933.45mm)	112.32in	3.17in	55th Wettest	Wettest since: 1929	2010
Aug 1926–Jul 1930 48-Month	167.93in (4,265.42mm)	149.68in	18.25in	110th Driest	Driest since: 1928	1956
Aug 1926–Jul 1930 48-Month	167.93in (4,265.42mm)	149.68in	18.25in	17th Wettest	Wettest since: 1929	2011
Aug 1925–Jul 1930 60-Month	203.34in (5,164.84mm)	187.11in	16.23in	103rd Driest	Driest since: 1928	1934
Aug 1925–Jul 1930 60-Month	203.34in (5,164.84mm)	187.11in	16.23in	23rd Wettest	Wettest since: 1929	2011

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on March 30, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings

Climate at a Glance Statewide Rankings

Statewide Rankings

Illinois

July 1930 Precipitation Rankings

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