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 2002 Precipitation Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
July 2002 1-Month	2.60in (66.04mm)	3.64in (92.46mm)	-1.04in	27th Driest	Driest since: 1997	1930
July 2002 1-Month	2.60in (66.04mm)	3.64in (92.46mm)	-1.04in	104th Wettest	Wettest since: 2001	1958
Jun–Jul 2002 2-Month	6.62in (168.15mm)	7.72in (196.09mm)	-1.10in	36th Driest	Driest since: 1997	1936
Jun–Jul 2002 2-Month	6.62in (168.15mm)	7.72in (196.09mm)	-1.10in	95th Wettest	Wettest since: 2001	2015
May–Jul 2002 3-Month	13.96in (354.58mm)	11.80in (299.72mm)	2.16in	89th Driest	Driest since: 2001	1936
May–Jul 2002 3-Month	13.96in (354.58mm)	11.80in (299.72mm)	2.16in	42nd Wettest	Wettest since: 2000	2015
Apr–Jul 2002 4-Month	19.07in (484.38mm)	15.52in (394.21mm)	3.55in	103rd Driest	Driest since: 2001	1988
Apr–Jul 2002 4-Month	19.07in (484.38mm)	15.52in (394.21mm)	3.55in	28th Wettest	Wettest since: 2000	1957
Mar–Jul 2002 5-Month	22.43in (569.72mm)	18.61in (472.69mm)	3.82in	105th Driest	Driest since: 2001	1936
Mar–Jul 2002 5-Month	22.43in (569.72mm)	18.61in (472.69mm)	3.82in	26th Wettest	Wettest since: 1998	1973
Feb–Jul 2002 6-Month	24.26in (616.20mm)	20.47in (519.94mm)	3.79in	104th Driest	Driest since: 2001	1936
Feb–Jul 2002 6-Month	24.26in (616.20mm)	20.47in (519.94mm)	3.79in	27th Wettest	Wettest since: 1998	2008
Jan–Jul 2002 7-Month	26.48in (672.59mm)	22.60in (574.04mm)	3.88in	100th Driest	Driest since: 2001	1936
Jan–Jul 2002 7-Month	26.48in (672.59mm)	22.60in (574.04mm)	3.88in	31st Wettest	Wettest since: 1998	2008
Dec 2001–Jul 2002 8-Month	29.08in (738.63mm)	24.92in (632.97mm)	4.16in	101st Driest	Driest since: 2001	1936
Dec 2001–Jul 2002 8-Month	29.08in (738.63mm)	24.92in (632.97mm)	4.16in	29th Wettest	Wettest since: 1998	2008
Nov 2001–Jul 2002 9-Month	31.70in (805.18mm)	27.67in (702.82mm)	4.03in	98th Driest	Driest since: 2001	1934
Nov 2001–Jul 2002 9-Month	31.70in (805.18mm)	27.67in (702.82mm)	4.03in	32nd Wettest	Wettest since: 1998	1993
Oct 2001–Jul 2002 10-Month	37.78in (959.61mm)	30.46in (773.68mm)	7.32in	117th Driest	Driest since: 2001	1934
Oct 2001–Jul 2002 10-Month	37.78in (959.61mm)	30.46in (773.68mm)	7.32in	13th Wettest	Wettest since: 1993	2010
Sep 2001–Jul 2002 11-Month	41.15in (1,045.21mm)	33.96in (862.58mm)	7.19in	115th Driest	Driest since: 2001	1934
Sep 2001–Jul 2002 11-Month	41.15in (1,045.21mm)	33.96in (862.58mm)	7.19in	15th Wettest	Wettest since: 1993	1927
Aug 2001–Jul 2002 12-Month	45.22in (1,148.59mm)	37.46in (951.48mm)	7.76in	116th Driest	Driest since: 2001	1934
Aug 2001–Jul 2002 12-Month	45.22in (1,148.59mm)	37.46in (951.48mm)	7.76in	14th Wettest	Wettest since: 1993	1927
Feb 2001–Jul 2002 18-Month	64.41in (1,636.01mm)	57.89in	6.52in	104th Driest	Driest since: 2001	1931
Feb 2001–Jul 2002 18-Month	64.41in (1,636.01mm)	57.89in	6.52in	26th Wettest	Wettest since: 1999	2010
Aug 2000–Jul 2002 24-Month	80.72in (2,050.29mm)	74.90in	5.82in	94th Driest	Driest since: 2001	1954
Aug 2000–Jul 2002 24-Month	80.72in (2,050.29mm)	74.90in	5.82in	35th Wettest	Wettest since: 1999	2020
Aug 1999–Jul 2002 36-Month	115.84in (2,942.34mm)	112.32in	3.52in	75th Driest	Driest since: 2001	1965
Aug 1999–Jul 2002 36-Month	115.84in (2,942.34mm)	112.32in	3.52in	53rd Wettest	Wettest since: 2000	2010
Aug 1998–Jul 2002 48-Month	155.43in (3,947.92mm)	149.68in	5.75in	78th Driest	Driest since: 2001	1956
Aug 1998–Jul 2002 48-Month	155.43in (3,947.92mm)	149.68in	5.75in	49th Wettest	Wettest since: 1999	2011
Aug 1997–Jul 2002 60-Month	199.54in (5,068.32mm)	187.11in	12.43in	91st Driest	Driest since: 2001	1934
Aug 1997–Jul 2002 60-Month	199.54in (5,068.32mm)	187.11in	12.43in	35th Wettest	Wettest since: 1998	2011

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on April 2, 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 2002 Precipitation Rankings

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