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 2010 Precipitation Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
July 2010 1-Month	5.35in (135.89mm)	3.64in (92.46mm)	1.71in	112th Driest	Driest since: 2009	1930
July 2010 1-Month	5.35in (135.89mm)	3.64in (92.46mm)	1.71in	19th Wettest	Wettest since: 2008	1958
Jun–Jul 2010 2-Month	13.06in (331.72mm)	7.72in (196.09mm)	5.34in	126th Driest	Driest since: 2009	1936
Jun–Jul 2010 2-Month	13.06in (331.72mm)	7.72in (196.09mm)	5.34in	5th Wettest	Wettest since: 1993	2015
May–Jul 2010 3-Month	18.46in (468.88mm)	11.80in (299.72mm)	6.66in	129th Driest	Driest since: 2009	1936
	18.46in (468.88mm)	11.80in (299.72mm)	6.66in	2nd Wettest	Wettest since: 1990	2015
	Ties: 1990
Apr–Jul 2010 4-Month	21.82in (554.23mm)	15.52in (394.21mm)	6.30in	124th Driest	Driest since: 2009	1988
Apr–Jul 2010 4-Month	21.82in (554.23mm)	15.52in (394.21mm)	6.30in	7th Wettest	Wettest since: 1993	1957
Mar–Jul 2010 5-Month	24.56in (623.82mm)	18.61in (472.69mm)	5.95in	117th Driest	Driest since: 2007	1936
Mar–Jul 2010 5-Month	24.56in (623.82mm)	18.61in (472.69mm)	5.95in	14th Wettest	Wettest since: 2009	1973
Feb–Jul 2010 6-Month	26.09in (662.69mm)	20.47in (519.94mm)	5.62in	115th Driest	Driest since: 2007	1936
Feb–Jul 2010 6-Month	26.09in (662.69mm)	20.47in (519.94mm)	5.62in	16th Wettest	Wettest since: 2009	2008
Jan–Jul 2010 7-Month	27.53in (699.26mm)	22.60in (574.04mm)	4.93in	109th Driest	Driest since: 2007	1936
Jan–Jul 2010 7-Month	27.53in (699.26mm)	22.60in (574.04mm)	4.93in	22nd Wettest	Wettest since: 2009	2008
Dec 2009–Jul 2010 8-Month	31.51in (800.35mm)	24.92in (632.97mm)	6.59in	117th Driest	Driest since: 2007	1936
Dec 2009–Jul 2010 8-Month	31.51in (800.35mm)	24.92in (632.97mm)	6.59in	13th Wettest	Wettest since: 2009	2008
Nov 2009–Jul 2010 9-Month	33.99in (863.35mm)	27.67in (702.82mm)	6.32in	113th Driest	Driest since: 2007	1934
Nov 2009–Jul 2010 9-Month	33.99in (863.35mm)	27.67in (702.82mm)	6.32in	17th Wettest	Wettest since: 2009	1993
Oct 2009–Jul 2010 10-Month	42.48in (1,078.99mm)	30.46in (773.68mm)	12.02in	129th Driest	Driest since: 2009	1934
Oct 2009–Jul 2010 10-Month	42.48in (1,078.99mm)	30.46in (773.68mm)	12.02in	1st Wettest	Wettest to Date	2010
Sep 2009–Jul 2010 11-Month	44.76in (1,136.90mm)	33.96in (862.58mm)	10.80in	124th Driest	Driest since: 2008	1934
Sep 2009–Jul 2010 11-Month	44.76in (1,136.90mm)	33.96in (862.58mm)	10.80in	6th Wettest	Wettest since: 2009	1927
Aug 2009–Jul 2010 12-Month	49.48in (1,256.79mm)	37.46in (951.48mm)	12.02in	126th Driest	Driest since: 2009	1934
Aug 2009–Jul 2010 12-Month	49.48in (1,256.79mm)	37.46in (951.48mm)	12.02in	4th Wettest	Wettest since: 1973	1927
Feb 2009–Jul 2010 18-Month	77.48in (1,967.99mm)	57.89in	19.59in	129th Driest	Driest since: 2009	1931
Feb 2009–Jul 2010 18-Month	77.48in (1,967.99mm)	57.89in	19.59in	1st Wettest	Wettest to Date	2010
Aug 2008–Jul 2010 24-Month	96.20in (2,443.48mm)	74.90in	21.30in	127th Driest	Driest since: 2009	1954
Aug 2008–Jul 2010 24-Month	96.20in (2,443.48mm)	74.90in	21.30in	2nd Wettest	Wettest to Date	2020
Aug 2007–Jul 2010 36-Month	143.70in (3,649.98mm)	112.32in	31.38in	127th Driest	Driest since: 2009	1965
Aug 2007–Jul 2010 36-Month	143.70in (3,649.98mm)	112.32in	31.38in	1st Wettest	Wettest to Date	2010
Aug 2006–Jul 2010 48-Month	183.33in (4,656.58mm)	149.68in	33.65in	125th Driest	Driest since: 2009	1956
Aug 2006–Jul 2010 48-Month	183.33in (4,656.58mm)	149.68in	33.65in	2nd Wettest	Wettest to Date	2011
Aug 2005–Jul 2010 60-Month	219.21in (5,567.93mm)	187.11in	32.10in	122nd Driest	Driest since: 2009	1934
Aug 2005–Jul 2010 60-Month	219.21in (5,567.93mm)	187.11in	32.10in	4th Wettest	Wettest to Date	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 2010 Precipitation Rankings

Citing This Page

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