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

Divisional 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, Climate Division 3

December 2003 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2003 1-Month	2.87	-0.21	3.08	125th Driest	Driest since: 2002	1963
December 2003 1-Month	2.87	-0.21	3.08	6th Wettest	Wettest since: 1982	1982
Nov–Dec 2003 2-Month	2.35	-0.11	2.46	124th Driest	Driest since: 2002	1953
Nov–Dec 2003 2-Month	2.35	-0.11	2.46	7th Wettest	Wettest since: 1992	1985
Oct–Dec 2003 3-Month	1.43	-0.12	1.55	111th Driest	Driest since: 2002	1953
Oct–Dec 2003 3-Month	1.43	-0.12	1.55	20th Wettest	Wettest since: 1992	1985
Sep–Dec 2003 4-Month	1.60	-0.04	1.64	115th Driest	Driest since: 2002	1953
Sep–Dec 2003 4-Month	1.60	-0.04	1.64	16th Wettest	Wettest since: 1992	1941
Aug–Dec 2003 5-Month	1.18	-0.05	1.23	108th Driest	Driest since: 2002	1901, 1953
Aug–Dec 2003 5-Month	1.18	-0.05	1.23	23rd Wettest	Wettest since: 1993	1970
Jul–Dec 2003 6-Month	1.29	-0.04	1.33	106th Driest	Driest since: 2002	1901, 1953
Jul–Dec 2003 6-Month	1.29	-0.04	1.33	25th Wettest	Wettest since: 1993	1961
Jun–Dec 2003 7-Month	1.13	-0.02	1.15	104th Driest	Driest since: 2002	1953
Jun–Dec 2003 7-Month	1.13	-0.02	1.15	27th Wettest	Wettest since: 1993	1993
May–Dec 2003 8-Month	0.99	-0.01	1.00	103rd Driest	Driest since: 2002	1901
	0.99	-0.01	1.00	28th Wettest	Wettest since: 1993	1993
	Ties: 1980
Apr–Dec 2003 9-Month	0.87	-0.01	0.88	105th Driest	Driest since: 2002	1901
Apr–Dec 2003 9-Month	0.87	-0.01	0.88	26th Wettest	Wettest since: 1993	2009
Mar–Dec 2003 10-Month	0.64	-0.03	0.67	95th Driest	Driest since: 2002	1914
	0.64	-0.03	0.67	36th Wettest	Wettest since: 1998	2009
	Ties: 1980
Feb–Dec 2003 11-Month	0.50	-0.02	0.52	89th Driest	Driest since: 2002	1914
	0.50	-0.02	0.52	42nd Wettest	Wettest since: 2001	2009
	Ties: 1992
Jan–Dec 2003 12-Month	0.33	-0.02	0.35	82nd Driest	Driest since: 2002	1914
Jan–Dec 2003 12-Month	0.33	-0.02	0.35	49th Wettest	Wettest since: 2001	2009
Jul 2002–Dec 2003 18-Month	0.02	-0.03	0.05	60th Driest	Driest since: 2000	1914
	0.02	-0.03	0.05	70th Wettest	Wettest since: 2002	1993
	Ties: 1987
Jan 2002–Dec 2003 24-Month	0.29	-0.02	0.31	79th Driest	Driest since: 2001	1914
Jan 2002–Dec 2003 24-Month	0.29	-0.02	0.31	51st Wettest	Wettest since: 2002	2009, 2010
Jan 2001–Dec 2003 36-Month	0.43	-0.02	0.45	98th Driest	Driest since: 2002	1989
Jan 2001–Dec 2003 36-Month	0.43	-0.02	0.45	31st Wettest	Wettest since: 1995	2010
Jan 2000–Dec 2003 48-Month	0.25	-0.02	0.27	80th Driest	Driest since: 2002	1914
Jan 2000–Dec 2003 48-Month	0.25	-0.02	0.27	48th Wettest	Wettest since: 2001	2011
Jan 1999–Dec 2003 60-Month	0.13	-0.02	0.15	69th Driest	Driest since: 2000	1914
Jan 1999–Dec 2003 60-Month	0.13	-0.02	0.15	58th Wettest	Wettest since: 2002	1985

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Illinois, Climate Division 3

December 2003 Palmer Z-Index Rankings

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