Statewide Rankings

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

Iowa

Precipitation Rankings, January 1991

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Record Driest

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
January 1991 1-Month	0.77" (19.56mm)	0.98" (24.89mm)	-0.21" (-5.33mm)	51st Driest	Driest since: 1988	1981
	0.77" (19.56mm)	0.98" (24.89mm)	-0.21" (-5.33mm)	78th Wettest	Wettest since: 1990	1949
	Ties: 1943, 1959
Dec 1990–Jan 1991 2-Month	2.27" (57.66mm)	2.08" (52.83mm)	0.19" (4.83mm)	78th Driest	Driest since: 1990	2003
Dec 1990–Jan 1991 2-Month	2.27" (57.66mm)	2.08" (52.83mm)	0.19" (4.83mm)	50th Wettest	Wettest since: 1988	2016
Nov 1990–Jan 1991 3-Month	3.92" (99.57mm)	3.82" (97.03mm)	0.10" (2.54mm)	72nd Driest	Driest since: 1990	2003
Nov 1990–Jan 1991 3-Month	3.92" (99.57mm)	3.82" (97.03mm)	0.10" (2.54mm)	56th Wettest	Wettest since: 1989	1932
Oct 1990–Jan 1991 4-Month	5.80" (147.32mm)	6.13" (155.70mm)	-0.33" (-8.38mm)	57th Driest	Driest since: 1990	1911
Oct 1990–Jan 1991 4-Month	5.80" (147.32mm)	6.13" (155.70mm)	-0.33" (-8.38mm)	71st Wettest	Wettest since: 1988	1932
Sep 1990–Jan 1991 5-Month	7.19" (182.63mm)	9.83" (249.68mm)	-2.64" (-67.05mm)	28th Driest	Driest since: 1981	1977
Sep 1990–Jan 1991 5-Month	7.19" (182.63mm)	9.83" (249.68mm)	-2.64" (-67.05mm)	100th Wettest	Wettest since: 1990	1932
Aug 1990–Jan 1991 6-Month	11.51" (292.35mm)	13.69" (347.73mm)	-2.18" (-55.38mm)	34th Driest	Driest since: 1977	1977
Aug 1990–Jan 1991 6-Month	11.51" (292.35mm)	13.69" (347.73mm)	-2.18" (-55.38mm)	94th Wettest	Wettest since: 1990	2019
Jul 1990–Jan 1991 7-Month	17.88" (454.15mm)	17.57" (446.28mm)	0.31" (7.87mm)	72nd Driest	Driest since: 1990	1977
Jul 1990–Jan 1991 7-Month	17.88" (454.15mm)	17.57" (446.28mm)	0.31" (7.87mm)	56th Wettest	Wettest since: 1988	2019
Jun 1990–Jan 1991 8-Month	25.84" (656.34mm)	22.18" (563.37mm)	3.66" (92.97mm)	99th Driest	Driest since: 1990	1977
Jun 1990–Jan 1991 8-Month	25.84" (656.34mm)	22.18" (563.37mm)	3.66" (92.97mm)	29th Wettest	Wettest since: 1987	2019
May 1990–Jan 1991 9-Month	31.57" (801.88mm)	26.22" (665.99mm)	5.35" (135.89mm)	107th Driest	Driest since: 1990	1977
May 1990–Jan 1991 9-Month	31.57" (801.88mm)	26.22" (665.99mm)	5.35" (135.89mm)	21st Wettest	Wettest since: 1987	1994
Apr 1990–Jan 1991 10-Month	33.83" (859.28mm)	29.17" (740.92mm)	4.66" (118.36mm)	101st Driest	Driest since: 1990	1911
Apr 1990–Jan 1991 10-Month	33.83" (859.28mm)	29.17" (740.92mm)	4.66" (118.36mm)	27th Wettest	Wettest since: 1987	1994
Mar 1990–Jan 1991 11-Month	38.13" (968.50mm)	31.14" (790.96mm)	6.99" (177.54mm)	111th Driest	Driest since: 1990	1911
Mar 1990–Jan 1991 11-Month	38.13" (968.50mm)	31.14" (790.96mm)	6.99" (177.54mm)	17th Wettest	Wettest since: 1987	1994
Feb 1990–Jan 1991 12-Month	38.80" (985.52mm)	32.15" (816.61mm)	6.65" (168.91mm)	108th Driest	Driest since: 1990	1911
Feb 1990–Jan 1991 12-Month	38.80" (985.52mm)	32.15" (816.61mm)	6.65" (168.91mm)	20th Wettest	Wettest since: 1987	1994
Aug 1989–Jan 1991 18-Month	50.65" (1,286.51mm)	45.86" (1,164.84mm)	4.79" (121.67mm)	101st Driest	Driest since: 1990	1957
Aug 1989–Jan 1991 18-Month	50.65" (1,286.51mm)	45.86" (1,164.84mm)	4.79" (121.67mm)	26th Wettest	Wettest since: 1987	2020
Feb 1989–Jan 1991 24-Month	63.45" (1,611.63mm)	64.28" (1,632.71mm)	-0.83" (-21.08mm)	56th Driest	Driest since: 1990	1990
Feb 1989–Jan 1991 24-Month	63.45" (1,611.63mm)	64.28" (1,632.71mm)	-0.83" (-21.08mm)	71st Wettest	Wettest since: 1988	2020
Feb 1988–Jan 1991 36-Month	85.09" (2,161.29mm)	96.29" (2,445.77mm)	-11.20" (-284.48mm)	11th Driest	Driest since: 1990	1958
Feb 1988–Jan 1991 36-Month	85.09" (2,161.29mm)	96.29" (2,445.77mm)	-11.20" (-284.48mm)	115th Wettest	Wettest since: 1989	2011
Feb 1987–Jan 1991 48-Month	118.38" (3,006.85mm)	128.27" (3,258.06mm)	-9.89" (-251.21mm)	15th Driest	Driest since: 1959	1959
Feb 1987–Jan 1991 48-Month	118.38" (3,006.85mm)	128.27" (3,258.06mm)	-9.89" (-251.21mm)	110th Wettest	Wettest since: 1990	2011
Feb 1986–Jan 1991 60-Month	158.38" (4,022.85mm)	160.30" (4,071.62mm)	-1.92" (-48.77mm)	50th Driest	Driest since: 1990	1957
Feb 1986–Jan 1991 60-Month	158.38" (4,022.85mm)	160.30" (4,071.62mm)	-1.92" (-48.77mm)	74th Wettest	Wettest since: 1989	2011

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published November 2022, retrieved on November 30, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings