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 1978

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Record Driest

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2023)	Wettest/Driest Since	Record
January 1978 1-Month	0.59" (14.99mm)	0.98" (24.89mm)	-0.39" (-9.90mm)	33rd Driest	Driest since: 1977	1981
	0.59" (14.99mm)	0.98" (24.89mm)	-0.39" (-9.90mm)	97th Wettest	Wettest since: 1975	1949
	Ties: 2016
Dec 1977–Jan 1978 2-Month	1.65" (41.91mm)	2.08" (52.83mm)	-0.43" (-10.92mm)	41st Driest	Driest since: 1977	2003
	1.65" (41.91mm)	2.08" (52.83mm)	-0.43" (-10.92mm)	88th Wettest	Wettest since: 1975	2016
	Ties: 2022
Nov 1977–Jan 1978 3-Month	3.30" (83.82mm)	3.82" (97.03mm)	-0.52" (-13.21mm)	50th Driest	Driest since: 1977	2003
	3.30" (83.82mm)	3.82" (97.03mm)	-0.52" (-13.21mm)	79th Wettest	Wettest since: 1976	1932
	Ties: 2008
Oct 1977–Jan 1978 4-Month	7.42" (188.47mm)	6.13" (155.70mm)	1.29" (32.77mm)	94th Driest	Driest since: 1977	1911
Oct 1977–Jan 1978 4-Month	7.42" (188.47mm)	6.13" (155.70mm)	1.29" (32.77mm)	35th Wettest	Wettest since: 1974	1932
Sep 1977–Jan 1978 5-Month	12.11" (307.59mm)	9.83" (249.68mm)	2.28" (57.91mm)	99th Driest	Driest since: 1977	1977
	12.11" (307.59mm)	9.83" (249.68mm)	2.28" (57.91mm)	30th Wettest	Wettest since: 1974	1932
	Ties: 1947
Aug 1977–Jan 1978 6-Month	20.31" (515.87mm)	13.69" (347.73mm)	6.62" (168.14mm)	124th Driest	Driest since: 1977	1977
Aug 1977–Jan 1978 6-Month	20.31" (515.87mm)	13.69" (347.73mm)	6.62" (168.14mm)	5th Wettest	Wettest since: 1932	2019
Jul 1977–Jan 1978 7-Month	24.30" (617.22mm)	17.57" (446.28mm)	6.73" (170.94mm)	118th Driest	Driest since: 1977	1977
Jul 1977–Jan 1978 7-Month	24.30" (617.22mm)	17.57" (446.28mm)	6.73" (170.94mm)	11th Wettest	Wettest since: 1973	2019
Jun 1977–Jan 1978 8-Month	26.97" (685.04mm)	22.18" (563.37mm)	4.79" (121.67mm)	109th Driest	Driest since: 1977	1977
Jun 1977–Jan 1978 8-Month	26.97" (685.04mm)	22.18" (563.37mm)	4.79" (121.67mm)	20th Wettest	Wettest since: 1973	2019
May 1977–Jan 1978 9-Month	29.74" (755.40mm)	26.22" (665.99mm)	3.52" (89.41mm)	99th Driest	Driest since: 1977	1977
May 1977–Jan 1978 9-Month	29.74" (755.40mm)	26.22" (665.99mm)	3.52" (89.41mm)	30th Wettest	Wettest since: 1974	1994
Apr 1977–Jan 1978 10-Month	32.27" (819.66mm)	29.17" (740.92mm)	3.10" (78.74mm)	91st Driest	Driest since: 1977	1911
Apr 1977–Jan 1978 10-Month	32.27" (819.66mm)	29.17" (740.92mm)	3.10" (78.74mm)	38th Wettest	Wettest since: 1974	1994
Mar 1977–Jan 1978 11-Month	36.17" (918.72mm)	31.14" (790.96mm)	5.03" (127.76mm)	104th Driest	Driest since: 1977	1911
Mar 1977–Jan 1978 11-Month	36.17" (918.72mm)	31.14" (790.96mm)	5.03" (127.76mm)	25th Wettest	Wettest since: 1974	1994
Feb 1977–Jan 1978 12-Month	36.68" (931.67mm)	32.15" (816.61mm)	4.53" (115.06mm)	100th Driest	Driest since: 1977	1911
Feb 1977–Jan 1978 12-Month	36.68" (931.67mm)	32.15" (816.61mm)	4.53" (115.06mm)	29th Wettest	Wettest since: 1974	1994
Aug 1976–Jan 1978 18-Month	42.07" (1,068.58mm)	45.86" (1,164.84mm)	-3.79" (-96.26mm)	37th Driest	Driest since: 1977	1957
Aug 1976–Jan 1978 18-Month	42.07" (1,068.58mm)	45.86" (1,164.84mm)	-3.79" (-96.26mm)	91st Wettest	Wettest since: 1976	2020
Feb 1976–Jan 1978 24-Month	60.55" (1,537.97mm)	64.28" (1,632.71mm)	-3.73" (-94.74mm)	41st Driest	Driest since: 1977	1990
Feb 1976–Jan 1978 24-Month	60.55" (1,537.97mm)	64.28" (1,632.71mm)	-3.73" (-94.74mm)	87th Wettest	Wettest since: 1976	2020
Feb 1975–Jan 1978 36-Month	89.32" (2,268.73mm)	96.29" (2,445.77mm)	-6.97" (-177.04mm)	23rd Driest	Driest since: 1977	1958
Feb 1975–Jan 1978 36-Month	89.32" (2,268.73mm)	96.29" (2,445.77mm)	-6.97" (-177.04mm)	104th Wettest	Wettest since: 1976	2011
Feb 1974–Jan 1978 48-Month	121.62" (3,089.15mm)	128.27" (3,258.06mm)	-6.65" (-168.91mm)	27th Driest	Driest since: 1960	1959
	121.62" (3,089.15mm)	128.27" (3,258.06mm)	-6.65" (-168.91mm)	99th Wettest	Wettest since: 1977	2011
	Ties: 1939
Feb 1973–Jan 1978 60-Month	164.02" (4,166.11mm)	160.30" (4,071.62mm)	3.72" (94.49mm)	72nd Driest	Driest since: 1972	1957
Feb 1973–Jan 1978 60-Month	164.02" (4,166.11mm)	160.30" (4,071.62mm)	3.72" (94.49mm)	53rd Wettest	Wettest since: 1977	2011

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 24, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings