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, September 1897

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
September 1897 1-Month	1.97" (50.04mm)	3.67" (93.22mm)	-1.70" (-43.18mm)	23rd Driest	Driest since: 1897	1939
September 1897 1-Month	1.97" (50.04mm)	3.67" (93.22mm)	-1.70" (-43.18mm)	106th Wettest	Wettest since: 1896	1965
Aug–Sep 1897 2-Month	4.02" (102.11mm)	7.51" (190.75mm)	-3.49" (-88.64mm)	8th Driest	Driest since: 1897	1976
Aug–Sep 1897 2-Month	4.02" (102.11mm)	7.51" (190.75mm)	-3.49" (-88.64mm)	121st Wettest	Wettest since: 1896	2018
Jul–Sep 1897 3-Month	7.19" (182.63mm)	11.36" (288.54mm)	-4.17" (-105.91mm)	9th Driest	Driest since: 1897	2013
Jul–Sep 1897 3-Month	7.19" (182.63mm)	11.36" (288.54mm)	-4.17" (-105.91mm)	120th Wettest	Wettest since: 1896	1993
Jun–Sep 1897 4-Month	11.09" (281.69mm)	16.00" (406.40mm)	-4.91" (-124.71mm)	4th Driest	Driest since: 1897	2012
Jun–Sep 1897 4-Month	11.09" (281.69mm)	16.00" (406.40mm)	-4.91" (-124.71mm)	125th Wettest	Wettest since: 1896	1993
May–Sep 1897 5-Month	12.98" (329.69mm)	20.04" (509.02mm)	-7.06" (-179.33mm)	3rd Driest	Driest since: 1897	1976
May–Sep 1897 5-Month	12.98" (329.69mm)	20.04" (509.02mm)	-7.06" (-179.33mm)	126th Wettest	Wettest since: 1896	1993
Apr–Sep 1897 6-Month	17.94" (455.68mm)	22.99" (583.95mm)	-5.05" (-128.27mm)	14th Driest	Driest since: 1897	1988
Apr–Sep 1897 6-Month	17.94" (455.68mm)	22.99" (583.95mm)	-5.05" (-128.27mm)	115th Wettest	Wettest since: 1896	1993
Mar–Sep 1897 7-Month	20.23" (513.84mm)	24.94" (633.48mm)	-4.71" (-119.64mm)	14th Driest	Driest since: 1897	1988
Mar–Sep 1897 7-Month	20.23" (513.84mm)	24.94" (633.48mm)	-4.71" (-119.64mm)	115th Wettest	Wettest since: 1896	1993
Feb–Sep 1897 8-Month	21.11" (536.19mm)	25.96" (659.38mm)	-4.85" (-123.19mm)	13th Driest	Driest since: 1897	1988
Feb–Sep 1897 8-Month	21.11" (536.19mm)	25.96" (659.38mm)	-4.85" (-123.19mm)	116th Wettest	Wettest since: 1896	1993
Jan–Sep 1897 9-Month	22.96" (583.18mm)	26.93" (684.02mm)	-3.97" (-100.84mm)	22nd Driest	Driest since: 1895	1988
Jan–Sep 1897 9-Month	22.96" (583.18mm)	26.93" (684.02mm)	-3.97" (-100.84mm)	107th Wettest	Wettest since: 1896	1993
Dec 1896–Sep 1897 10-Month	23.60" (599.44mm)	28.04" (712.22mm)	-4.44" (-112.78mm)	17th Driest	Driest since: 1897	1988
Dec 1896–Sep 1897 10-Month	23.60" (599.44mm)	28.04" (712.22mm)	-4.44" (-112.78mm)	111th Wettest	Wettest since: 1896	1993
Nov 1896–Sep 1897 11-Month	25.61" (650.49mm)	29.78" (756.41mm)	-4.17" (-105.92mm)	22nd Driest	Driest since: 1897	1934
Nov 1896–Sep 1897 11-Month	25.61" (650.49mm)	29.78" (756.41mm)	-4.17" (-105.92mm)	106th Wettest	Wettest since: 1896	1993
Oct 1896–Sep 1897 12-Month	28.82" (732.03mm)	32.09" (815.09mm)	-3.27" (-83.06mm)	33rd Driest	Driest since: 1897	1934
Oct 1896–Sep 1897 12-Month	28.82" (732.03mm)	32.09" (815.09mm)	-3.27" (-83.06mm)	95th Wettest	Wettest since: 1896	1993
Apr 1896–Sep 1897 18-Month	57.57" (1,462.28mm)	55.13" (1,400.30mm)	2.44" (61.98mm)	81st Driest	Driest since: 1896	1934
Apr 1896–Sep 1897 18-Month	57.57" (1,462.28mm)	55.13" (1,400.30mm)	2.44" (61.98mm)	47th Wettest	Wettest to Date	1993
Oct 1895–Sep 1897 24-Month	63.15" (1,604.01mm)	64.26" (1,632.20mm)	-1.11" (-28.19mm)	55th Driest	Driest since: 1897	1956
Oct 1895–Sep 1897 24-Month	63.15" (1,604.01mm)	64.26" (1,632.20mm)	-1.11" (-28.19mm)	72nd Wettest	Wettest to Date	1993

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published November 2022, retrieved on December 1, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings