Statewide Rankings

Statewide Data Info
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, December 1958

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2021)		 Wettest/Driest
Since		 Record
December 1958
1-Month 		0.25"
(6.35mm)		 1.11"
(28.19mm)		 -0.86"
(-21.84mm)		 2nd Driest
Driest since:
 2002
126th Wettest
Wettest since:
 2015
Nov–Dec 1958
2-Month 		1.87"
(47.50mm)		 2.87"
(72.90mm)		 -1.00"
(-25.40mm)		 35th Driest
Driest since:
 1976
93rd Wettest
Wettest since:
 2015
Oct–Dec 1958
3-Month 		2.79"
(70.87mm)		 5.16"
(131.06mm)		 -2.37"
(-60.19mm)		 12th Driest
Driest since:
 1910
116th Wettest
Wettest since:
 1931
Sep–Dec 1958
4-Month 		5.86"
(148.84mm)		 8.83"
(224.28mm)		 -2.97"
(-75.44mm)		 18th Driest
Driest since:
 1939, 1976
110th Wettest
Wettest since:
 1931
Aug–Dec 1958
5-Month 		8.33"
(211.58mm)		 12.67"
(321.82mm)		 -4.34"
(-110.24mm)		 10th Driest
Driest since:
 1976
118th Wettest
Wettest since:
 2018
Jul–Dec 1958
6-Month 		15.50"
(393.70mm)		 16.52"
(419.61mm)		 -1.02"
(-25.91mm)		 53rd Driest
Driest since:
 1976
75th Wettest
Wettest since:
 2018
Jun–Dec 1958
7-Month 		19.36"
(491.74mm)		 21.15"
(537.21mm)		 -1.79"
(-45.47mm)		 47th Driest
Driest since:
 1976
81st Wettest
Wettest since:
 2018
May–Dec 1958
8-Month 		21.36"
(542.54mm)		 25.20"
(640.08mm)		 -3.84"
(-97.54mm)		 24th Driest
Driest since:
 1976
104th Wettest
Wettest since:
 1993
Apr–Dec 1958
9-Month 		23.59"
(599.19mm)		 28.15"
(715.01mm)		 -4.56"
(-115.82mm)		 19th Driest
Driest since:
 1910
109th Wettest
Wettest since:
 1993
Mar–Dec 1958
10-Month 		24.15"
(613.41mm)		 30.10"
(764.54mm)		 -5.95"
(-151.13mm)		 16th Driest
Driest since:
 1910
112th Wettest
Wettest since:
 1993
Feb–Dec 1958
11-Month 		24.63"
(625.60mm)		 31.12"
(790.45mm)		 -6.49"
(-164.85mm)		 13th Driest
Driest since:
 1910
115th Wettest
Wettest since:
 1993
Jan–Dec 1958
12-Month 		25.33"
(643.38mm)		 32.09"
(815.09mm)		 -6.76"
(-171.71mm)		 11th Driest
Driest since:
 1910
117th Wettest
Wettest since:
 1993
Jul 1957–Dec 1958
18-Month 		41.84"
(1,062.74mm)		 48.69"
(1,236.73mm)		 -6.85"
(-173.99mm)		 18th Driest
Driest since:
 1956
109th Wettest
Wettest since:
 1993
Jan 1957–Dec 1958
24-Month 		56.85"
(1,443.99mm)		 64.24"
(1,631.70mm)		 -7.39"
(-187.71mm)		 17th Driest
Driest since:
 1989
110th Wettest
Wettest since:
 2019
Jan 1956–Dec 1958
36-Month 		81.13"
(2,060.70mm)		 96.36"
(2,447.54mm)		 -15.23"
(-386.84mm)		 4th Driest
Driest since:
 1957
122nd Wettest
Wettest since:
 2010
Jan 1955–Dec 1958
48-Month 		104.10"
(2,644.14mm)		 128.37"
(3,260.60mm)		 -24.27"
(-616.46mm)		 1st Driest
Driest since:
 1958
124th Wettest
Wettest since:
 2010
Jan 1954–Dec 1958
60-Month 		138.28"
(3,512.31mm)		 160.36"
(4,073.14mm)		 -22.08"
(-560.83mm)		 3rd Driest
Driest since:
 1956
121st Wettest
Wettest since:
 2010

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