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 1989

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
December 1989
1-Month 		0.36"
(9.14mm)		 1.11"
(28.19mm)		 -0.75"
(-19.05mm)		 5th Driest
Driest since:
 2002
124th Wettest
Wettest since:
 2015
Nov–Dec 1989
2-Month 		0.63"
(16.00mm)		 2.87"
(72.90mm)		 -2.24"
(-56.90mm)		 3rd Driest
Driest since:
 1976
126th Wettest
Wettest since:
 2015
Oct–Dec 1989
3-Month 		2.55"
(64.77mm)		 5.16"
(131.06mm)		 -2.61"
(-66.29mm)		 7th Driest
Driest since:
 1910
122nd Wettest
Wettest since:
 1931
Sep–Dec 1989
4-Month 		7.39"
(187.71mm)		 8.83"
(224.28mm)		 -1.44"
(-36.57mm)		 47th Driest
Driest since:
 1939, 1976
82nd Wettest
Wettest since:
 1931
Aug–Dec 1989
5-Month 		10.97"
(278.64mm)		 12.67"
(321.82mm)		 -1.70"
(-43.18mm)		 42nd Driest
Driest since:
 1976
87th Wettest
Wettest since:
 2018
Ties: 1948
Jul–Dec 1989
6-Month 		14.31"
(363.47mm)		 16.52"
(419.61mm)		 -2.21"
(-56.14mm)		 39th Driest
Driest since:
 1976
90th Wettest
Wettest since:
 2018
Jun–Dec 1989
7-Month 		17.67"
(448.82mm)		 21.15"
(537.21mm)		 -3.48"
(-88.39mm)		 25th Driest
Driest since:
 1976
104th Wettest
Wettest since:
 2018
Ties: 1936
May–Dec 1989
8-Month 		20.24"
(514.10mm)		 25.20"
(640.08mm)		 -4.96"
(-125.98mm)		 15th Driest
Driest since:
 1976
114th Wettest
Wettest since:
 1993
Ties: 1929
Apr–Dec 1989
9-Month 		22.33"
(567.18mm)		 28.15"
(715.01mm)		 -5.82"
(-147.83mm)		 14th Driest
Driest since:
 1910
115th Wettest
Wettest since:
 1993
Mar–Dec 1989
10-Month 		23.23"
(590.04mm)		 30.10"
(764.54mm)		 -6.87"
(-174.50mm)		 8th Driest
Driest since:
 1910
121st Wettest
Wettest since:
 1993
Feb–Dec 1989
11-Month 		23.77"
(603.76mm)		 31.12"
(790.45mm)		 -7.35"
(-186.69mm)		 7th Driest
Driest since:
 1910
122nd Wettest
Wettest since:
 1993
Jan–Dec 1989
12-Month 		24.69"
(627.13mm)		 32.09"
(815.09mm)		 -7.40"
(-187.96mm)		 9th Driest
Driest since:
 1910
120th Wettest
Wettest since:
 1993
Jul 1988–Dec 1989
18-Month 		38.75"
(984.25mm)		 48.69"
(1,236.73mm)		 -9.94"
(-252.48mm)		 4th Driest
Driest since:
 1956
124th Wettest
Wettest since:
 1993
Jan 1988–Dec 1989
24-Month 		46.17"
(1,172.72mm)		 64.24"
(1,631.70mm)		 -18.07"
(-458.98mm)		 1st Driest
Driest to Date
 1989
127th Wettest
Wettest since:
 2019
Jan 1987–Dec 1989
36-Month 		79.02"
(2,007.11mm)		 96.36"
(2,447.54mm)		 -17.34"
(-440.43mm)		 2nd Driest
Driest since:
 1957
125th Wettest
Wettest since:
 2010
Jan 1986–Dec 1989
48-Month 		118.92"
(3,020.57mm)		 128.37"
(3,260.60mm)		 -9.45"
(-240.03mm)		 16th Driest
Driest since:
 1958
110th Wettest
Wettest since:
 2010
Jan 1985–Dec 1989
60-Month 		150.07"
(3,811.78mm)		 160.36"
(4,073.14mm)		 -10.29"
(-261.36mm)		 17th Driest
Driest since:
 1956
108th Wettest
Wettest since:
 2010

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