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 2019

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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2021)		 Wettest/Driest
Since		 Record
December 2019
1-Month 		1.28"
(32.51mm)		 1.11"
(28.19mm)		 0.17"
(4.32mm)		 82nd Driest
Driest since:
 2002
46th Wettest
Wettest since:
 2015
Ties: 2003
Nov–Dec 2019
2-Month 		2.77"
(70.36mm)		 2.87"
(72.90mm)		 -0.10"
(-2.54mm)		 65th Driest
Driest since:
 1976
63rd Wettest
Wettest since:
 2015
Oct–Dec 2019
3-Month 		7.55"
(191.77mm)		 5.16"
(131.06mm)		 2.39"
(60.71mm)		 113th Driest
Driest since:
 1910
15th Wettest
Wettest since:
 1931
Sep–Dec 2019
4-Month 		13.76"
(349.50mm)		 8.83"
(224.28mm)		 4.93"
(125.22mm)		 119th Driest
Driest since:
 1939, 1976
9th Wettest
Wettest since:
 1931
Aug–Dec 2019
5-Month 		17.29"
(439.17mm)		 12.67"
(321.82mm)		 4.62"
(117.35mm)		 114th Driest
Driest since:
 1976
14th Wettest
Wettest since:
 2018
Jul–Dec 2019
6-Month 		20.67"
(525.02mm)		 16.52"
(419.61mm)		 4.15"
(105.41mm)		 105th Driest
Driest since:
 1976
23rd Wettest
Wettest since:
 2018
Ties: 1987
Jun–Dec 2019
7-Month 		24.58"
(624.33mm)		 21.15"
(537.21mm)		 3.43"
(87.12mm)		 99th Driest
Driest since:
 1976
29th Wettest
Wettest since:
 2018
May–Dec 2019
8-Month 		32.79"
(832.87mm)		 25.20"
(640.08mm)		 7.59"
(192.79mm)		 120th Driest
Driest since:
 1976
8th Wettest
Wettest since:
 1993
Apr–Dec 2019
9-Month 		35.82"
(909.83mm)		 28.15"
(715.01mm)		 7.67"
(194.82mm)		 116th Driest
Driest since:
 1910
12th Wettest
Wettest since:
 1993
Mar–Dec 2019
10-Month 		38.01"
(965.45mm)		 30.10"
(764.54mm)		 7.91"
(200.91mm)		 116th Driest
Driest since:
 1910
12th Wettest
Wettest since:
 1993
Feb–Dec 2019
11-Month 		40.35"
(1,024.89mm)		 31.12"
(790.45mm)		 9.23"
(234.44mm)		 118th Driest
Driest since:
 1910
10th Wettest
Wettest since:
 1993
Jan–Dec 2019
12-Month 		41.63"
(1,057.40mm)		 32.09"
(815.09mm)		 9.54"
(242.31mm)		 118th Driest
Driest since:
 1910
10th Wettest
Wettest since:
 1993
Jul 2018–Dec 2019
18-Month 		68.08"
(1,729.23mm)		 48.69"
(1,236.73mm)		 19.39"
(492.50mm)		 125th Driest
Driest since:
 1956
2nd Wettest
Wettest since:
 1993
Jan 2018–Dec 2019
24-Month 		86.71"
(2,202.43mm)		 64.24"
(1,631.70mm)		 22.47"
(570.73mm)		 126th Driest
Driest since:
 1989
1st Wettest
Wettest to Date
 2019
Jan 2017–Dec 2019
36-Month 		119.07"
(3,024.38mm)		 96.36"
(2,447.54mm)		 22.71"
(576.84mm)		 121st Driest
Driest since:
 1957
5th Wettest
Wettest since:
 2010
Jan 2016–Dec 2019
48-Month 		157.17"
(3,992.12mm)		 128.37"
(3,260.60mm)		 28.80"
(731.52mm)		 120th Driest
Driest since:
 1958
5th Wettest
Wettest since:
 2010
Jan 2015–Dec 2019
60-Month 		199.70"
(5,072.38mm)		 160.36"
(4,073.14mm)		 39.34"
(999.24mm)		 121st Driest
Driest since:
 1956
3rd Wettest
Wettest since:
 2010

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