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 1956

View Period (Months):
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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 1956
1-Month
0.52"
(13.21mm)
1.11"
(28.19mm)
-0.59"
(-14.98mm)
17th Driest
Driest since:
2002
111th Wettest
Wettest since:
2015
Ties: 1943
Nov–Dec 1956
2-Month
2.55"
(64.77mm)
2.87"
(72.90mm)
-0.32"
(-8.13mm)
56th Driest
Driest since:
1976
72nd Wettest
Wettest since:
2015
Oct–Dec 1956
3-Month
3.95"
(100.33mm)
5.16"
(131.06mm)
-1.21"
(-30.73mm)
38th Driest
Driest since:
1910
90th Wettest
Wettest since:
1931
Sep–Dec 1956
4-Month
5.49"
(139.45mm)
8.83"
(224.28mm)
-3.34"
(-84.83mm)
15th Driest
Driest since:
1939, 1976
113th Wettest
Wettest since:
1931
Aug–Dec 1956
5-Month
9.98"
(253.49mm)
12.67"
(321.82mm)
-2.69"
(-68.33mm)
24th Driest
Driest since:
1976
104th Wettest
Wettest since:
2018
Jul–Dec 1956
6-Month
14.50"
(368.30mm)
16.52"
(419.61mm)
-2.02"
(-51.31mm)
40th Driest
Driest since:
1976
88th Wettest
Wettest since:
2018
Jun–Dec 1956
7-Month
17.10"
(434.34mm)
21.15"
(537.21mm)
-4.05"
(-102.87mm)
20th Driest
Driest since:
1976
108th Wettest
Wettest since:
2018
May–Dec 1956
8-Month
20.38"
(517.65mm)
25.20"
(640.08mm)
-4.82"
(-122.43mm)
17th Driest
Driest since:
1976
111th Wettest
Wettest since:
1993
Apr–Dec 1956
9-Month
22.36"
(567.94mm)
28.15"
(715.01mm)
-5.79"
(-147.07mm)
15th Driest
Driest since:
1910
113th Wettest
Wettest since:
1993
Mar–Dec 1956
10-Month
23.29"
(591.57mm)
30.10"
(764.54mm)
-6.81"
(-172.97mm)
10th Driest
Driest since:
1910
118th Wettest
Wettest since:
1993
Feb–Dec 1956
11-Month
23.83"
(605.28mm)
31.12"
(790.45mm)
-7.29"
(-185.17mm)
9th Driest
Driest since:
1910
119th Wettest
Wettest since:
1993
Jan–Dec 1956
12-Month
24.28"
(616.71mm)
32.09"
(815.09mm)
-7.81"
(-198.38mm)
5th Driest
Driest since:
1910
123rd Wettest
Wettest since:
1993
Jul 1955–Dec 1956
18-Month
34.88"
(885.95mm)
48.69"
(1,236.73mm)
-13.81"
(-350.78mm)
1st Driest
Driest since:
1956
126th Wettest
Wettest since:
1993
Jan 1955–Dec 1956
24-Month
47.25"
(1,200.15mm)
64.24"
(1,631.70mm)
-16.99"
(-431.55mm)
2nd Driest
Driest since:
1989
125th Wettest
Wettest since:
2019
Jan 1954–Dec 1956
36-Month
81.43"
(2,068.32mm)
96.36"
(2,447.54mm)
-14.93"
(-379.22mm)
5th Driest
Driest since:
1957
121st Wettest
Wettest since:
2010
Jan 1953–Dec 1956
48-Month
107.22"
(2,723.39mm)
128.37"
(3,260.60mm)
-21.15"
(-537.21mm)
2nd Driest
Driest since:
1958
123rd Wettest
Wettest since:
2010
Jan 1952–Dec 1956
60-Month
136.73"
(3,472.94mm)
160.36"
(4,073.14mm)
-23.63"
(-600.20mm)
1st Driest
Driest since:
1956
123rd Wettest
Wettest since:
2010

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