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 1947

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 1947
1-Month
1.45"
(36.83mm)
1.11"
(28.19mm)
0.34"
(8.64mm)
91st Driest
Driest since:
2002
37th Wettest
Wettest since:
2015
Ties: 1895, 1906
Nov–Dec 1947
2-Month
3.33"
(84.58mm)
2.87"
(72.90mm)
0.46"
(11.68mm)
84th Driest
Driest since:
1976
44th Wettest
Wettest since:
2015
Oct–Dec 1947
3-Month
7.07"
(179.58mm)
5.16"
(131.06mm)
1.91"
(48.52mm)
108th Driest
Driest since:
1910
20th Wettest
Wettest since:
1931
Sep–Dec 1947
4-Month
9.17"
(232.92mm)
8.83"
(224.28mm)
0.34"
(8.64mm)
77th Driest
Driest since:
1939, 1976
51st Wettest
Wettest since:
1931
Aug–Dec 1947
5-Month
10.67"
(271.02mm)
12.67"
(321.82mm)
-2.00"
(-50.80mm)
35th Driest
Driest since:
1976
93rd Wettest
Wettest since:
2018
Jul–Dec 1947
6-Month
12.32"
(312.93mm)
16.52"
(419.61mm)
-4.20"
(-106.68mm)
17th Driest
Driest since:
1976
111th Wettest
Wettest since:
2018
Jun–Dec 1947
7-Month
22.22"
(564.39mm)
21.15"
(537.21mm)
1.07"
(27.18mm)
74th Driest
Driest since:
1976
54th Wettest
Wettest since:
2018
May–Dec 1947
8-Month
26.45"
(671.83mm)
25.20"
(640.08mm)
1.25"
(31.75mm)
75th Driest
Driest since:
1976
53rd Wettest
Wettest since:
1993
Apr–Dec 1947
9-Month
31.36"
(796.54mm)
28.15"
(715.01mm)
3.21"
(81.53mm)
90th Driest
Driest since:
1910
38th Wettest
Wettest since:
1993
Mar–Dec 1947
10-Month
32.71"
(830.83mm)
30.10"
(764.54mm)
2.61"
(66.29mm)
86th Driest
Driest since:
1910
42nd Wettest
Wettest since:
1993
Feb–Dec 1947
11-Month
33.01"
(838.45mm)
31.12"
(790.45mm)
1.89"
(48.00mm)
80th Driest
Driest since:
1910
48th Wettest
Wettest since:
1993
Ties: 1969
Jan–Dec 1947
12-Month
34.44"
(874.78mm)
32.09"
(815.09mm)
2.35"
(59.69mm)
84th Driest
Driest since:
1910
44th Wettest
Wettest since:
1993
Ties: 2013
Jul 1946–Dec 1947
18-Month
51.20"
(1,300.48mm)
48.69"
(1,236.73mm)
2.51"
(63.75mm)
81st Driest
Driest since:
1956
46th Wettest
Wettest since:
1993
Jan 1946–Dec 1947
24-Month
69.30"
(1,760.22mm)
64.24"
(1,631.70mm)
5.06"
(128.52mm)
92nd Driest
Driest since:
1989
35th Wettest
Wettest since:
2019
Jan 1945–Dec 1947
36-Month
103.51"
(2,629.15mm)
96.36"
(2,447.54mm)
7.15"
(181.61mm)
95th Driest
Driest since:
1957
31st Wettest
Wettest since:
2010
Jan 1944–Dec 1947
48-Month
140.17"
(3,560.32mm)
128.37"
(3,260.60mm)
11.80"
(299.72mm)
100th Driest
Driest since:
1958
25th Wettest
Wettest since:
2010
Jan 1943–Dec 1947
60-Month
171.26"
(4,350.00mm)
160.36"
(4,073.14mm)
10.90"
(276.86mm)
94th Driest
Driest since:
1956
30th Wettest
Wettest since:
2010

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