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, January 1947

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
January 1947
1-Month
1.43"
(36.32mm)
0.98"
(24.89mm)
0.45"
(11.43mm)
104th Driest
Driest since:
1981
25th Wettest
Wettest since:
1949
Dec 1946–Jan 1947
2-Month
2.05"
(52.07mm)
2.08"
(52.83mm)
-0.03"
(-0.76mm)
66th Driest
Driest since:
2003
62nd Wettest
Wettest since:
2016
Ties: 1998
Nov 1946–Jan 1947
3-Month
3.78"
(96.01mm)
3.82"
(97.03mm)
-0.04"
(-1.02mm)
64th Driest
Driest since:
2003
64th Wettest
Wettest since:
1932
Oct 1946–Jan 1947
4-Month
7.09"
(180.09mm)
6.13"
(155.70mm)
0.96"
(24.39mm)
87th Driest
Driest since:
1911
41st Wettest
Wettest since:
1932
Sep 1946–Jan 1947
5-Month
12.11"
(307.59mm)
9.83"
(249.68mm)
2.28"
(57.91mm)
98th Driest
Driest since:
1977
30th Wettest
Wettest since:
1932
Ties: 1978
Aug 1946–Jan 1947
6-Month
15.71"
(399.03mm)
13.69"
(347.73mm)
2.02"
(51.30mm)
90th Driest
Driest since:
1977
38th Wettest
Wettest since:
2019
Jul 1946–Jan 1947
7-Month
18.19"
(462.03mm)
17.57"
(446.28mm)
0.62"
(15.75mm)
76th Driest
Driest since:
1977
52nd Wettest
Wettest since:
2019
Jun 1946–Jan 1947
8-Month
24.44"
(620.78mm)
22.18"
(563.37mm)
2.26"
(57.41mm)
92nd Driest
Driest since:
1977
36th Wettest
Wettest since:
2019
May 1946–Jan 1947
9-Month
28.96"
(735.58mm)
26.22"
(665.99mm)
2.74"
(69.59mm)
89th Driest
Driest since:
1977
39th Wettest
Wettest since:
1994
Apr 1946–Jan 1947
10-Month
30.10"
(764.54mm)
29.17"
(740.92mm)
0.93"
(23.62mm)
72nd Driest
Driest since:
1911
56th Wettest
Wettest since:
1994
Mar 1946–Jan 1947
11-Month
34.13"
(866.90mm)
31.14"
(790.96mm)
2.99"
(75.94mm)
85th Driest
Driest since:
1911
43rd Wettest
Wettest since:
1994
Feb 1946–Jan 1947
12-Month
34.50"
(876.30mm)
32.15"
(816.61mm)
2.35"
(59.69mm)
84th Driest
Driest since:
1911
44th Wettest
Wettest since:
1994
Aug 1945–Jan 1947
18-Month
47.33"
(1,202.18mm)
45.86"
(1,164.84mm)
1.47"
(37.34mm)
75th Driest
Driest since:
1957
52nd Wettest
Wettest since:
2020
Feb 1945–Jan 1947
24-Month
69.83"
(1,773.68mm)
64.28"
(1,632.71mm)
5.55"
(140.97mm)
93rd Driest
Driest since:
1990
34th Wettest
Wettest since:
2020
Feb 1944–Jan 1947
36-Month
106.09"
(2,694.69mm)
96.29"
(2,445.77mm)
9.80"
(248.92mm)
104th Driest
Driest since:
1958
22nd Wettest
Wettest since:
2011
Feb 1943–Jan 1947
48-Month
137.48"
(3,491.99mm)
128.27"
(3,258.06mm)
9.21"
(233.93mm)
93rd Driest
Driest since:
1959
32nd Wettest
Wettest since:
2011
Feb 1942–Jan 1947
60-Month
170.10"
(4,320.54mm)
160.30"
(4,071.62mm)
9.80"
(248.92mm)
90th Driest
Driest since:
1957
34th Wettest
Wettest since:
2011

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