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 1991

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 1991
1-Month
0.77"
(19.56mm)
0.98"
(24.89mm)
-0.21"
(-5.33mm)
51st Driest
Driest since:
1981
78th Wettest
Wettest since:
1949
Ties: 1943, 1959
Dec 1990–Jan 1991
2-Month
2.27"
(57.66mm)
2.08"
(52.83mm)
0.19"
(4.83mm)
78th Driest
Driest since:
2003
50th Wettest
Wettest since:
2016
Nov 1990–Jan 1991
3-Month
3.92"
(99.57mm)
3.82"
(97.03mm)
0.10"
(2.54mm)
72nd Driest
Driest since:
2003
56th Wettest
Wettest since:
1932
Oct 1990–Jan 1991
4-Month
5.80"
(147.32mm)
6.13"
(155.70mm)
-0.33"
(-8.38mm)
57th Driest
Driest since:
1911
71st Wettest
Wettest since:
1932
Sep 1990–Jan 1991
5-Month
7.19"
(182.63mm)
9.83"
(249.68mm)
-2.64"
(-67.05mm)
28th Driest
Driest since:
1977
100th Wettest
Wettest since:
1932
Aug 1990–Jan 1991
6-Month
11.51"
(292.35mm)
13.69"
(347.73mm)
-2.18"
(-55.38mm)
34th Driest
Driest since:
1977
94th Wettest
Wettest since:
2019
Jul 1990–Jan 1991
7-Month
17.88"
(454.15mm)
17.57"
(446.28mm)
0.31"
(7.87mm)
72nd Driest
Driest since:
1977
56th Wettest
Wettest since:
2019
Jun 1990–Jan 1991
8-Month
25.84"
(656.34mm)
22.18"
(563.37mm)
3.66"
(92.97mm)
99th Driest
Driest since:
1977
29th Wettest
Wettest since:
2019
May 1990–Jan 1991
9-Month
31.57"
(801.88mm)
26.22"
(665.99mm)
5.35"
(135.89mm)
107th Driest
Driest since:
1977
21st Wettest
Wettest since:
1994
Apr 1990–Jan 1991
10-Month
33.83"
(859.28mm)
29.17"
(740.92mm)
4.66"
(118.36mm)
101st Driest
Driest since:
1911
27th Wettest
Wettest since:
1994
Mar 1990–Jan 1991
11-Month
38.13"
(968.50mm)
31.14"
(790.96mm)
6.99"
(177.54mm)
111th Driest
Driest since:
1911
17th Wettest
Wettest since:
1994
Feb 1990–Jan 1991
12-Month
38.80"
(985.52mm)
32.15"
(816.61mm)
6.65"
(168.91mm)
108th Driest
Driest since:
1911
20th Wettest
Wettest since:
1994
Aug 1989–Jan 1991
18-Month
50.65"
(1,286.51mm)
45.86"
(1,164.84mm)
4.79"
(121.67mm)
101st Driest
Driest since:
1957
26th Wettest
Wettest since:
2020
Feb 1989–Jan 1991
24-Month
63.45"
(1,611.63mm)
64.28"
(1,632.71mm)
-0.83"
(-21.08mm)
56th Driest
Driest since:
1990
71st Wettest
Wettest since:
2020
Feb 1988–Jan 1991
36-Month
85.09"
(2,161.29mm)
96.29"
(2,445.77mm)
-11.20"
(-284.48mm)
11th Driest
Driest since:
1958
115th Wettest
Wettest since:
2011
Feb 1987–Jan 1991
48-Month
118.38"
(3,006.85mm)
128.27"
(3,258.06mm)
-9.89"
(-251.21mm)
15th Driest
Driest since:
1959
110th Wettest
Wettest since:
2011
Feb 1986–Jan 1991
60-Month
158.38"
(4,022.85mm)
160.30"
(4,071.62mm)
-1.92"
(-48.77mm)
50th Driest
Driest since:
1957
74th Wettest
Wettest since:
2011

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