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 2020

View Period (Months):
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  • Record Driest
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  • Top 1/3
  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
January 2020
1-Month
1.41"
(35.81mm)
0.98"
(24.89mm)
0.43"
(10.92mm)
102nd Driest
Driest since:
1981
27th Wettest
Wettest since:
1949
Dec 2019–Jan 2020
2-Month
2.69"
(68.33mm)
2.08"
(52.83mm)
0.61"
(15.50mm)
100th Driest
Driest since:
2003
28th Wettest
Wettest since:
2016
Nov 2019–Jan 2020
3-Month
4.18"
(106.17mm)
3.82"
(97.03mm)
0.36"
(9.14mm)
78th Driest
Driest since:
2003
50th Wettest
Wettest since:
1932
Oct 2019–Jan 2020
4-Month
8.96"
(227.58mm)
6.13"
(155.70mm)
2.83"
(71.88mm)
113th Driest
Driest since:
1911
15th Wettest
Wettest since:
1932
Sep 2019–Jan 2020
5-Month
15.17"
(385.32mm)
9.83"
(249.68mm)
5.34"
(135.64mm)
122nd Driest
Driest since:
1977
6th Wettest
Wettest since:
1932
Aug 2019–Jan 2020
6-Month
18.70"
(474.98mm)
13.69"
(347.73mm)
5.01"
(127.25mm)
116th Driest
Driest since:
1977
12th Wettest
Wettest since:
2019
Jul 2019–Jan 2020
7-Month
22.08"
(560.83mm)
17.57"
(446.28mm)
4.51"
(114.55mm)
107th Driest
Driest since:
1977
21st Wettest
Wettest since:
2019
Jun 2019–Jan 2020
8-Month
25.99"
(660.15mm)
22.18"
(563.37mm)
3.81"
(96.78mm)
100th Driest
Driest since:
1977
28th Wettest
Wettest since:
2019
May 2019–Jan 2020
9-Month
34.20"
(868.68mm)
26.22"
(665.99mm)
7.98"
(202.69mm)
120th Driest
Driest since:
1977
8th Wettest
Wettest since:
1994
Apr 2019–Jan 2020
10-Month
37.23"
(945.64mm)
29.17"
(740.92mm)
8.06"
(204.72mm)
119th Driest
Driest since:
1911
9th Wettest
Wettest since:
1994
Mar 2019–Jan 2020
11-Month
39.42"
(1,001.27mm)
31.14"
(790.96mm)
8.28"
(210.31mm)
117th Driest
Driest since:
1911
11th Wettest
Wettest since:
1994
Feb 2019–Jan 2020
12-Month
41.76"
(1,060.70mm)
32.15"
(816.61mm)
9.61"
(244.09mm)
118th Driest
Driest since:
1911
10th Wettest
Wettest since:
1994
Aug 2018–Jan 2020
18-Month
66.10"
(1,678.94mm)
45.86"
(1,164.84mm)
20.24"
(514.10mm)
126th Driest
Driest since:
1957
1st Wettest
Wettest to Date
2020
Feb 2018–Jan 2020
24-Month
87.10"
(2,212.34mm)
64.28"
(1,632.71mm)
22.82"
(579.63mm)
126th Driest
Driest since:
1990
1st Wettest
Wettest to Date
2020
Feb 2017–Jan 2020
36-Month
118.92"
(3,020.57mm)
96.29"
(2,445.77mm)
22.63"
(574.80mm)
121st Driest
Driest since:
1958
5th Wettest
Wettest since:
2011
Feb 2016–Jan 2020
48-Month
157.99"
(4,012.95mm)
128.27"
(3,258.06mm)
29.72"
(754.89mm)
121st Driest
Driest since:
1959
4th Wettest
Wettest since:
2011
Feb 2015–Jan 2020
60-Month
200.59"
(5,094.99mm)
160.30"
(4,071.62mm)
40.29"
(1,023.37mm)
122nd Driest
Driest since:
1957
2nd Wettest
Wettest since:
2011

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