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 1990

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 1990
1-Month
1.50"
(38.10mm)
1.11"
(28.19mm)
0.39"
(9.91mm)
95th Driest
Driest since:
2002
33rd Wettest
Wettest since:
2015
Nov–Dec 1990
2-Month
3.15"
(80.01mm)
2.87"
(72.90mm)
0.28"
(7.11mm)
77th Driest
Driest since:
1976
51st Wettest
Wettest since:
2015
Ties: 1981
Oct–Dec 1990
3-Month
5.03"
(127.76mm)
5.16"
(131.06mm)
-0.13"
(-3.30mm)
62nd Driest
Driest since:
1910
66th Wettest
Wettest since:
1931
Ties: 2014
Sep–Dec 1990
4-Month
6.42"
(163.07mm)
8.83"
(224.28mm)
-2.41"
(-61.21mm)
24th Driest
Driest since:
1939, 1976
104th Wettest
Wettest since:
1931
Aug–Dec 1990
5-Month
10.74"
(272.80mm)
12.67"
(321.82mm)
-1.93"
(-49.02mm)
36th Driest
Driest since:
1976
92nd Wettest
Wettest since:
2018
Jul–Dec 1990
6-Month
17.11"
(434.59mm)
16.52"
(419.61mm)
0.59"
(14.98mm)
77th Driest
Driest since:
1976
51st Wettest
Wettest since:
2018
Jun–Dec 1990
7-Month
25.07"
(636.78mm)
21.15"
(537.21mm)
3.92"
(99.57mm)
103rd Driest
Driest since:
1976
25th Wettest
Wettest since:
2018
May–Dec 1990
8-Month
30.80"
(782.32mm)
25.20"
(640.08mm)
5.60"
(142.24mm)
111th Driest
Driest since:
1976
17th Wettest
Wettest since:
1993
Apr–Dec 1990
9-Month
33.06"
(839.72mm)
28.15"
(715.01mm)
4.91"
(124.71mm)
105th Driest
Driest since:
1910
23rd Wettest
Wettest since:
1993
Mar–Dec 1990
10-Month
37.36"
(948.94mm)
30.10"
(764.54mm)
7.26"
(184.40mm)
113th Driest
Driest since:
1910
15th Wettest
Wettest since:
1993
Feb–Dec 1990
11-Month
38.03"
(965.96mm)
31.12"
(790.45mm)
6.91"
(175.51mm)
111th Driest
Driest since:
1910
17th Wettest
Wettest since:
1993
Jan–Dec 1990
12-Month
38.91"
(988.31mm)
32.09"
(815.09mm)
6.82"
(173.22mm)
110th Driest
Driest since:
1910
18th Wettest
Wettest since:
1993
Jul 1989–Dec 1990
18-Month
53.22"
(1,351.79mm)
48.69"
(1,236.73mm)
4.53"
(115.06mm)
90th Driest
Driest since:
1956
37th Wettest
Wettest since:
1993
Jan 1989–Dec 1990
24-Month
63.60"
(1,615.44mm)
64.24"
(1,631.70mm)
-0.64"
(-16.26mm)
61st Driest
Driest since:
1989
66th Wettest
Wettest since:
2019
Jan 1988–Dec 1990
36-Month
85.08"
(2,161.03mm)
96.36"
(2,447.54mm)
-11.28"
(-286.51mm)
11th Driest
Driest since:
1957
115th Wettest
Wettest since:
2010
Jan 1987–Dec 1990
48-Month
117.93"
(2,995.42mm)
128.37"
(3,260.60mm)
-10.44"
(-265.18mm)
12th Driest
Driest since:
1958
113th Wettest
Wettest since:
2010
Jan 1986–Dec 1990
60-Month
157.83"
(4,008.88mm)
160.36"
(4,073.14mm)
-2.53"
(-64.26mm)
48th Driest
Driest since:
1956
76th Wettest
Wettest since:
2010

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