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 2018

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 2018
1-Month
2.10"
(53.34mm)
1.11"
(28.19mm)
0.99"
(25.15mm)
119th Driest
Driest since:
2002
9th Wettest
Wettest since:
2015
Ties: 1984
Nov–Dec 2018
2-Month
3.91"
(99.31mm)
2.87"
(72.90mm)
1.04"
(26.41mm)
104th Driest
Driest since:
1976
24th Wettest
Wettest since:
2015
Ties: 1952
Oct–Dec 2018
3-Month
8.54"
(216.92mm)
5.16"
(131.06mm)
3.38"
(85.86mm)
117th Driest
Driest since:
1910
11th Wettest
Wettest since:
1931
Sep–Dec 2018
4-Month
16.64"
(422.66mm)
8.83"
(224.28mm)
7.81"
(198.38mm)
125th Driest
Driest since:
1939, 1976
3rd Wettest
Wettest since:
1931
Aug–Dec 2018
5-Month
23.06"
(585.72mm)
12.67"
(321.82mm)
10.39"
(263.90mm)
127th Driest
Driest since:
1976
1st Wettest
Wettest to Date
2018
Jul–Dec 2018
6-Month
26.45"
(671.83mm)
16.52"
(419.61mm)
9.93"
(252.22mm)
127th Driest
Driest since:
1976
1st Wettest
Wettest to Date
2018
Jun–Dec 2018
7-Month
34.00"
(863.60mm)
21.15"
(537.21mm)
12.85"
(326.39mm)
127th Driest
Driest since:
1976
1st Wettest
Wettest to Date
2018
May–Dec 2018
8-Month
38.70"
(982.98mm)
25.20"
(640.08mm)
13.50"
(342.90mm)
125th Driest
Driest since:
1976
3rd Wettest
Wettest since:
1993
Apr–Dec 2018
9-Month
40.24"
(1,022.10mm)
28.15"
(715.01mm)
12.09"
(307.09mm)
124th Driest
Driest since:
1910
4th Wettest
Wettest since:
1993
Mar–Dec 2018
10-Month
42.52"
(1,080.01mm)
30.10"
(764.54mm)
12.42"
(315.47mm)
126th Driest
Driest since:
1910
2nd Wettest
Wettest since:
1993
Feb–Dec 2018
11-Month
44.06"
(1,119.12mm)
31.12"
(790.45mm)
12.94"
(328.67mm)
126th Driest
Driest since:
1910
2nd Wettest
Wettest since:
1993
Jan–Dec 2018
12-Month
45.08"
(1,145.03mm)
32.09"
(815.09mm)
12.99"
(329.94mm)
126th Driest
Driest since:
1910
2nd Wettest
Wettest since:
1993
Jul 2017–Dec 2018
18-Month
60.22"
(1,529.59mm)
48.69"
(1,236.73mm)
11.53"
(292.86mm)
116th Driest
Driest since:
1956
11th Wettest
Wettest since:
1993
Jan 2017–Dec 2018
24-Month
77.44"
(1,966.98mm)
64.24"
(1,631.70mm)
13.20"
(335.28mm)
116th Driest
Driest since:
1989
11th Wettest
Wettest since:
2019
Jan 2016–Dec 2018
36-Month
115.54"
(2,934.72mm)
96.36"
(2,447.54mm)
19.18"
(487.18mm)
117th Driest
Driest since:
1957
9th Wettest
Wettest since:
2010
Jan 2015–Dec 2018
48-Month
158.07"
(4,014.98mm)
128.37"
(3,260.60mm)
29.70"
(754.38mm)
122nd Driest
Driest since:
1958
3rd Wettest
Wettest since:
2010
Jan 2014–Dec 2018
60-Month
196.76"
(4,997.70mm)
160.36"
(4,073.14mm)
36.40"
(924.56mm)
120th Driest
Driest since:
1956
4th Wettest
Wettest since:
2010

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