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 1915

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 1915
1-Month
0.66"
(16.76mm)
1.11"
(28.19mm)
-0.45"
(-11.43mm)
32nd Driest
Driest since:
2002
96th Wettest
Wettest since:
2015
Nov–Dec 1915
2-Month
2.56"
(65.02mm)
2.87"
(72.90mm)
-0.31"
(-7.88mm)
57th Driest
Driest since:
1976
71st Wettest
Wettest since:
2015
Ties: 1916
Oct–Dec 1915
3-Month
3.84"
(97.54mm)
5.16"
(131.06mm)
-1.32"
(-33.52mm)
35th Driest
Driest since:
1910
93rd Wettest
Wettest since:
1931
Sep–Dec 1915
4-Month
9.92"
(251.97mm)
8.83"
(224.28mm)
1.09"
(27.69mm)
85th Driest
Driest since:
1939, 1976
43rd Wettest
Wettest since:
1931
Aug–Dec 1915
5-Month
12.74"
(323.60mm)
12.67"
(321.82mm)
0.07"
(1.78mm)
68th Driest
Driest since:
1976
60th Wettest
Wettest since:
2018
Jul–Dec 1915
6-Month
20.80"
(528.32mm)
16.52"
(419.61mm)
4.28"
(108.71mm)
106th Driest
Driest since:
1976
22nd Wettest
Wettest since:
2018
Jun–Dec 1915
7-Month
24.90"
(632.46mm)
21.15"
(537.21mm)
3.75"
(95.25mm)
101st Driest
Driest since:
1976
27th Wettest
Wettest since:
2018
May–Dec 1915
8-Month
32.25"
(819.15mm)
25.20"
(640.08mm)
7.05"
(179.07mm)
118th Driest
Driest since:
1976
10th Wettest
Wettest since:
1993
Apr–Dec 1915
9-Month
33.57"
(852.68mm)
28.15"
(715.01mm)
5.42"
(137.67mm)
107th Driest
Driest since:
1910
21st Wettest
Wettest since:
1993
Mar–Dec 1915
10-Month
34.49"
(876.05mm)
30.10"
(764.54mm)
4.39"
(111.51mm)
99th Driest
Driest since:
1910
29th Wettest
Wettest since:
1993
Feb–Dec 1915
11-Month
37.35"
(948.69mm)
31.12"
(790.45mm)
6.23"
(158.24mm)
108th Driest
Driest since:
1910
20th Wettest
Wettest since:
1993
Jan–Dec 1915
12-Month
38.98"
(990.09mm)
32.09"
(815.09mm)
6.89"
(175.00mm)
111th Driest
Driest since:
1910
17th Wettest
Wettest since:
1993
Jul 1914–Dec 1915
18-Month
55.68"
(1,414.27mm)
48.69"
(1,236.73mm)
6.99"
(177.54mm)
110th Driest
Driest since:
1956
17th Wettest
Wettest since:
1993
Jan 1914–Dec 1915
24-Month
70.63"
(1,794.00mm)
64.24"
(1,631.70mm)
6.39"
(162.30mm)
94th Driest
Driest since:
1989
33rd Wettest
Wettest since:
2019
Jan 1913–Dec 1915
36-Month
100.71"
(2,558.03mm)
96.36"
(2,447.54mm)
4.35"
(110.49mm)
84th Driest
Driest since:
1957
42nd Wettest
Wettest since:
2010
Jan 1912–Dec 1915
48-Month
129.13"
(3,279.90mm)
128.37"
(3,260.60mm)
0.76"
(19.30mm)
66th Driest
Driest since:
1958
59th Wettest
Wettest since:
2010
Jan 1911–Dec 1915
60-Month
160.76"
(4,083.30mm)
160.36"
(4,073.14mm)
0.40"
(10.16mm)
63rd Driest
Driest since:
1956
61st Wettest
Wettest since:
2010

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