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, August 1975

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
August 1975
1-Month
5.12"
(130.05mm)
3.84"
(97.54mm)
1.28"
(32.51mm)
103rd Driest
Driest since:
1984
26th Wettest
Wettest since:
2007
Jul–Aug 1975
2-Month
6.08"
(154.43mm)
7.70"
(195.58mm)
-1.62"
(-41.15mm)
33rd Driest
Driest since:
1947
96th Wettest
Wettest since:
1993
Ties: 1946
Jun–Aug 1975
3-Month
11.46"
(291.08mm)
12.33"
(313.18mm)
-0.87"
(-22.10mm)
52nd Driest
Driest since:
1927
77th Wettest
Wettest since:
1993
Ties: 2006
May–Aug 1975
4-Month
14.76"
(374.90mm)
16.38"
(416.05mm)
-1.62"
(-41.15mm)
42nd Driest
Driest since:
1936
87th Wettest
Wettest since:
1993
Apr–Aug 1975
5-Month
18.58"
(471.93mm)
19.32"
(490.73mm)
-0.74"
(-18.80mm)
54th Driest
Driest since:
1936
75th Wettest
Wettest since:
1993
Mar–Aug 1975
6-Month
20.72"
(526.29mm)
21.28"
(540.51mm)
-0.56"
(-14.22mm)
56th Driest
Driest since:
1936
73rd Wettest
Wettest since:
1993
Feb–Aug 1975
7-Month
21.86"
(555.24mm)
22.29"
(566.17mm)
-0.43"
(-10.93mm)
59th Driest
Driest since:
1988
70th Wettest
Wettest since:
1993
Jan–Aug 1975
8-Month
23.39"
(594.11mm)
23.27"
(591.06mm)
0.12"
(3.05mm)
63rd Driest
Driest since:
1988
66th Wettest
Wettest since:
1993
Dec 1974–Aug 1975
9-Month
24.51"
(622.55mm)
24.37"
(619.00mm)
0.14"
(3.55mm)
63rd Driest
Driest since:
1988
65th Wettest
Wettest since:
1993
Nov 1974–Aug 1975
10-Month
25.92"
(658.37mm)
26.11"
(663.19mm)
-0.19"
(-4.82mm)
62nd Driest
Driest since:
1934
66th Wettest
Wettest since:
1993
Oct 1974–Aug 1975
11-Month
28.82"
(732.03mm)
28.42"
(721.87mm)
0.40"
(10.16mm)
68th Driest
Driest since:
1934
60th Wettest
Wettest since:
1993
Sep 1974–Aug 1975
12-Month
30.41"
(772.41mm)
32.12"
(815.85mm)
-1.71"
(-43.44mm)
47th Driest
Driest since:
1934
81st Wettest
Wettest since:
1993
Mar 1974–Aug 1975
18-Month
53.49"
(1,358.65mm)
53.43"
(1,357.12mm)
0.06"
(1.53mm)
65th Driest
Driest since:
1911
63rd Wettest
Wettest since:
1993
Sep 1973–Aug 1975
24-Month
69.14"
(1,756.16mm)
64.28"
(1,632.71mm)
4.86"
(123.45mm)
92nd Driest
Driest since:
1934
35th Wettest
Wettest since:
1993
Sep 1972–Aug 1975
36-Month
111.01"
(2,819.65mm)
96.39"
(2,448.31mm)
14.62"
(371.34mm)
110th Driest
Driest since:
1957
16th Wettest
Wettest since:
2010
Sep 1971–Aug 1975
48-Month
146.32"
(3,716.53mm)
128.37"
(3,260.60mm)
17.95"
(455.93mm)
110th Driest
Driest since:
1936
15th Wettest
Wettest since:
2010
Sep 1970–Aug 1975
60-Month
177.82"
(4,516.63mm)
160.37"
(4,073.40mm)
17.45"
(443.23mm)
106th Driest
Driest since:
1957
18th Wettest
Wettest to Date
2011

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