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, September 1897

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 1897
1-Month
1.97"
(50.04mm)
3.67"
(93.22mm)
-1.70"
(-43.18mm)
23rd Driest
Driest since:
1939
106th Wettest
Wettest since:
1965
Aug–Sep 1897
2-Month
4.02"
(102.11mm)
7.51"
(190.75mm)
-3.49"
(-88.64mm)
8th Driest
Driest since:
1976
121st Wettest
Wettest since:
2018
Jul–Sep 1897
3-Month
7.19"
(182.63mm)
11.36"
(288.54mm)
-4.17"
(-105.91mm)
9th Driest
Driest since:
2013
120th Wettest
Wettest since:
1993
Jun–Sep 1897
4-Month
11.09"
(281.69mm)
16.00"
(406.40mm)
-4.91"
(-124.71mm)
4th Driest
Driest since:
2012
125th Wettest
Wettest since:
1993
May–Sep 1897
5-Month
12.98"
(329.69mm)
20.04"
(509.02mm)
-7.06"
(-179.33mm)
3rd Driest
Driest since:
1976
126th Wettest
Wettest since:
1993
Apr–Sep 1897
6-Month
17.94"
(455.68mm)
22.99"
(583.95mm)
-5.05"
(-128.27mm)
14th Driest
Driest since:
1988
115th Wettest
Wettest since:
1993
Mar–Sep 1897
7-Month
20.23"
(513.84mm)
24.94"
(633.48mm)
-4.71"
(-119.64mm)
14th Driest
Driest since:
1988
115th Wettest
Wettest since:
1993
Feb–Sep 1897
8-Month
21.11"
(536.19mm)
25.96"
(659.38mm)
-4.85"
(-123.19mm)
13th Driest
Driest since:
1988
116th Wettest
Wettest since:
1993
Jan–Sep 1897
9-Month
22.96"
(583.18mm)
26.93"
(684.02mm)
-3.97"
(-100.84mm)
22nd Driest
Driest since:
1988
107th Wettest
Wettest since:
1993
Dec 1896–Sep 1897
10-Month
23.60"
(599.44mm)
28.04"
(712.22mm)
-4.44"
(-112.78mm)
17th Driest
Driest since:
1988
111th Wettest
Wettest since:
1993
Nov 1896–Sep 1897
11-Month
25.61"
(650.49mm)
29.78"
(756.41mm)
-4.17"
(-105.92mm)
22nd Driest
Driest since:
1934
106th Wettest
Wettest since:
1993
Oct 1896–Sep 1897
12-Month
28.82"
(732.03mm)
32.09"
(815.09mm)
-3.27"
(-83.06mm)
33rd Driest
Driest since:
1934
95th Wettest
Wettest since:
1993
Apr 1896–Sep 1897
18-Month
57.57"
(1,462.28mm)
55.13"
(1,400.30mm)
2.44"
(61.98mm)
81st Driest
Driest since:
1934
47th Wettest
Wettest to Date
1993
Oct 1895–Sep 1897
24-Month
63.15"
(1,604.01mm)
64.26"
(1,632.20mm)
-1.11"
(-28.19mm)
55th Driest
Driest since:
1956
72nd Wettest
Wettest to Date
1993

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