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 2005

View Period (Months):
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  • Record Driest
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  • Top 1/3
  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 2005
1-Month
3.29"
(83.57mm)
3.67"
(93.22mm)
-0.38"
(-9.65mm)
66th Driest
Driest since:
1939
63rd Wettest
Wettest since:
1965
Aug–Sep 2005
2-Month
6.31"
(160.27mm)
7.51"
(190.75mm)
-1.20"
(-30.48mm)
46th Driest
Driest since:
1976
83rd Wettest
Wettest since:
2018
Jul–Sep 2005
3-Month
9.58"
(243.33mm)
11.36"
(288.54mm)
-1.78"
(-45.21mm)
39th Driest
Driest since:
2013
90th Wettest
Wettest since:
1993
Jun–Sep 2005
4-Month
14.83"
(376.68mm)
16.00"
(406.40mm)
-1.17"
(-29.72mm)
50th Driest
Driest since:
2012
79th Wettest
Wettest since:
1993
May–Sep 2005
5-Month
18.68"
(474.47mm)
20.04"
(509.02mm)
-1.36"
(-34.55mm)
49th Driest
Driest since:
1976
80th Wettest
Wettest since:
1993
Apr–Sep 2005
6-Month
22.13"
(562.10mm)
22.99"
(583.95mm)
-0.86"
(-21.85mm)
51st Driest
Driest since:
1988
78th Wettest
Wettest since:
1993
Mar–Sep 2005
7-Month
23.18"
(588.77mm)
24.94"
(633.48mm)
-1.76"
(-44.71mm)
45th Driest
Driest since:
1988
84th Wettest
Wettest since:
1993
Feb–Sep 2005
8-Month
24.70"
(627.38mm)
25.96"
(659.38mm)
-1.26"
(-32.00mm)
52nd Driest
Driest since:
1988
77th Wettest
Wettest since:
1993
Ties: 1918
Jan–Sep 2005
9-Month
26.01"
(660.65mm)
26.93"
(684.02mm)
-0.92"
(-23.37mm)
54th Driest
Driest since:
1988
75th Wettest
Wettest since:
1993
Dec 2004–Sep 2005
10-Month
26.59"
(675.39mm)
28.04"
(712.22mm)
-1.45"
(-36.83mm)
52nd Driest
Driest since:
1988
76th Wettest
Wettest since:
1993
Ties: 1906
Nov 2004–Sep 2005
11-Month
28.80"
(731.52mm)
29.78"
(756.41mm)
-0.98"
(-24.89mm)
54th Driest
Driest since:
1934
74th Wettest
Wettest since:
1993
Oct 2004–Sep 2005
12-Month
30.85"
(783.59mm)
32.09"
(815.09mm)
-1.24"
(-31.50mm)
50th Driest
Driest since:
1934
78th Wettest
Wettest since:
1993
Apr 2004–Sep 2005
18-Month
55.54"
(1,410.72mm)
55.13"
(1,400.30mm)
0.41"
(10.42mm)
65th Driest
Driest since:
1934
63rd Wettest
Wettest since:
1993
Oct 2003–Sep 2005
24-Month
67.16"
(1,705.86mm)
64.26"
(1,632.20mm)
2.90"
(73.66mm)
80th Driest
Driest since:
1956
47th Wettest
Wettest since:
1993
Oct 2002–Sep 2005
36-Month
94.15"
(2,391.41mm)
96.36"
(2,447.54mm)
-2.21"
(-56.13mm)
52nd Driest
Driest since:
1957
74th Wettest
Wettest since:
2010
Oct 2001–Sep 2005
48-Month
124.43"
(3,160.52mm)
128.36"
(3,260.34mm)
-3.93"
(-99.82mm)
38th Driest
Driest since:
1958
87th Wettest
Wettest since:
2010
Oct 2000–Sep 2005
60-Month
159.80"
(4,058.92mm)
160.34"
(4,072.64mm)
-0.54"
(-13.72mm)
58th Driest
Driest since:
1957
66th Wettest
Wettest since:
2010

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