Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Ohio Valley Climate Region

Precipitation Rankings, October 2009

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 2009
1-Month
7.13"
(181.10mm)
2.90"
(73.66mm)
4.23"
(107.44mm)
127th Driest
Driest since:
1963
2nd Wettest
Wettest since:
1919
Sep–Oct 2009
2-Month
11.01"
(279.65mm)
6.37"
(161.80mm)
4.64"
(117.85mm)
127th Driest
Driest since:
1897
2nd Wettest
Wettest since:
1926
Aug–Oct 2009
3-Month
14.96"
(379.98mm)
10.04"
(255.02mm)
4.92"
(124.96mm)
127th Driest
Driest since:
1897
2nd Wettest
Wettest since:
1926
Jul–Oct 2009
4-Month
20.07"
(509.78mm)
14.04"
(356.62mm)
6.03"
(153.16mm)
127th Driest
Driest since:
1953
2nd Wettest
Wettest since:
1926
Jun–Oct 2009
5-Month
24.96"
(633.98mm)
18.29"
(464.57mm)
6.67"
(169.41mm)
127th Driest
Driest since:
1953
2nd Wettest
Wettest since:
1926
May–Oct 2009
6-Month
31.00"
(787.40mm)
22.56"
(573.02mm)
8.44"
(214.38mm)
128th Driest
Driest since:
1930
1st Wettest
Wettest to Date
2009
Apr–Oct 2009
7-Month
36.01"
(914.65mm)
26.47"
(672.34mm)
9.54"
(242.31mm)
128th Driest
Driest since:
1930
1st Wettest
Wettest to Date
2009
Mar–Oct 2009
8-Month
39.59"
(1,005.59mm)
30.28"
(769.11mm)
9.31"
(236.48mm)
128th Driest
Driest since:
1930
1st Wettest
Wettest to Date
2009
Feb–Oct 2009
9-Month
41.85"
(1,062.99mm)
32.95"
(836.93mm)
8.90"
(226.06mm)
126th Driest
Driest since:
1930
3rd Wettest
Wettest to Date
2019
Jan–Oct 2009
10-Month
44.32"
(1,125.73mm)
36.00"
(914.40mm)
8.32"
(211.33mm)
124th Driest
Driest since:
1930
5th Wettest
Wettest since:
2019
Dec 2008–Oct 2009
11-Month
49.31"
(1,252.47mm)
39.09"
(992.89mm)
10.22"
(259.58mm)
126th Driest
Driest since:
1930
2nd Wettest
Wettest to Date
2019
Nov 2008–Oct 2009
12-Month
51.42"
(1,306.07mm)
42.23"
(1,072.64mm)
9.19"
(233.43mm)
124th Driest
Driest since:
1963
4th Wettest
Wettest since:
2019
May 2008–Oct 2009
18-Month
76.17"
(1,934.72mm)
64.79"
(1,645.67mm)
11.38"
(289.05mm)
124th Driest
Driest since:
1931
4th Wettest
Wettest since:
2019
Nov 2007–Oct 2009
24-Month
101.24"
(2,571.50mm)
84.46"
(2,145.28mm)
16.78"
(426.22mm)
124th Driest
Driest since:
1931
3rd Wettest
Wettest to Date
2020
Nov 2006–Oct 2009
36-Month
140.39"
(3,565.91mm)
126.69"
(3,217.93mm)
13.70"
(347.98mm)
115th Driest
Driest since:
1954
11th Wettest
Wettest since:
2020
Nov 2005–Oct 2009
48-Month
183.70"
(4,665.98mm)
168.97"
(4,291.84mm)
14.73"
(374.14mm)
109th Driest
Driest since:
1956
16th Wettest
Wettest since:
2021
Nov 2004–Oct 2009
60-Month
225.19"
(5,719.83mm)
211.20"
(5,364.48mm)
13.99"
(355.35mm)
100th Driest
Driest since:
1956
24th Wettest
Wettest since:
2020

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