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 2021

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 2021
1-Month 		5.31"
(134.87mm)		 2.90"
(73.66mm)		 2.41"
(61.21mm)		 124th Driest
Driest since:
 1963
5th Wettest
Wettest since:
 1919
Sep–Oct 2021
2-Month 		8.79"
(223.27mm)		 6.37"
(161.80mm)		 2.42"
(61.47mm)		 113th Driest
Driest since:
 1897
16th Wettest
Wettest since:
 1926
Aug–Oct 2021
3-Month 		13.20"
(335.28mm)		 10.04"
(255.02mm)		 3.16"
(80.26mm)		 119th Driest
Driest since:
 1897
10th Wettest
Wettest since:
 1926
Ties: 1941
Jul–Oct 2021
4-Month 		18.33"
(465.58mm)		 14.04"
(356.62mm)		 4.29"
(108.96mm)		 122nd Driest
Driest since:
 1953
7th Wettest
Wettest since:
 1926
Jun–Oct 2021
5-Month 		23.43"
(595.12mm)		 18.29"
(464.57mm)		 5.14"
(130.55mm)		 124th Driest
Driest since:
 1953
5th Wettest
Wettest since:
 1926
May–Oct 2021
6-Month 		27.56"
(700.02mm)		 22.56"
(573.02mm)		 5.00"
(127.00mm)		 119th Driest
Driest since:
 1930
10th Wettest
Wettest since:
 2009
Apr–Oct 2021
7-Month 		30.85"
(783.59mm)		 26.47"
(672.34mm)		 4.38"
(111.25mm)		 108th Driest
Driest since:
 1930
21st Wettest
Wettest since:
 2009
Mar–Oct 2021
8-Month 		36.16"
(918.46mm)		 30.28"
(769.11mm)		 5.88"
(149.35mm)		 120th Driest
Driest since:
 1930
9th Wettest
Wettest since:
 2009
Feb–Oct 2021
9-Month 		38.82"
(986.03mm)		 32.95"
(836.93mm)		 5.87"
(149.10mm)		 116th Driest
Driest since:
 1930
13th Wettest
Wettest since:
 2019
Jan–Oct 2021
10-Month 		41.76"
(1,060.70mm)		 36.00"
(914.40mm)		 5.76"
(146.30mm)		 113th Driest
Driest since:
 1930
16th Wettest
Wettest since:
 2019
Dec 2020–Oct 2021
11-Month 		44.32"
(1,125.73mm)		 39.09"
(992.89mm)		 5.23"
(132.84mm)		 110th Driest
Driest since:
 1930
18th Wettest
Wettest since:
 2019
Nov 2020–Oct 2021
12-Month 		47.00"
(1,193.80mm)		 42.23"
(1,072.64mm)		 4.77"
(121.16mm)		 105th Driest
Driest since:
 1963
23rd Wettest
Wettest since:
 2019
May 2020–Oct 2021
18-Month 		72.30"
(1,836.42mm)		 64.79"
(1,645.67mm)		 7.51"
(190.75mm)		 110th Driest
Driest since:
 1931
18th Wettest
Wettest since:
 2019
Nov 2019–Oct 2021
24-Month 		97.76"
(2,483.10mm)		 84.46"
(2,145.28mm)		 13.30"
(337.82mm)		 121st Driest
Driest since:
 1931
6th Wettest
Wettest since:
 2020
Nov 2018–Oct 2021
36-Month 		153.60"
(3,901.44mm)		 126.69"
(3,217.93mm)		 26.91"
(683.51mm)		 124th Driest
Driest since:
 1954
2nd Wettest
Wettest since:
 2020
Nov 2017–Oct 2021
48-Month 		202.63"
(5,146.80mm)		 168.97"
(4,291.84mm)		 33.66"
(854.96mm)		 124th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2021
Nov 2016–Oct 2021
60-Month 		248.87"
(6,321.30mm)		 211.20"
(5,364.48mm)		 37.67"
(956.82mm)		 122nd Driest
Driest since:
 1956
2nd Wettest
Wettest since:
 2020

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