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 2020

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 2020
1-Month 		3.99"
(101.35mm)		 2.90"
(73.66mm)		 1.09"
(27.69mm)		 100th Driest
Driest since:
 1963
29th Wettest
Wettest since:
 1919
Sep–Oct 2020
2-Month 		7.23"
(183.64mm)		 6.37"
(161.80mm)		 0.86"
(21.84mm)		 86th Driest
Driest since:
 1897
43rd Wettest
Wettest since:
 1926
Aug–Oct 2020
3-Month 		11.03"
(280.16mm)		 10.04"
(255.02mm)		 0.99"
(25.14mm)		 86th Driest
Driest since:
 1897
43rd Wettest
Wettest since:
 1926
Jul–Oct 2020
4-Month 		15.96"
(405.38mm)		 14.04"
(356.62mm)		 1.92"
(48.76mm)		 98th Driest
Driest since:
 1953
31st Wettest
Wettest since:
 1926
Jun–Oct 2020
5-Month 		19.87"
(504.70mm)		 18.29"
(464.57mm)		 1.58"
(40.13mm)		 83rd Driest
Driest since:
 1953
46th Wettest
Wettest since:
 1926
May–Oct 2020
6-Month 		25.30"
(642.62mm)		 22.56"
(573.02mm)		 2.74"
(69.60mm)		 94th Driest
Driest since:
 1930
35th Wettest
Wettest since:
 2009
Apr–Oct 2020
7-Month 		29.87"
(758.70mm)		 26.47"
(672.34mm)		 3.40"
(86.36mm)		 99th Driest
Driest since:
 1930
30th Wettest
Wettest since:
 2009
Mar–Oct 2020
8-Month 		35.34"
(897.64mm)		 30.28"
(769.11mm)		 5.06"
(128.53mm)		 113th Driest
Driest since:
 1930
16th Wettest
Wettest since:
 2009
Feb–Oct 2020
9-Month 		39.48"
(1,002.79mm)		 32.95"
(836.93mm)		 6.53"
(165.86mm)		 121st Driest
Driest since:
 1930
8th Wettest
Wettest since:
 2019
Jan–Oct 2020
10-Month 		44.05"
(1,118.87mm)		 36.00"
(914.40mm)		 8.05"
(204.47mm)		 123rd Driest
Driest since:
 1930
6th Wettest
Wettest since:
 2019
Dec 2019–Oct 2020
11-Month 		47.62"
(1,209.55mm)		 39.09"
(992.89mm)		 8.53"
(216.66mm)		 123rd Driest
Driest since:
 1930
5th Wettest
Wettest since:
 2019
Nov 2019–Oct 2020
12-Month 		50.76"
(1,289.30mm)		 42.23"
(1,072.64mm)		 8.53"
(216.66mm)		 122nd Driest
Driest since:
 1963
6th Wettest
Wettest since:
 2019
May 2019–Oct 2020
18-Month 		79.87"
(2,028.70mm)		 64.79"
(1,645.67mm)		 15.08"
(383.03mm)		 126th Driest
Driest since:
 1931
2nd Wettest
Wettest since:
 2019
Nov 2018–Oct 2020
24-Month 		106.60"
(2,707.64mm)		 84.46"
(2,145.28mm)		 22.14"
(562.36mm)		 126th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2020
Nov 2017–Oct 2020
36-Month 		155.63"
(3,953.00mm)		 126.69"
(3,217.93mm)		 28.94"
(735.07mm)		 125th Driest
Driest since:
 1954
1st Wettest
Wettest to Date
 2020
Nov 2016–Oct 2020
48-Month 		201.87"
(5,127.50mm)		 168.97"
(4,291.84mm)		 32.90"
(835.66mm)		 123rd Driest
Driest since:
 1956
2nd Wettest
Wettest to Date
 2021
Nov 2015–Oct 2020
60-Month 		250.43"
(6,360.92mm)		 211.20"
(5,364.48mm)		 39.23"
(996.44mm)		 123rd Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2020

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