Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 1975

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
October 1975
1-Month 		2.95"
(74.93mm)		 2.90"
(73.66mm)		 0.05"
(1.27mm)		 73rd Driest
Driest since:
 1963
56th Wettest
Wettest since:
 1919
Sep–Oct 1975
2-Month 		7.53"
(191.26mm)		 6.37"
(161.80mm)		 1.16"
(29.46mm)		 96th Driest
Driest since:
 1897
33rd Wettest
Wettest since:
 1926
Aug–Oct 1975
3-Month 		12.43"
(315.72mm)		 10.04"
(255.02mm)		 2.39"
(60.70mm)		 111th Driest
Driest since:
 1897
18th Wettest
Wettest since:
 1926
Jul–Oct 1975
4-Month 		15.33"
(389.38mm)		 14.04"
(356.62mm)		 1.29"
(32.76mm)		 84th Driest
Driest since:
 1953
45th Wettest
Wettest since:
 1926
Jun–Oct 1975
5-Month 		19.42"
(493.27mm)		 18.29"
(464.57mm)		 1.13"
(28.70mm)		 74th Driest
Driest since:
 1953
55th Wettest
Wettest since:
 1926
May–Oct 1975
6-Month 		23.54"
(597.92mm)		 22.56"
(573.02mm)		 0.98"
(24.90mm)		 72nd Driest
Driest since:
 1930
57th Wettest
Wettest since:
 2009
Apr–Oct 1975
7-Month 		27.43"
(696.72mm)		 26.47"
(672.34mm)		 0.96"
(24.38mm)		 67th Driest
Driest since:
 1930
62nd Wettest
Wettest since:
 2009
Mar–Oct 1975
8-Month 		33.64"
(854.46mm)		 30.28"
(769.11mm)		 3.36"
(85.35mm)		 98th Driest
Driest since:
 1930
31st Wettest
Wettest since:
 2009
Feb–Oct 1975
9-Month 		37.49"
(952.25mm)		 32.95"
(836.93mm)		 4.54"
(115.32mm)		 106th Driest
Driest since:
 1930
23rd Wettest
Wettest since:
 2019
Jan–Oct 1975
10-Month 		41.35"
(1,050.29mm)		 36.00"
(914.40mm)		 5.35"
(135.89mm)		 111th Driest
Driest since:
 1930
18th Wettest
Wettest since:
 2019
Dec 1974–Oct 1975
11-Month 		44.49"
(1,130.05mm)		 39.09"
(992.89mm)		 5.40"
(137.16mm)		 111th Driest
Driest since:
 1930
17th Wettest
Wettest since:
 2019
Nov 1974–Oct 1975
12-Month 		48.13"
(1,222.50mm)		 42.23"
(1,072.64mm)		 5.90"
(149.86mm)		 110th Driest
Driest since:
 1963
18th Wettest
Wettest since:
 2019
May 1974–Oct 1975
18-Month 		72.89"
(1,851.41mm)		 64.79"
(1,645.67mm)		 8.10"
(205.74mm)		 112th Driest
Driest since:
 1931
16th Wettest
Wettest since:
 2019
Nov 1973–Oct 1975
24-Month 		96.94"
(2,462.28mm)		 84.46"
(2,145.28mm)		 12.48"
(317.00mm)		 120th Driest
Driest since:
 1931
7th Wettest
Wettest since:
 2020
Nov 1972–Oct 1975
36-Month 		149.31"
(3,792.47mm)		 126.69"
(3,217.93mm)		 22.62"
(574.54mm)		 122nd Driest
Driest since:
 1954
4th Wettest
Wettest to Date
 2020
Nov 1971–Oct 1975
48-Month 		193.33"
(4,910.58mm)		 168.97"
(4,291.84mm)		 24.36"
(618.74mm)		 120th Driest
Driest since:
 1956
5th Wettest
Wettest to Date
 2021
Nov 1970–Oct 1975
60-Month 		229.98"
(5,841.49mm)		 211.20"
(5,364.48mm)		 18.78"
(477.01mm)		 112th Driest
Driest since:
 1956
12th Wettest
Wettest to Date
 2020

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