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, August 1899

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
August 1899
1-Month 		2.78"
(70.61mm)		 3.67"
(93.22mm)		 -0.89"
(-22.61mm)		 23rd Driest
Driest since:
 1953
106th Wettest
Wettest since:
 1915
Ties: 1945
Jul–Aug 1899
2-Month 		6.84"
(173.74mm)		 7.67"
(194.82mm)		 -0.83"
(-21.08mm)		 28th Driest
Driest since:
 1930
101st Wettest
Wettest since:
 1915
Jun–Aug 1899
3-Month 		10.07"
(255.78mm)		 11.92"
(302.77mm)		 -1.85"
(-46.99mm)		 19th Driest
Driest since:
 1930
110th Wettest
Wettest since:
 1958
May–Aug 1899
4-Month 		15.04"
(382.02mm)		 16.19"
(411.23mm)		 -1.15"
(-29.21mm)		 39th Driest
Driest since:
 1936
90th Wettest
Wettest since:
 1915
Apr–Aug 1899
5-Month 		17.57"
(446.28mm)		 20.10"
(510.54mm)		 -2.53"
(-64.26mm)		 18th Driest
Driest since:
 1930
111th Wettest
Wettest since:
 2015
Ties: 1971
Mar–Aug 1899
6-Month 		22.56"
(573.02mm)		 23.91"
(607.31mm)		 -1.35"
(-34.29mm)		 37th Driest
Driest since:
 1930
92nd Wettest
Wettest since:
 2015
Feb–Aug 1899
7-Month 		25.84"
(656.34mm)		 26.58"
(675.13mm)		 -0.74"
(-18.79mm)		 47th Driest
Driest since:
 1930
82nd Wettest
Wettest since:
 2019
Jan–Aug 1899
8-Month 		29.24"
(742.70mm)		 29.63"
(752.60mm)		 -0.39"
(-9.90mm)		 55th Driest
Driest since:
 1936
74th Wettest
Wettest since:
 2019
Dec 1898–Aug 1899
9-Month 		31.44"
(798.58mm)		 32.72"
(831.09mm)		 -1.28"
(-32.51mm)		 36th Driest
Driest since:
 1936
92nd Wettest
Wettest since:
 2019
Nov 1898–Aug 1899
10-Month 		34.20"
(868.68mm)		 35.86"
(910.84mm)		 -1.66"
(-42.16mm)		 34th Driest
Driest since:
 1936
94th Wettest
Wettest since:
 2019
Ties: 1955, 2001
Oct 1898–Aug 1899
11-Month 		38.57"
(979.68mm)		 38.78"
(985.01mm)		 -0.21"
(-5.33mm)		 52nd Driest
Driest since:
 1936
76th Wettest
Wettest since:
 2019
Ties: 1992
Sep 1898–Aug 1899
12-Month 		43.21"
(1,097.53mm)		 42.24"
(1,072.90mm)		 0.97"
(24.63mm)		 64th Driest
Driest since:
 1936
64th Wettest
Wettest since:
 2019
Mar 1898–Aug 1899
18-Month 		71.28"
(1,810.51mm)		 66.13"
(1,679.70mm)		 5.15"
(130.81mm)		 95th Driest
Driest since:
 1931
33rd Wettest
Wettest to Date
 2019
Ties: 1982
Sep 1897–Aug 1899
24-Month 		88.20"
(2,240.28mm)		 84.47"
(2,145.54mm)		 3.73"
(94.74mm)		 79th Driest
Driest since:
 1941
48th Wettest
Wettest since:
 2020
Sep 1896–Aug 1899
36-Month 		132.16"
(3,356.86mm)		 126.74"
(3,219.20mm)		 5.42"
(137.66mm)		 85th Driest
Driest since:
 1941
41st Wettest
Wettest to Date
 2020
Sep 1895–Aug 1899
48-Month 		174.37"
(4,429.00mm)		 168.98"
(4,292.09mm)		 5.39"
(136.91mm)		 80th Driest
Driest since:
 1956
45th Wettest
Wettest to Date
 2022

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