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 2019

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
August 2019
1-Month 		4.30"
(109.22mm)		 3.67"
(93.22mm)		 0.63"
(16.00mm)		 97th Driest
Driest since:
 1953
32nd Wettest
Wettest since:
 1915
Jul–Aug 2019
2-Month 		8.74"
(222.00mm)		 7.67"
(194.82mm)		 1.07"
(27.18mm)		 101st Driest
Driest since:
 1930
28th Wettest
Wettest since:
 1915
Jun–Aug 2019
3-Month 		14.90"
(378.46mm)		 11.92"
(302.77mm)		 2.98"
(75.69mm)		 121st Driest
Driest since:
 1930
8th Wettest
Wettest since:
 1958
May–Aug 2019
4-Month 		21.56"
(547.62mm)		 16.19"
(411.23mm)		 5.37"
(136.39mm)		 126th Driest
Driest since:
 1936
3rd Wettest
Wettest since:
 1915
Apr–Aug 2019
5-Month 		26.14"
(663.96mm)		 20.10"
(510.54mm)		 6.04"
(153.42mm)		 127th Driest
Driest since:
 1930
2nd Wettest
Wettest since:
 2015
Mar–Aug 2019
6-Month 		30.04"
(763.02mm)		 23.91"
(607.31mm)		 6.13"
(155.71mm)		 124th Driest
Driest since:
 1930
5th Wettest
Wettest since:
 2015
Feb–Aug 2019
7-Month 		35.85"
(910.59mm)		 26.58"
(675.13mm)		 9.27"
(235.46mm)		 128th Driest
Driest since:
 1930
1st Wettest
Wettest to Date
 2019
Jan–Aug 2019
8-Month 		39.70"
(1,008.38mm)		 29.63"
(752.60mm)		 10.07"
(255.78mm)		 128th Driest
Driest since:
 1936
1st Wettest
Wettest to Date
 2019
Dec 2018–Aug 2019
9-Month 		44.06"
(1,119.12mm)		 32.72"
(831.09mm)		 11.34"
(288.03mm)		 127th Driest
Driest since:
 1936
1st Wettest
Wettest to Date
 2019
Nov 2018–Aug 2019
10-Month 		48.29"
(1,226.57mm)		 35.86"
(910.84mm)		 12.43"
(315.73mm)		 127th Driest
Driest since:
 1936
1st Wettest
Wettest to Date
 2019
Oct 2018–Aug 2019
11-Month 		51.90"
(1,318.26mm)		 38.78"
(985.01mm)		 13.12"
(333.25mm)		 127th Driest
Driest since:
 1936
1st Wettest
Wettest to Date
 2019
Sep 2018–Aug 2019
12-Month 		57.82"
(1,468.63mm)		 42.24"
(1,072.90mm)		 15.58"
(395.73mm)		 127th Driest
Driest since:
 1936
1st Wettest
Wettest to Date
 2019
Mar 2018–Aug 2019
18-Month 		84.15"
(2,137.41mm)		 66.13"
(1,679.70mm)		 18.02"
(457.71mm)		 127th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
Sep 2017–Aug 2019
24-Month 		104.01"
(2,641.85mm)		 84.47"
(2,145.54mm)		 19.54"
(496.31mm)		 125th Driest
Driest since:
 1941
2nd Wettest
Wettest to Date
 2020
Sep 2016–Aug 2019
36-Month 		148.99"
(3,784.35mm)		 126.74"
(3,219.20mm)		 22.25"
(565.15mm)		 122nd Driest
Driest since:
 1941
4th Wettest
Wettest since:
 2020
Sep 2015–Aug 2019
48-Month 		197.51"
(5,016.75mm)		 168.98"
(4,292.09mm)		 28.53"
(724.66mm)		 121st Driest
Driest since:
 1956
4th Wettest
Wettest to Date
 2022
Sep 2014–Aug 2019
60-Month 		245.85"
(6,244.59mm)		 211.19"
(5,364.23mm)		 34.66"
(880.36mm)		 121st Driest
Driest since:
 1934
3rd Wettest
Wettest to Date
 2020

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