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 2015

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 2015
1-Month 		3.31"
(84.07mm)		 3.67"
(93.22mm)		 -0.36"
(-9.15mm)		 46th Driest
Driest since:
 1953
83rd Wettest
Wettest since:
 1915
Jul–Aug 2015
2-Month 		10.00"
(254.00mm)		 7.67"
(194.82mm)		 2.33"
(59.18mm)		 122nd Driest
Driest since:
 1930
7th Wettest
Wettest since:
 1915
Jun–Aug 2015
3-Month 		17.36"
(440.94mm)		 11.92"
(302.77mm)		 5.44"
(138.17mm)		 127th Driest
Driest since:
 1930
2nd Wettest
Wettest since:
 1958
May–Aug 2015
4-Month 		21.92"
(556.77mm)		 16.19"
(411.23mm)		 5.73"
(145.54mm)		 127th Driest
Driest since:
 1936
2nd Wettest
Wettest since:
 1915
Apr–Aug 2015
5-Month 		26.88"
(682.75mm)		 20.10"
(510.54mm)		 6.78"
(172.21mm)		 128th Driest
Driest since:
 1930
1st Wettest
Wettest to Date
 2015
Mar–Aug 2015
6-Month 		30.89"
(784.61mm)		 23.91"
(607.31mm)		 6.98"
(177.30mm)		 128th Driest
Driest since:
 1930
1st Wettest
Wettest to Date
 2015
Feb–Aug 2015
7-Month 		33.15"
(842.01mm)		 26.58"
(675.13mm)		 6.57"
(166.88mm)		 125th Driest
Driest since:
 1930
4th Wettest
Wettest since:
 2019
Jan–Aug 2015
8-Month 		35.09"
(891.29mm)		 29.63"
(752.60mm)		 5.46"
(138.69mm)		 115th Driest
Driest since:
 1936
14th Wettest
Wettest since:
 2019
Dec 2014–Aug 2015
9-Month 		37.88"
(962.15mm)		 32.72"
(831.09mm)		 5.16"
(131.06mm)		 114th Driest
Driest since:
 1936
14th Wettest
Wettest since:
 2019
Nov 2014–Aug 2015
10-Month 		40.11"
(1,018.79mm)		 35.86"
(910.84mm)		 4.25"
(107.95mm)		 103rd Driest
Driest since:
 1936
25th Wettest
Wettest since:
 2019
Oct 2014–Aug 2015
11-Month 		45.27"
(1,149.86mm)		 38.78"
(985.01mm)		 6.49"
(164.85mm)		 118th Driest
Driest since:
 1936
10th Wettest
Wettest since:
 2019
Sep 2014–Aug 2015
12-Month 		48.34"
(1,227.84mm)		 42.24"
(1,072.90mm)		 6.10"
(154.94mm)		 112th Driest
Driest since:
 1936
16th Wettest
Wettest since:
 2019
Ties: 1907
Mar 2014–Aug 2015
18-Month 		73.47"
(1,866.14mm)		 66.13"
(1,679.70mm)		 7.34"
(186.44mm)		 107th Driest
Driest since:
 1931
21st Wettest
Wettest since:
 2019
Sep 2013–Aug 2015
24-Month 		91.60"
(2,326.64mm)		 84.47"
(2,145.54mm)		 7.13"
(181.10mm)		 97th Driest
Driest since:
 1941
30th Wettest
Wettest since:
 2020
Sep 2012–Aug 2015
36-Month 		140.71"
(3,574.03mm)		 126.74"
(3,219.20mm)		 13.97"
(354.83mm)		 113th Driest
Driest since:
 1941
13th Wettest
Wettest since:
 2020
Sep 2011–Aug 2015
48-Month 		181.38"
(4,607.05mm)		 168.98"
(4,292.09mm)		 12.40"
(314.96mm)		 101st Driest
Driest since:
 1956
24th Wettest
Wettest since:
 2022
Sep 2010–Aug 2015
60-Month 		228.43"
(5,802.12mm)		 211.19"
(5,364.23mm)		 17.24"
(437.89mm)		 108th Driest
Driest since:
 1934
16th Wettest
Wettest since:
 2020

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