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, August 2009

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
August 2009
1-Month		3.95"
(100.33mm)		3.67"
(93.22mm)		0.28"
(7.11mm)		82nd Driest
Driest since:
1953
47th Wettest
Wettest since:
1915
Jul–Aug 2009
2-Month		9.06"
(230.12mm)		7.67"
(194.82mm)		1.39"
(35.30mm)		106th Driest
Driest since:
1930
23rd Wettest
Wettest since:
1915
Jun–Aug 2009
3-Month		13.95"
(354.33mm)		11.92"
(302.77mm)		2.03"
(51.56mm)		109th Driest
Driest since:
1930
20th Wettest
Wettest since:
1958
May–Aug 2009
4-Month		19.99"
(507.75mm)		16.19"
(411.23mm)		3.80"
(96.52mm)		118th Driest
Driest since:
1936
11th Wettest
Wettest since:
1915
Apr–Aug 2009
5-Month		25.00"
(635.00mm)		20.10"
(510.54mm)		4.90"
(124.46mm)		120th Driest
Driest since:
1930
9th Wettest
Wettest since:
2015
Mar–Aug 2009
6-Month		28.58"
(725.93mm)		23.91"
(607.31mm)		4.67"
(118.62mm)		118th Driest
Driest since:
1930
11th Wettest
Wettest since:
2015
Feb–Aug 2009
7-Month		30.84"
(783.34mm)		26.58"
(675.13mm)		4.26"
(108.21mm)		112th Driest
Driest since:
1930
17th Wettest
Wettest since:
2019
Ties: 2017
Jan–Aug 2009
8-Month		33.31"
(846.07mm)		29.63"
(752.60mm)		3.68"
(93.47mm)		103rd Driest
Driest since:
1936
26th Wettest
Wettest since:
2019
Ties: 2022
Dec 2008–Aug 2009
9-Month		38.30"
(972.82mm)		32.72"
(831.09mm)		5.58"
(141.73mm)		117th Driest
Driest since:
1936
11th Wettest
Wettest since:
2019
Nov 2008–Aug 2009
10-Month		40.41"
(1,026.41mm)		35.86"
(910.84mm)		4.55"
(115.57mm)		106th Driest
Driest since:
1936
22nd Wettest
Wettest since:
2019
Oct 2008–Aug 2009
11-Month		42.78"
(1,086.61mm)		38.78"
(985.01mm)		4.00"
(101.60mm)		97th Driest
Driest since:
1936
31st Wettest
Wettest since:
2019
Sep 2008–Aug 2009
12-Month		47.21"
(1,199.13mm)		42.24"
(1,072.90mm)		4.97"
(126.23mm)		104th Driest
Driest since:
1936
24th Wettest
Wettest since:
2019
Mar 2008–Aug 2009
18-Month		76.06"
(1,931.92mm)		66.13"
(1,679.70mm)		9.93"
(252.22mm)		119th Driest
Driest since:
1931
9th Wettest
Wettest since:
2019
Sep 2007–Aug 2009
24-Month		96.72"
(2,456.69mm)		84.47"
(2,145.54mm)		12.25"
(311.15mm)		118th Driest
Driest since:
1941
9th Wettest
Wettest since:
2020
Sep 2006–Aug 2009
36-Month		138.32"
(3,513.33mm)		126.74"
(3,219.20mm)		11.58"
(294.13mm)		104th Driest
Driest since:
1941
22nd Wettest
Wettest since:
2020
Sep 2005–Aug 2009
48-Month		177.43"
(4,506.72mm)		168.98"
(4,292.09mm)		8.45"
(214.63mm)		92nd Driest
Driest since:
1956
33rd Wettest
Wettest since:
2022
Sep 2004–Aug 2009
60-Month		221.32"
(5,621.53mm)		211.20"
(5,364.48mm)		10.12"
(257.05mm)		90th Driest
Driest since:
1934
34th Wettest
Wettest since:
2020

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