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, September 2017

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
September 2017
1-Month		2.17"
(55.12mm)		3.47"
(88.14mm)		-1.30"
(-33.02mm)		15th Driest
Driest since:
1897
114th Wettest
Wettest since:
1926
Aug–Sep 2017
2-Month		5.83"
(148.08mm)		7.14"
(181.36mm)		-1.31"
(-33.28mm)		24th Driest
Driest since:
1897
105th Wettest
Wettest since:
1926
Jul–Sep 2017
3-Month		10.82"
(274.83mm)		11.14"
(282.96mm)		-0.32"
(-8.13mm)		53rd Driest
Driest since:
1953
76th Wettest
Wettest since:
1926
Ties: 1985
Jun–Sep 2017
4-Month		15.10"
(383.54mm)		15.39"
(390.91mm)		-0.29"
(-7.37mm)		54th Driest
Driest since:
1953
75th Wettest
Wettest since:
1915
May–Sep 2017
5-Month		20.97"
(532.64mm)		19.66"
(499.36mm)		1.31"
(33.28mm)		77th Driest
Driest since:
1930
52nd Wettest
Wettest since:
1915
Apr–Sep 2017
6-Month		27.29"
(693.17mm)		23.57"
(598.68mm)		3.72"
(94.49mm)		110th Driest
Driest since:
1930
19th Wettest
Wettest since:
2011
Mar–Sep 2017
7-Month		31.60"
(802.64mm)		27.38"
(695.45mm)		4.22"
(107.19mm)		110th Driest
Driest since:
1930
19th Wettest
Wettest since:
1945
Feb–Sep 2017
8-Month		33.01"
(838.45mm)		30.05"
(763.27mm)		2.96"
(75.18mm)		94th Driest
Driest since:
1930
35th Wettest
Wettest since:
1945
Jan–Sep 2017
9-Month		36.28"
(921.51mm)		33.10"
(840.74mm)		3.18"
(80.77mm)		96th Driest
Driest since:
1930
33rd Wettest
Wettest since:
1950
Ties: 1949
Dec 2016–Sep 2017
10-Month		39.61"
(1,006.09mm)		36.19"
(919.23mm)		3.42"
(86.86mm)		94th Driest
Driest since:
1930
34th Wettest
Wettest since:
1950
Nov 2016–Sep 2017
11-Month		41.72"
(1,059.69mm)		39.33"
(998.98mm)		2.39"
(60.71mm)		87th Driest
Driest since:
1930
41st Wettest
Wettest since:
2019
Oct 2016–Sep 2017
12-Month		43.87"
(1,114.30mm)		42.25"
(1,073.15mm)		1.62"
(41.15mm)		71st Driest
Driest since:
1925
57th Wettest
Wettest since:
2019
Apr 2016–Sep 2017
18-Month		70.50"
(1,790.70mm)		65.79"
(1,671.07mm)		4.71"
(119.63mm)		90th Driest
Driest since:
1931
38th Wettest
Wettest since:
2019
Oct 2015–Sep 2017
24-Month		92.81"
(2,357.37mm)		84.47"
(2,145.54mm)		8.34"
(211.83mm)		107th Driest
Driest since:
1941
20th Wettest
Wettest since:
2020
Oct 2014–Sep 2017
36-Month		140.94"
(3,579.88mm)		126.72"
(3,218.69mm)		14.22"
(361.19mm)		112th Driest
Driest since:
1941
14th Wettest
Wettest since:
2020
Oct 2013–Sep 2017
48-Month		184.53"
(4,687.06mm)		168.99"
(4,292.35mm)		15.54"
(394.71mm)		111th Driest
Driest since:
1956
14th Wettest
Wettest since:
2021
Oct 2012–Sep 2017
60-Month		231.12"
(5,870.45mm)		211.21"
(5,364.73mm)		19.91"
(505.72mm)		115th Driest
Driest since:
1956
9th Wettest
Wettest since:
2020

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