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, September 1956

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
September 1956
1-Month 		1.75"
(44.45mm)		 3.47"
(88.14mm)		 -1.72"
(-43.69mm)		 7th Driest
Driest since:
 1897
122nd Wettest
Wettest since:
 1926
Aug–Sep 1956
2-Month 		5.25"
(133.35mm)		 7.14"
(181.36mm)		 -1.89"
(-48.01mm)		 12th Driest
Driest since:
 1897
117th Wettest
Wettest since:
 1926
Jul–Sep 1956
3-Month 		10.23"
(259.84mm)		 11.14"
(282.96mm)		 -0.91"
(-23.12mm)		 38th Driest
Driest since:
 1953
91st Wettest
Wettest since:
 1926
Jun–Sep 1956
4-Month 		13.66"
(346.96mm)		 15.39"
(390.91mm)		 -1.73"
(-43.95mm)		 31st Driest
Driest since:
 1953
98th Wettest
Wettest since:
 1915
May–Sep 1956
5-Month 		18.11"
(459.99mm)		 19.66"
(499.36mm)		 -1.55"
(-39.37mm)		 36th Driest
Driest since:
 1930
93rd Wettest
Wettest since:
 1915
Apr–Sep 1956
6-Month 		22.04"
(559.82mm)		 23.57"
(598.68mm)		 -1.53"
(-38.86mm)		 35th Driest
Driest since:
 1930
94th Wettest
Wettest since:
 2011
Mar–Sep 1956
7-Month 		24.95"
(633.73mm)		 27.38"
(695.45mm)		 -2.43"
(-61.72mm)		 31st Driest
Driest since:
 1930
98th Wettest
Wettest since:
 1945
Feb–Sep 1956
8-Month 		30.18"
(766.57mm)		 30.05"
(763.27mm)		 0.13"
(3.30mm)		 56th Driest
Driest since:
 1930
73rd Wettest
Wettest since:
 1945
Jan–Sep 1956
9-Month 		32.29"
(820.17mm)		 33.10"
(840.74mm)		 -0.81"
(-20.57mm)		 47th Driest
Driest since:
 1930
82nd Wettest
Wettest since:
 1950
Dec 1955–Sep 1956
10-Month 		33.22"
(843.79mm)		 36.19"
(919.23mm)		 -2.97"
(-75.44mm)		 25th Driest
Driest since:
 1930
103rd Wettest
Wettest since:
 1950
Nov 1955–Sep 1956
11-Month 		35.73"
(907.54mm)		 39.33"
(998.98mm)		 -3.60"
(-91.44mm)		 24th Driest
Driest since:
 1930
104th Wettest
Wettest since:
 2019
Oct 1955–Sep 1956
12-Month 		39.31"
(998.47mm)		 42.25"
(1,073.15mm)		 -2.94"
(-74.68mm)		 27th Driest
Driest since:
 1925
101st Wettest
Wettest since:
 2019
Apr 1955–Sep 1956
18-Month 		60.60"
(1,539.24mm)		 65.79"
(1,671.07mm)		 -5.19"
(-131.83mm)		 20th Driest
Driest since:
 1931
108th Wettest
Wettest since:
 2019
Oct 1954–Sep 1956
24-Month 		81.36"
(2,066.54mm)		 84.47"
(2,145.54mm)		 -3.11"
(-79.00mm)		 35th Driest
Driest since:
 1941
92nd Wettest
Wettest since:
 2020
Ties: 1944
Oct 1953–Sep 1956
36-Month 		115.06"
(2,922.52mm)		 126.72"
(3,218.69mm)		 -11.66"
(-296.17mm)		 10th Driest
Driest since:
 1941
116th Wettest
Wettest since:
 2020
Oct 1952–Sep 1956
48-Month 		148.96"
(3,783.58mm)		 168.99"
(4,292.35mm)		 -20.03"
(-508.77mm)		 1st Driest
Driest since:
 1956
124th Wettest
Wettest since:
 2021
Oct 1951–Sep 1956
60-Month 		191.30"
(4,859.02mm)		 211.21"
(5,364.73mm)		 -19.91"
(-505.71mm)		 1st Driest
Driest since:
 1956
123rd Wettest
Wettest since:
 2020

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