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 1918

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
September 1918
1-Month		3.85"
(97.79mm)		3.47"
(88.14mm)		0.38"
(9.65mm)		88th Driest
Driest since:
1897
41st Wettest
Wettest since:
1926
Aug–Sep 1918
2-Month		7.29"
(185.17mm)		7.14"
(181.36mm)		0.15"
(3.81mm)		75th Driest
Driest since:
1897
54th Wettest
Wettest since:
1926
Jul–Sep 1918
3-Month		10.05"
(255.27mm)		11.14"
(282.96mm)		-1.09"
(-27.69mm)		35th Driest
Driest since:
1953
94th Wettest
Wettest since:
1926
Ties: 1903
Jun–Sep 1918
4-Month		13.65"
(346.71mm)		15.39"
(390.91mm)		-1.74"
(-44.20mm)		29th Driest
Driest since:
1953
100th Wettest
Wettest since:
1915
Ties: 1959
May–Sep 1918
5-Month		18.37"
(466.60mm)		19.66"
(499.36mm)		-1.29"
(-32.76mm)		41st Driest
Driest since:
1930
88th Wettest
Wettest since:
1915
Apr–Sep 1918
6-Month		23.20"
(589.28mm)		23.57"
(598.68mm)		-0.37"
(-9.40mm)		52nd Driest
Driest since:
1930
77th Wettest
Wettest since:
2011
Ties: 1984
Mar–Sep 1918
7-Month		25.04"
(636.02mm)		27.38"
(695.45mm)		-2.34"
(-59.43mm)		33rd Driest
Driest since:
1930
96th Wettest
Wettest since:
1945
Feb–Sep 1918
8-Month		26.87"
(682.50mm)		30.05"
(763.27mm)		-3.18"
(-80.77mm)		24th Driest
Driest since:
1930
105th Wettest
Wettest since:
1945
Jan–Sep 1918
9-Month		30.48"
(774.19mm)		33.10"
(840.74mm)		-2.62"
(-66.55mm)		28th Driest
Driest since:
1930
101st Wettest
Wettest since:
1950
Dec 1917–Sep 1918
10-Month		31.77"
(806.96mm)		36.19"
(919.23mm)		-4.42"
(-112.27mm)		16th Driest
Driest since:
1930
112th Wettest
Wettest since:
1950
Nov 1917–Sep 1918
11-Month		32.66"
(829.56mm)		39.33"
(998.98mm)		-6.67"
(-169.42mm)		10th Driest
Driest since:
1930
118th Wettest
Wettest since:
2019
Oct 1917–Sep 1918
12-Month		35.73"
(907.54mm)		42.25"
(1,073.15mm)		-6.52"
(-165.61mm)		14th Driest
Driest since:
1925
114th Wettest
Wettest since:
2019
Apr 1917–Sep 1918
18-Month		59.23"
(1,504.44mm)		65.79"
(1,671.07mm)		-6.56"
(-166.63mm)		14th Driest
Driest since:
1931
114th Wettest
Wettest since:
2019
Oct 1916–Sep 1918
24-Month		76.93"
(1,954.02mm)		84.47"
(2,145.54mm)		-7.54"
(-191.52mm)		15th Driest
Driest since:
1941
112th Wettest
Wettest since:
2020
Oct 1915–Sep 1918
36-Month		121.31"
(3,081.27mm)		126.72"
(3,218.69mm)		-5.41"
(-137.42mm)		25th Driest
Driest since:
1941
101st Wettest
Wettest since:
2020
Oct 1914–Sep 1918
48-Month		166.76"
(4,235.70mm)		168.99"
(4,292.35mm)		-2.23"
(-56.65mm)		44th Driest
Driest since:
1956
81st Wettest
Wettest since:
2021
Oct 1913–Sep 1918
60-Month		202.73"
(5,149.34mm)		211.21"
(5,364.73mm)		-8.48"
(-215.39mm)		19th Driest
Driest since:
1956
105th Wettest
Wettest since:
2020

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