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 1940

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1940
1-Month 		1.23"
(31.24mm)		 3.47"
(88.14mm)		 -2.24"
(-56.90mm)		 3rd Driest
Driest since:
 1897
126th Wettest
Wettest since:
 1926
Aug–Sep 1940
2-Month 		5.67"
(144.02mm)		 7.14"
(181.36mm)		 -1.47"
(-37.34mm)		 20th Driest
Driest since:
 1897
109th Wettest
Wettest since:
 1926
Ties: 1943
Jul–Sep 1940
3-Month 		7.99"
(202.95mm)		 11.14"
(282.96mm)		 -3.15"
(-80.01mm)		 6th Driest
Driest since:
 1953
123rd Wettest
Wettest since:
 1926
Jun–Sep 1940
4-Month 		12.12"
(307.85mm)		 15.39"
(390.91mm)		 -3.27"
(-83.06mm)		 10th Driest
Driest since:
 1953
119th Wettest
Wettest since:
 1915
May–Sep 1940
5-Month 		15.60"
(396.24mm)		 19.66"
(499.36mm)		 -4.06"
(-103.12mm)		 10th Driest
Driest since:
 1930
119th Wettest
Wettest since:
 1915
Apr–Sep 1940
6-Month 		20.30"
(515.62mm)		 23.57"
(598.68mm)		 -3.27"
(-83.06mm)		 19th Driest
Driest since:
 1930
110th Wettest
Wettest since:
 2011
Mar–Sep 1940
7-Month 		23.54"
(597.92mm)		 27.38"
(695.45mm)		 -3.84"
(-97.53mm)		 16th Driest
Driest since:
 1930
113th Wettest
Wettest since:
 1945
Feb–Sep 1940
8-Month 		26.48"
(672.59mm)		 30.05"
(763.27mm)		 -3.57"
(-90.68mm)		 20th Driest
Driest since:
 1930
109th Wettest
Wettest since:
 1945
Jan–Sep 1940
9-Month 		28.05"
(712.47mm)		 33.10"
(840.74mm)		 -5.05"
(-128.27mm)		 13th Driest
Driest since:
 1930
116th Wettest
Wettest since:
 1950
Dec 1939–Sep 1940
10-Month 		29.87"
(758.70mm)		 36.19"
(919.23mm)		 -6.32"
(-160.53mm)		 7th Driest
Driest since:
 1930
121st Wettest
Wettest since:
 1950
Nov 1939–Sep 1940
11-Month 		31.45"
(798.83mm)		 39.33"
(998.98mm)		 -7.88"
(-200.15mm)		 4th Driest
Driest since:
 1930
124th Wettest
Wettest since:
 2019
Oct 1939–Sep 1940
12-Month 		33.66"
(854.96mm)		 42.25"
(1,073.15mm)		 -8.59"
(-218.19mm)		 4th Driest
Driest since:
 1925
124th Wettest
Wettest since:
 2019
Apr 1939–Sep 1940
18-Month 		56.01"
(1,422.65mm)		 65.79"
(1,671.07mm)		 -9.78"
(-248.42mm)		 8th Driest
Driest since:
 1931
120th Wettest
Wettest since:
 2019
Oct 1938–Sep 1940
24-Month 		75.45"
(1,916.43mm)		 84.47"
(2,145.54mm)		 -9.02"
(-229.11mm)		 7th Driest
Driest since:
 1941
120th Wettest
Wettest since:
 2020
Oct 1937–Sep 1940
36-Month 		120.43"
(3,058.92mm)		 126.72"
(3,218.69mm)		 -6.29"
(-159.77mm)		 22nd Driest
Driest since:
 1941
104th Wettest
Wettest since:
 2020
Oct 1936–Sep 1940
48-Month 		166.14"
(4,219.96mm)		 168.99"
(4,292.35mm)		 -2.85"
(-72.39mm)		 40th Driest
Driest since:
 1956
85th Wettest
Wettest since:
 2021
Oct 1935–Sep 1940
60-Month 		199.70"
(5,072.38mm)		 211.21"
(5,364.73mm)		 -11.51"
(-292.35mm)		 17th Driest
Driest since:
 1956
107th Wettest
Wettest since:
 2020

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