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 1966

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 1966
1-Month
3.65"
(92.71mm)
3.47"
(88.14mm)
0.18"
(4.57mm)
82nd Driest
Driest since:
1897
47th Wettest
Wettest since:
1926
Ties: 2000
Aug–Sep 1966
2-Month
7.56"
(192.02mm)
7.14"
(181.36mm)
0.42"
(10.66mm)
84th Driest
Driest since:
1897
45th Wettest
Wettest since:
1926
Ties: 1932
Jul–Sep 1966
3-Month
11.04"
(280.42mm)
11.14"
(282.96mm)
-0.10"
(-2.54mm)
62nd Driest
Driest since:
1953
67th Wettest
Wettest since:
1926
Jun–Sep 1966
4-Month
13.39"
(340.11mm)
15.39"
(390.91mm)
-2.00"
(-50.80mm)
22nd Driest
Driest since:
1953
107th Wettest
Wettest since:
1915
Ties: 1914
May–Sep 1966
5-Month
17.17"
(436.12mm)
19.66"
(499.36mm)
-2.49"
(-63.24mm)
25th Driest
Driest since:
1930
104th Wettest
Wettest since:
1915
Apr–Sep 1966
6-Month
22.17"
(563.12mm)
23.57"
(598.68mm)
-1.40"
(-35.56mm)
38th Driest
Driest since:
1930
91st Wettest
Wettest since:
2011
Ties: 1985
Mar–Sep 1966
7-Month
23.80"
(604.52mm)
27.38"
(695.45mm)
-3.58"
(-90.93mm)
19th Driest
Driest since:
1930
110th Wettest
Wettest since:
1945
Feb–Sep 1966
8-Month
26.91"
(683.51mm)
30.05"
(763.27mm)
-3.14"
(-79.76mm)
25th Driest
Driest since:
1930
104th Wettest
Wettest since:
1945
Ties: 1952
Jan–Sep 1966
9-Month
29.72"
(754.89mm)
33.10"
(840.74mm)
-3.38"
(-85.85mm)
23rd Driest
Driest since:
1930
106th Wettest
Wettest since:
1950
Dec 1965–Sep 1966
10-Month
31.52"
(800.61mm)
36.19"
(919.23mm)
-4.67"
(-118.62mm)
15th Driest
Driest since:
1930
113th Wettest
Wettest since:
1950
Nov 1965–Sep 1966
11-Month
33.07"
(839.98mm)
39.33"
(998.98mm)
-6.26"
(-159.00mm)
14th Driest
Driest since:
1930
114th Wettest
Wettest since:
2019
Oct 1965–Sep 1966
12-Month
35.22"
(894.59mm)
42.25"
(1,073.15mm)
-7.03"
(-178.56mm)
12th Driest
Driest since:
1925
116th Wettest
Wettest since:
2019
Apr 1965–Sep 1966
18-Month
60.53"
(1,537.46mm)
65.79"
(1,671.07mm)
-5.26"
(-133.61mm)
19th Driest
Driest since:
1931
109th Wettest
Wettest since:
2019
Oct 1964–Sep 1966
24-Month
78.45"
(1,992.63mm)
84.47"
(2,145.54mm)
-6.02"
(-152.91mm)
22nd Driest
Driest since:
1941
105th Wettest
Wettest since:
2020
Oct 1963–Sep 1966
36-Month
116.17"
(2,950.72mm)
126.72"
(3,218.69mm)
-10.55"
(-267.97mm)
12th Driest
Driest since:
1941
114th Wettest
Wettest since:
2020
Oct 1962–Sep 1966
48-Month
150.78"
(3,829.81mm)
168.99"
(4,292.35mm)
-18.21"
(-462.54mm)
2nd Driest
Driest since:
1956
123rd Wettest
Wettest since:
2021
Oct 1961–Sep 1966
60-Month
193.30"
(4,909.82mm)
211.21"
(5,364.73mm)
-17.91"
(-454.91mm)
5th Driest
Driest since:
1956
119th Wettest
Wettest since:
2020

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