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 1977

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 1977
1-Month
5.13"
(130.30mm)
3.47"
(88.14mm)
1.66"
(42.16mm)
114th Driest
Driest since:
1897
15th Wettest
Wettest since:
1926
Aug–Sep 1977
2-Month
10.91"
(277.11mm)
7.14"
(181.36mm)
3.77"
(95.75mm)
126th Driest
Driest since:
1897
3rd Wettest
Wettest since:
1926
Jul–Sep 1977
3-Month
14.63"
(371.60mm)
11.14"
(282.96mm)
3.49"
(88.64mm)
120th Driest
Driest since:
1953
9th Wettest
Wettest since:
1926
Ties: 1992
Jun–Sep 1977
4-Month
19.27"
(489.46mm)
15.39"
(390.91mm)
3.88"
(98.55mm)
121st Driest
Driest since:
1953
8th Wettest
Wettest since:
1915
May–Sep 1977
5-Month
22.06"
(560.32mm)
19.66"
(499.36mm)
2.40"
(60.96mm)
99th Driest
Driest since:
1930
30th Wettest
Wettest since:
1915
Ties: 1998
Apr–Sep 1977
6-Month
25.75"
(654.05mm)
23.57"
(598.68mm)
2.18"
(55.37mm)
87th Driest
Driest since:
1930
42nd Wettest
Wettest since:
2011
Ties: 1926
Mar–Sep 1977
7-Month
30.69"
(779.53mm)
27.38"
(695.45mm)
3.31"
(84.08mm)
100th Driest
Driest since:
1930
29th Wettest
Wettest since:
1945
Ties: 1975
Feb–Sep 1977
8-Month
32.26"
(819.40mm)
30.05"
(763.27mm)
2.21"
(56.13mm)
87th Driest
Driest since:
1930
42nd Wettest
Wettest since:
1945
Jan–Sep 1977
9-Month
33.89"
(860.81mm)
33.10"
(840.74mm)
0.79"
(20.07mm)
67th Driest
Driest since:
1930
62nd Wettest
Wettest since:
1950
Dec 1976–Sep 1977
10-Month
35.07"
(890.78mm)
36.19"
(919.23mm)
-1.12"
(-28.45mm)
39th Driest
Driest since:
1930
89th Wettest
Wettest since:
1950
Nov 1976–Sep 1977
11-Month
35.96"
(913.38mm)
39.33"
(998.98mm)
-3.37"
(-85.60mm)
26th Driest
Driest since:
1930
102nd Wettest
Wettest since:
2019
Oct 1976–Sep 1977
12-Month
40.05"
(1,017.27mm)
42.25"
(1,073.15mm)
-2.20"
(-55.88mm)
31st Driest
Driest since:
1925
97th Wettest
Wettest since:
2019
Apr 1976–Sep 1977
18-Month
59.62"
(1,514.35mm)
65.79"
(1,671.07mm)
-6.17"
(-156.72mm)
15th Driest
Driest since:
1931
113th Wettest
Wettest since:
2019
Oct 1975–Sep 1977
24-Month
78.24"
(1,987.30mm)
84.47"
(2,145.54mm)
-6.23"
(-158.24mm)
19th Driest
Driest since:
1941
108th Wettest
Wettest since:
2020
Ties: 1932
Oct 1974–Sep 1977
36-Month
125.35"
(3,183.89mm)
126.72"
(3,218.69mm)
-1.37"
(-34.80mm)
46th Driest
Driest since:
1941
80th Wettest
Wettest since:
2020
Oct 1973–Sep 1977
48-Month
175.92"
(4,468.37mm)
168.99"
(4,292.35mm)
6.93"
(176.02mm)
87th Driest
Driest since:
1956
38th Wettest
Wettest since:
2021
Oct 1972–Sep 1977
60-Month
227.84"
(5,787.14mm)
211.21"
(5,364.73mm)
16.63"
(422.41mm)
107th Driest
Driest since:
1956
17th Wettest
Wettest since:
2020

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