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 1897

View Period (Months):
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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 1897
1-Month
0.70"
(17.78mm)
3.47"
(88.14mm)
-2.77"
(-70.36mm)
1st Driest
Driest since:
1897
128th Wettest
Wettest since:
1926
Aug–Sep 1897
2-Month
3.01"
(76.45mm)
7.14"
(181.36mm)
-4.13"
(-104.91mm)
1st Driest
Driest since:
1897
128th Wettest
Wettest since:
1926
Jul–Sep 1897
3-Month
7.11"
(180.59mm)
11.14"
(282.96mm)
-4.03"
(-102.37mm)
4th Driest
Driest since:
1953
125th Wettest
Wettest since:
1926
Jun–Sep 1897
4-Month
11.44"
(290.58mm)
15.39"
(390.91mm)
-3.95"
(-100.33mm)
5th Driest
Driest since:
1953
124th Wettest
Wettest since:
1915
May–Sep 1897
5-Month
14.47"
(367.54mm)
19.66"
(499.36mm)
-5.19"
(-131.82mm)
4th Driest
Driest since:
1930
125th Wettest
Wettest since:
1915
Apr–Sep 1897
6-Month
19.13"
(485.90mm)
23.57"
(598.68mm)
-4.44"
(-112.78mm)
9th Driest
Driest since:
1930
120th Wettest
Wettest since:
2011
Mar–Sep 1897
7-Month
25.99"
(660.15mm)
27.38"
(695.45mm)
-1.39"
(-35.30mm)
39th Driest
Driest since:
1930
90th Wettest
Wettest since:
1945
Feb–Sep 1897
8-Month
29.77"
(756.16mm)
30.05"
(763.27mm)
-0.28"
(-7.11mm)
51st Driest
Driest since:
1930
78th Wettest
Wettest since:
1945
Jan–Sep 1897
9-Month
33.62"
(853.95mm)
33.10"
(840.74mm)
0.52"
(13.21mm)
62nd Driest
Driest since:
1930
67th Wettest
Wettest since:
1950
Ties: 2006
Dec 1896–Sep 1897
10-Month
34.80"
(883.92mm)
36.19"
(919.23mm)
-1.39"
(-35.31mm)
37th Driest
Driest since:
1930
91st Wettest
Wettest since:
1950
Nov 1896–Sep 1897
11-Month
38.39"
(975.11mm)
39.33"
(998.98mm)
-0.94"
(-23.87mm)
42nd Driest
Driest since:
1930
86th Wettest
Wettest since:
2019
Oct 1896–Sep 1897
12-Month
40.16"
(1,020.06mm)
42.25"
(1,073.15mm)
-2.09"
(-53.09mm)
33rd Driest
Driest since:
1925
95th Wettest
Wettest since:
2019
Apr 1896–Sep 1897
18-Month
67.34"
(1,710.44mm)
65.79"
(1,671.07mm)
1.55"
(39.37mm)
70th Driest
Driest since:
1931
58th Wettest
Wettest to Date
2019
Oct 1895–Sep 1897
24-Month
84.56"
(2,147.82mm)
84.47"
(2,145.54mm)
0.09"
(2.28mm)
53rd Driest
Driest since:
1941
74th Wettest
Wettest to Date
2020

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