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 1917

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 1917
1-Month
2.56"
(65.02mm)
3.47"
(88.14mm)
-0.91"
(-23.12mm)
30th Driest
Driest since:
1897
99th Wettest
Wettest since:
1926
Aug–Sep 1917
2-Month
6.01"
(152.65mm)
7.14"
(181.36mm)
-1.13"
(-28.71mm)
30th Driest
Driest since:
1897
99th Wettest
Wettest since:
1926
Jul–Sep 1917
3-Month
10.07"
(255.78mm)
11.14"
(282.96mm)
-1.07"
(-27.18mm)
37th Driest
Driest since:
1953
92nd Wettest
Wettest since:
1926
Jun–Sep 1917
4-Month
14.77"
(375.16mm)
15.39"
(390.91mm)
-0.62"
(-15.75mm)
49th Driest
Driest since:
1953
80th Wettest
Wettest since:
1915
May–Sep 1917
5-Month
18.96"
(481.58mm)
19.66"
(499.36mm)
-0.70"
(-17.78mm)
48th Driest
Driest since:
1930
81st Wettest
Wettest since:
1915
Apr–Sep 1917
6-Month
23.50"
(596.90mm)
23.57"
(598.68mm)
-0.07"
(-1.78mm)
56th Driest
Driest since:
1930
73rd Wettest
Wettest since:
2011
Mar–Sep 1917
7-Month
28.35"
(720.09mm)
27.38"
(695.45mm)
0.97"
(24.64mm)
69th Driest
Driest since:
1930
60th Wettest
Wettest since:
1945
Feb–Sep 1917
8-Month
30.01"
(762.25mm)
30.05"
(763.27mm)
-0.04"
(-1.02mm)
54th Driest
Driest since:
1930
75th Wettest
Wettest since:
1945
Ties: 1904
Jan–Sep 1917
9-Month
33.66"
(854.96mm)
33.10"
(840.74mm)
0.56"
(14.22mm)
65th Driest
Driest since:
1930
64th Wettest
Wettest since:
1950
Dec 1916–Sep 1917
10-Month
36.77"
(933.96mm)
36.19"
(919.23mm)
0.58"
(14.73mm)
65th Driest
Driest since:
1930
63rd Wettest
Wettest since:
1950
Nov 1916–Sep 1917
11-Month
38.77"
(984.76mm)
39.33"
(998.98mm)
-0.56"
(-14.22mm)
49th Driest
Driest since:
1930
79th Wettest
Wettest since:
2019
Oct 1916–Sep 1917
12-Month
41.20"
(1,046.48mm)
42.25"
(1,073.15mm)
-1.05"
(-26.67mm)
46th Driest
Driest since:
1925
82nd Wettest
Wettest since:
2019
Apr 1916–Sep 1917
18-Month
63.84"
(1,621.54mm)
65.79"
(1,671.07mm)
-1.95"
(-49.53mm)
35th Driest
Driest since:
1931
93rd Wettest
Wettest since:
2019
Oct 1915–Sep 1917
24-Month
85.58"
(2,173.73mm)
84.47"
(2,145.54mm)
1.11"
(28.19mm)
61st Driest
Driest since:
1941
66th Wettest
Wettest since:
2020
Oct 1914–Sep 1917
36-Month
131.03"
(3,328.16mm)
126.72"
(3,218.69mm)
4.31"
(109.47mm)
77th Driest
Driest since:
1941
49th Wettest
Wettest since:
2020
Oct 1913–Sep 1917
48-Month
167.00"
(4,241.80mm)
168.99"
(4,292.35mm)
-1.99"
(-50.55mm)
46th Driest
Driest since:
1956
79th Wettest
Wettest since:
2021
Oct 1912–Sep 1917
60-Month
207.09"
(5,260.09mm)
211.21"
(5,364.73mm)
-4.12"
(-104.64mm)
33rd Driest
Driest since:
1956
91st Wettest
Wettest since:
2020

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