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 1930

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 1930
1-Month
3.31"
(84.07mm)
3.47"
(88.14mm)
-0.16"
(-4.07mm)
64th Driest
Driest since:
1897
65th Wettest
Wettest since:
1926
Ties: 1964
Aug–Sep 1930
2-Month
5.51"
(139.95mm)
7.14"
(181.36mm)
-1.63"
(-41.41mm)
15th Driest
Driest since:
1897
114th Wettest
Wettest since:
1926
Jul–Sep 1930
3-Month
6.97"
(177.04mm)
11.14"
(282.96mm)
-4.17"
(-105.92mm)
3rd Driest
Driest since:
1953
126th Wettest
Wettest since:
1926
Jun–Sep 1930
4-Month
9.67"
(245.62mm)
15.39"
(390.91mm)
-5.72"
(-145.29mm)
2nd Driest
Driest since:
1953
127th Wettest
Wettest since:
1915
May–Sep 1930
5-Month
12.57"
(319.28mm)
19.66"
(499.36mm)
-7.09"
(-180.08mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
1915
Apr–Sep 1930
6-Month
14.65"
(372.11mm)
23.57"
(598.68mm)
-8.92"
(-226.57mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
2011
Mar–Sep 1930
7-Month
17.00"
(431.80mm)
27.38"
(695.45mm)
-10.38"
(-263.65mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
1945
Feb–Sep 1930
8-Month
19.60"
(497.84mm)
30.05"
(763.27mm)
-10.45"
(-265.43mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
1945
Jan–Sep 1930
9-Month
24.24"
(615.70mm)
33.10"
(840.74mm)
-8.86"
(-225.04mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
1950
Dec 1929–Sep 1930
10-Month
26.90"
(683.26mm)
36.19"
(919.23mm)
-9.29"
(-235.97mm)
1st Driest
Driest since:
1930
127th Wettest
Wettest since:
1950
Nov 1929–Sep 1930
11-Month
30.10"
(764.54mm)
39.33"
(998.98mm)
-9.23"
(-234.44mm)
1st Driest
Driest since:
1930
127th Wettest
Wettest since:
2019
Oct 1929–Sep 1930
12-Month
34.44"
(874.78mm)
42.25"
(1,073.15mm)
-7.81"
(-198.37mm)
8th Driest
Driest since:
1925
120th Wettest
Wettest since:
2019
Apr 1929–Sep 1930
18-Month
61.21"
(1,554.73mm)
65.79"
(1,671.07mm)
-4.58"
(-116.34mm)
22nd Driest
Driest since:
1931
106th Wettest
Wettest since:
2019
Oct 1928–Sep 1930
24-Month
81.76"
(2,076.70mm)
84.47"
(2,145.54mm)
-2.71"
(-68.84mm)
40th Driest
Driest since:
1941
87th Wettest
Wettest since:
2020
Oct 1927–Sep 1930
36-Month
126.32"
(3,208.53mm)
126.72"
(3,218.69mm)
-0.40"
(-10.16mm)
54th Driest
Driest since:
1941
72nd Wettest
Wettest since:
2020
Oct 1926–Sep 1930
48-Month
178.02"
(4,521.71mm)
168.99"
(4,292.35mm)
9.03"
(229.36mm)
93rd Driest
Driest since:
1956
32nd Wettest
Wettest since:
2021
Oct 1925–Sep 1930
60-Month
222.85"
(5,660.39mm)
211.21"
(5,364.73mm)
11.64"
(295.66mm)
95th Driest
Driest since:
1956
29th Wettest
Wettest to Date
2020

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