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, December 1930

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 1930
1-Month
1.61"
(40.89mm)
3.11"
(78.99mm)
-1.50"
(-38.10mm)
10th Driest
Driest since:
1958
118th Wettest
Wettest since:
1990
Nov–Dec 1930
2-Month
3.89"
(98.81mm)
6.23"
(158.24mm)
-2.34"
(-59.43mm)
13th Driest
Driest since:
1976
115th Wettest
Wettest since:
2015
Oct–Dec 1930
3-Month
6.00"
(152.40mm)
9.13"
(231.90mm)
-3.13"
(-79.50mm)
10th Driest
Driest since:
1963
118th Wettest
Wettest since:
1990
Sep–Dec 1930
4-Month
9.31"
(236.47mm)
12.60"
(320.04mm)
-3.29"
(-83.57mm)
14th Driest
Driest since:
1963
114th Wettest
Wettest since:
1926
Aug–Dec 1930
5-Month
11.51"
(292.35mm)
16.27"
(413.26mm)
-4.76"
(-120.91mm)
7th Driest
Driest since:
1953
121st Wettest
Wettest since:
1926
Ties: 1976, 1999
Jul–Dec 1930
6-Month
12.97"
(329.44mm)
20.27"
(514.86mm)
-7.30"
(-185.42mm)
2nd Driest
Driest since:
1953
126th Wettest
Wettest since:
1926
Jun–Dec 1930
7-Month
15.67"
(398.02mm)
24.52"
(622.81mm)
-8.85"
(-224.79mm)
2nd Driest
Driest since:
1953
126th Wettest
Wettest since:
2015
May–Dec 1930
8-Month
18.57"
(471.68mm)
28.79"
(731.27mm)
-10.22"
(-259.59mm)
2nd Driest
Driest since:
1953
126th Wettest
Wettest since:
2015
Apr–Dec 1930
9-Month
20.65"
(524.51mm)
32.70"
(830.58mm)
-12.05"
(-306.07mm)
1st Driest
Driest since:
1930
127th Wettest
Wettest since:
2015
Mar–Dec 1930
10-Month
23.00"
(584.20mm)
36.51"
(927.35mm)
-13.51"
(-343.15mm)
1st Driest
Driest since:
1930
127th Wettest
Wettest since:
2011
Feb–Dec 1930
11-Month
25.60"
(650.24mm)
39.19"
(995.43mm)
-13.59"
(-345.19mm)
1st Driest
Driest since:
1930
127th Wettest
Wettest since:
2011
Jan–Dec 1930
12-Month
30.24"
(768.10mm)
42.23"
(1,072.64mm)
-11.99"
(-304.54mm)
1st Driest
Driest since:
1930
127th Wettest
Wettest since:
2019
Jul 1929–Dec 1930
18-Month
50.74"
(1,288.80mm)
62.51"
(1,587.75mm)
-11.77"
(-298.95mm)
5th Driest
Driest since:
1953
122nd Wettest
Wettest since:
2019
Jan 1929–Dec 1930
24-Month
78.04"
(1,982.22mm)
84.45"
(2,145.03mm)
-6.41"
(-162.81mm)
15th Driest
Driest since:
1953
112th Wettest
Wettest since:
2019
Jan 1928–Dec 1930
36-Month
120.70"
(3,065.78mm)
126.69"
(3,217.93mm)
-5.99"
(-152.15mm)
23rd Driest
Driest since:
1954
103rd Wettest
Wettest since:
2020
Jan 1927–Dec 1930
48-Month
171.95"
(4,367.53mm)
168.95"
(4,291.33mm)
3.00"
(76.20mm)
73rd Driest
Driest since:
1955
52nd Wettest
Wettest since:
2021
Jan 1926–Dec 1930
60-Month
218.16"
(5,541.26mm)
211.20"
(5,364.48mm)
6.96"
(176.78mm)
81st Driest
Driest since:
1956
43rd Wettest
Wettest since:
2021

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