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 2018

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
December 2018
1-Month
4.36"
(110.74mm)
3.11"
(78.99mm)
1.25"
(31.75mm)
109th Driest
Driest since:
1958
20th Wettest
Wettest since:
1990
Nov–Dec 2018
2-Month
8.59"
(218.19mm)
6.23"
(158.24mm)
2.36"
(59.95mm)
111th Driest
Driest since:
1976
18th Wettest
Wettest since:
2015
Oct–Dec 2018
3-Month
12.20"
(309.88mm)
9.13"
(231.90mm)
3.07"
(77.98mm)
115th Driest
Driest since:
1963
14th Wettest
Wettest since:
1990
Sep–Dec 2018
4-Month
18.12"
(460.25mm)
12.60"
(320.04mm)
5.52"
(140.21mm)
127th Driest
Driest since:
1963
2nd Wettest
Wettest since:
1926
Aug–Dec 2018
5-Month
23.23"
(590.04mm)
16.27"
(413.26mm)
6.96"
(176.78mm)
127th Driest
Driest since:
1953
2nd Wettest
Wettest since:
1926
Jul–Dec 2018
6-Month
26.65"
(676.91mm)
20.27"
(514.86mm)
6.38"
(162.05mm)
126th Driest
Driest since:
1953
3rd Wettest
Wettest since:
1926
Jun–Dec 2018
7-Month
32.19"
(817.63mm)
24.52"
(622.81mm)
7.67"
(194.82mm)
126th Driest
Driest since:
1953
3rd Wettest
Wettest since:
2015
May–Dec 2018
8-Month
36.54"
(928.12mm)
28.79"
(731.27mm)
7.75"
(196.85mm)
124th Driest
Driest since:
1953
5th Wettest
Wettest since:
2015
Apr–Dec 2018
9-Month
40.24"
(1,022.10mm)
32.70"
(830.58mm)
7.54"
(191.52mm)
122nd Driest
Driest since:
1930
7th Wettest
Wettest since:
2015
Mar–Dec 2018
10-Month
44.45"
(1,129.03mm)
36.51"
(927.35mm)
7.94"
(201.68mm)
122nd Driest
Driest since:
1930
7th Wettest
Wettest since:
2011
Feb–Dec 2018
11-Month
51.00"
(1,295.40mm)
39.19"
(995.43mm)
11.81"
(299.97mm)
127th Driest
Driest since:
1930
2nd Wettest
Wettest since:
2011
Jan–Dec 2018
12-Month
53.06"
(1,347.72mm)
42.23"
(1,072.64mm)
10.83"
(275.08mm)
126th Driest
Driest since:
1930
3rd Wettest
Wettest since:
2019
Jul 2017–Dec 2018
18-Month
72.96"
(1,853.18mm)
62.51"
(1,587.75mm)
10.45"
(265.43mm)
122nd Driest
Driest since:
1953
6th Wettest
Wettest since:
2019
Jan 2017–Dec 2018
24-Month
98.42"
(2,499.87mm)
84.45"
(2,145.03mm)
13.97"
(354.84mm)
122nd Driest
Driest since:
1953
6th Wettest
Wettest since:
2019
Jan 2016–Dec 2018
36-Month
140.88"
(3,578.35mm)
126.69"
(3,217.93mm)
14.19"
(360.42mm)
115th Driest
Driest since:
1954
12th Wettest
Wettest since:
2020
Jan 2015–Dec 2018
48-Month
192.90"
(4,899.66mm)
168.95"
(4,291.33mm)
23.95"
(608.33mm)
120th Driest
Driest since:
1955
6th Wettest
Wettest since:
2021
Jan 2014–Dec 2018
60-Month
236.17"
(5,998.72mm)
211.20"
(5,364.48mm)
24.97"
(634.24mm)
120th Driest
Driest since:
1956
5th Wettest
Wettest to Date
2021

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