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 2019

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 2019
1-Month 		3.57"
(90.68mm)		 3.11"
(78.99mm)		 0.46"
(11.69mm)		 82nd Driest
Driest since:
 1958
46th Wettest
Wettest since:
 1990
Nov–Dec 2019
2-Month 		6.71"
(170.43mm)		 6.23"
(158.24mm)		 0.48"
(12.19mm)		 79th Driest
Driest since:
 1976
49th Wettest
Wettest since:
 2015
Ties: 2001
Oct–Dec 2019
3-Month 		11.97"
(304.04mm)		 9.13"
(231.90mm)		 2.84"
(72.14mm)		 112th Driest
Driest since:
 1963
16th Wettest
Wettest since:
 1990
Sep–Dec 2019
4-Month 		14.26"
(362.20mm)		 12.60"
(320.04mm)		 1.66"
(42.16mm)		 86th Driest
Driest since:
 1963
42nd Wettest
Wettest since:
 1926
Aug–Dec 2019
5-Month 		18.56"
(471.42mm)		 16.27"
(413.26mm)		 2.29"
(58.16mm)		 97th Driest
Driest since:
 1953
31st Wettest
Wettest since:
 1926
Jul–Dec 2019
6-Month 		23.00"
(584.20mm)		 20.27"
(514.86mm)		 2.73"
(69.34mm)		 97th Driest
Driest since:
 1953
31st Wettest
Wettest since:
 1926
Ties: 1961
Jun–Dec 2019
7-Month 		29.16"
(740.66mm)		 24.52"
(622.81mm)		 4.64"
(117.85mm)		 114th Driest
Driest since:
 1953
14th Wettest
Wettest since:
 2015
May–Dec 2019
8-Month 		35.82"
(909.83mm)		 28.79"
(731.27mm)		 7.03"
(178.56mm)		 121st Driest
Driest since:
 1953
7th Wettest
Wettest since:
 2015
Apr–Dec 2019
9-Month 		40.40"
(1,026.16mm)		 32.70"
(830.58mm)		 7.70"
(195.58mm)		 123rd Driest
Driest since:
 1930
5th Wettest
Wettest since:
 2015
Mar–Dec 2019
10-Month 		44.30"
(1,125.22mm)		 36.51"
(927.35mm)		 7.79"
(197.87mm)		 120th Driest
Driest since:
 1930
8th Wettest
Wettest since:
 2011
Feb–Dec 2019
11-Month 		50.11"
(1,272.79mm)		 39.19"
(995.43mm)		 10.92"
(277.36mm)		 125th Driest
Driest since:
 1930
3rd Wettest
Wettest since:
 2011
Jan–Dec 2019
12-Month 		53.96"
(1,370.58mm)		 42.23"
(1,072.64mm)		 11.73"
(297.94mm)		 127th Driest
Driest since:
 1930
1st Wettest
Wettest to Date
 2019
Jul 2018–Dec 2019
18-Month 		80.61"
(2,047.49mm)		 62.51"
(1,587.75mm)		 18.10"
(459.74mm)		 126th Driest
Driest since:
 1953
1st Wettest
Wettest to Date
 2019
Jan 2018–Dec 2019
24-Month 		107.02"
(2,718.31mm)		 84.45"
(2,145.03mm)		 22.57"
(573.28mm)		 126th Driest
Driest since:
 1953
1st Wettest
Wettest to Date
 2019
Jan 2017–Dec 2019
36-Month 		152.38"
(3,870.45mm)		 126.69"
(3,217.93mm)		 25.69"
(652.52mm)		 124th Driest
Driest since:
 1954
2nd Wettest
Wettest to Date
 2020
Jan 2016–Dec 2019
48-Month 		194.84"
(4,948.94mm)		 168.95"
(4,291.33mm)		 25.89"
(657.61mm)		 121st Driest
Driest since:
 1955
4th Wettest
Wettest since:
 2021
Jan 2015–Dec 2019
60-Month 		246.86"
(6,270.24mm)		 211.20"
(5,364.48mm)		 35.66"
(905.76mm)		 122nd Driest
Driest since:
 1956
2nd Wettest
Wettest to Date
 2021

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