Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 1947

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
December 1947
1-Month 		1.90"
(48.26mm)		 3.11"
(78.99mm)		 -1.21"
(-30.73mm)		 21st Driest
Driest since:
 1958
108th Wettest
Wettest since:
 1990
Nov–Dec 1947
2-Month 		4.68"
(118.87mm)		 6.23"
(158.24mm)		 -1.55"
(-39.37mm)		 23rd Driest
Driest since:
 1976
106th Wettest
Wettest since:
 2015
Ties: 1908
Oct–Dec 1947
3-Month 		7.37"
(187.20mm)		 9.13"
(231.90mm)		 -1.76"
(-44.70mm)		 30th Driest
Driest since:
 1963
99th Wettest
Wettest since:
 1990
Ties: 1964
Sep–Dec 1947
4-Month 		10.76"
(273.30mm)		 12.60"
(320.04mm)		 -1.84"
(-46.74mm)		 32nd Driest
Driest since:
 1963
97th Wettest
Wettest since:
 1926
Aug–Dec 1947
5-Month 		13.94"
(354.08mm)		 16.27"
(413.26mm)		 -2.33"
(-59.18mm)		 24th Driest
Driest since:
 1953
105th Wettest
Wettest since:
 1926
Jul–Dec 1947
6-Month 		16.97"
(431.04mm)		 20.27"
(514.86mm)		 -3.30"
(-83.82mm)		 18th Driest
Driest since:
 1953
111th Wettest
Wettest since:
 1926
Jun–Dec 1947
7-Month 		22.80"
(579.12mm)		 24.52"
(622.81mm)		 -1.72"
(-43.69mm)		 38th Driest
Driest since:
 1953
91st Wettest
Wettest since:
 2015
May–Dec 1947
8-Month 		27.61"
(701.29mm)		 28.79"
(731.27mm)		 -1.18"
(-29.98mm)		 46th Driest
Driest since:
 1953
83rd Wettest
Wettest since:
 2015
Apr–Dec 1947
9-Month 		33.13"
(841.50mm)		 32.70"
(830.58mm)		 0.43"
(10.92mm)		 62nd Driest
Driest since:
 1930
67th Wettest
Wettest since:
 2015
Mar–Dec 1947
10-Month 		35.62"
(904.75mm)		 36.51"
(927.35mm)		 -0.89"
(-22.60mm)		 50th Driest
Driest since:
 1930
79th Wettest
Wettest since:
 2011
Feb–Dec 1947
11-Month 		36.26"
(921.00mm)		 39.19"
(995.43mm)		 -2.93"
(-74.43mm)		 33rd Driest
Driest since:
 1930
96th Wettest
Wettest since:
 2011
Ties: 1966
Jan–Dec 1947
12-Month 		40.30"
(1,023.62mm)		 42.23"
(1,072.64mm)		 -1.93"
(-49.02mm)		 38th Driest
Driest since:
 1930
91st Wettest
Wettest since:
 2019
Jul 1946–Dec 1947
18-Month 		59.73"
(1,517.14mm)		 62.51"
(1,587.75mm)		 -2.78"
(-70.61mm)		 30th Driest
Driest since:
 1953
98th Wettest
Wettest since:
 2019
Jan 1946–Dec 1947
24-Month 		82.32"
(2,090.93mm)		 84.45"
(2,145.03mm)		 -2.13"
(-54.10mm)		 36th Driest
Driest since:
 1953
92nd Wettest
Wettest since:
 2019
Jan 1945–Dec 1947
36-Month 		132.31"
(3,360.67mm)		 126.69"
(3,217.93mm)		 5.62"
(142.74mm)		 85th Driest
Driest since:
 1954
42nd Wettest
Wettest since:
 2020
Jan 1944–Dec 1947
48-Month 		171.85"
(4,364.99mm)		 168.95"
(4,291.33mm)		 2.90"
(73.66mm)		 71st Driest
Driest since:
 1955
55th Wettest
Wettest since:
 2021
Jan 1943–Dec 1947
60-Month 		209.50"
(5,321.30mm)		 211.20"
(5,364.48mm)		 -1.70"
(-43.18mm)		 45th Driest
Driest since:
 1956
80th Wettest
Wettest since:
 2021

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