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 2020

View Period (Months):
Download: csv json xml
  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 2020
1-Month
2.56"
(65.02mm)
3.11"
(78.99mm)
-0.55"
(-13.97mm)
42nd Driest
Driest since:
1958
86th Wettest
Wettest since:
1990
Nov–Dec 2020
2-Month
5.24"
(133.10mm)
6.23"
(158.24mm)
-0.99"
(-25.14mm)
42nd Driest
Driest since:
1976
86th Wettest
Wettest since:
2015
Ties: 1998
Oct–Dec 2020
3-Month
9.23"
(234.44mm)
9.13"
(231.90mm)
0.10"
(2.54mm)
61st Driest
Driest since:
1963
67th Wettest
Wettest since:
1990
Sep–Dec 2020
4-Month
12.47"
(316.74mm)
12.60"
(320.04mm)
-0.13"
(-3.30mm)
59th Driest
Driest since:
1963
69th Wettest
Wettest since:
1926
Aug–Dec 2020
5-Month
16.27"
(413.26mm)
16.27"
(413.26mm)
0.00"
(0.00mm)
59th Driest
Driest since:
1953
69th Wettest
Wettest since:
1926
Ties: 1969
Jul–Dec 2020
6-Month
21.20"
(538.48mm)
20.27"
(514.86mm)
0.93"
(23.62mm)
72nd Driest
Driest since:
1953
56th Wettest
Wettest since:
1926
Jun–Dec 2020
7-Month
25.11"
(637.79mm)
24.52"
(622.81mm)
0.59"
(14.98mm)
63rd Driest
Driest since:
1953
65th Wettest
Wettest since:
2015
May–Dec 2020
8-Month
30.54"
(775.72mm)
28.79"
(731.27mm)
1.75"
(44.45mm)
74th Driest
Driest since:
1953
54th Wettest
Wettest since:
2015
Apr–Dec 2020
9-Month
35.11"
(891.79mm)
32.70"
(830.58mm)
2.41"
(61.21mm)
81st Driest
Driest since:
1930
47th Wettest
Wettest since:
2015
Mar–Dec 2020
10-Month
40.58"
(1,030.73mm)
36.51"
(927.35mm)
4.07"
(103.38mm)
96th Driest
Driest since:
1930
32nd Wettest
Wettest since:
2011
Feb–Dec 2020
11-Month
44.72"
(1,135.89mm)
39.19"
(995.43mm)
5.53"
(140.46mm)
111th Driest
Driest since:
1930
17th Wettest
Wettest since:
2011
Jan–Dec 2020
12-Month
49.29"
(1,251.97mm)
42.23"
(1,072.64mm)
7.06"
(179.33mm)
114th Driest
Driest since:
1930
14th Wettest
Wettest since:
2019
Jul 2019–Dec 2020
18-Month
72.29"
(1,836.17mm)
62.51"
(1,587.75mm)
9.78"
(248.42mm)
117th Driest
Driest since:
1953
10th Wettest
Wettest since:
2019
Jan 2019–Dec 2020
24-Month
103.25"
(2,622.55mm)
84.45"
(2,145.03mm)
18.80"
(477.52mm)
125th Driest
Driest since:
1953
2nd Wettest
Wettest since:
2019
Jan 2018–Dec 2020
36-Month
156.31"
(3,970.27mm)
126.69"
(3,217.93mm)
29.62"
(752.34mm)
125th Driest
Driest since:
1954
1st Wettest
Wettest to Date
2020
Jan 2017–Dec 2020
48-Month
201.67"
(5,122.42mm)
168.95"
(4,291.33mm)
32.72"
(831.09mm)
123rd Driest
Driest since:
1955
2nd Wettest
Wettest to Date
2021
Jan 2016–Dec 2020
60-Month
244.13"
(6,200.90mm)
211.20"
(5,364.48mm)
32.93"
(836.42mm)
121st Driest
Driest since:
1956
3rd Wettest
Wettest since:
2021

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