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 2021

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 2021
1-Month
3.30"
(83.82mm)
3.11"
(78.99mm)
0.19"
(4.83mm)
75th Driest
Driest since:
1958
53rd Wettest
Wettest since:
1990
Nov–Dec 2021
2-Month
4.66"
(118.36mm)
6.23"
(158.24mm)
-1.57"
(-39.88mm)
22nd Driest
Driest since:
1976
106th Wettest
Wettest since:
2015
Oct–Dec 2021
3-Month
9.96"
(252.98mm)
9.13"
(231.90mm)
0.83"
(21.08mm)
75th Driest
Driest since:
1963
53rd Wettest
Wettest since:
1990
Sep–Dec 2021
4-Month
13.43"
(341.12mm)
12.60"
(320.04mm)
0.83"
(21.08mm)
71st Driest
Driest since:
1963
57th Wettest
Wettest since:
1926
Aug–Dec 2021
5-Month
17.84"
(453.14mm)
16.27"
(413.26mm)
1.57"
(39.88mm)
83rd Driest
Driest since:
1953
45th Wettest
Wettest since:
1926
Jul–Dec 2021
6-Month
22.98"
(583.69mm)
20.27"
(514.86mm)
2.71"
(68.83mm)
95th Driest
Driest since:
1953
33rd Wettest
Wettest since:
1926
Jun–Dec 2021
7-Month
28.08"
(713.23mm)
24.52"
(622.81mm)
3.56"
(90.42mm)
104th Driest
Driest since:
1953
24th Wettest
Wettest since:
2015
May–Dec 2021
8-Month
32.21"
(818.13mm)
28.79"
(731.27mm)
3.42"
(86.86mm)
97th Driest
Driest since:
1953
31st Wettest
Wettest since:
2015
Apr–Dec 2021
9-Month
35.50"
(901.70mm)
32.70"
(830.58mm)
2.80"
(71.12mm)
86th Driest
Driest since:
1930
42nd Wettest
Wettest since:
2015
Mar–Dec 2021
10-Month
40.81"
(1,036.57mm)
36.51"
(927.35mm)
4.30"
(109.22mm)
101st Driest
Driest since:
1930
27th Wettest
Wettest since:
2011
Feb–Dec 2021
11-Month
43.47"
(1,104.14mm)
39.19"
(995.43mm)
4.28"
(108.71mm)
99th Driest
Driest since:
1930
29th Wettest
Wettest since:
2011
Jan–Dec 2021
12-Month
46.42"
(1,179.07mm)
42.23"
(1,072.64mm)
4.19"
(106.43mm)
97th Driest
Driest since:
1930
31st Wettest
Wettest since:
2019
Jul 2020–Dec 2021
18-Month
67.62"
(1,717.55mm)
62.51"
(1,587.75mm)
5.11"
(129.80mm)
95th Driest
Driest since:
1953
32nd Wettest
Wettest since:
2019
Jan 2020–Dec 2021
24-Month
95.71"
(2,431.03mm)
84.45"
(2,145.03mm)
11.26"
(286.00mm)
114th Driest
Driest since:
1953
13th Wettest
Wettest since:
2019
Jan 2019–Dec 2021
36-Month
149.67"
(3,801.62mm)
126.69"
(3,217.93mm)
22.98"
(583.69mm)
123rd Driest
Driest since:
1954
3rd Wettest
Wettest since:
2020
Jan 2018–Dec 2021
48-Month
202.73"
(5,149.34mm)
168.95"
(4,291.33mm)
33.78"
(858.01mm)
124th Driest
Driest since:
1955
1st Wettest
Wettest to Date
2021
Jan 2017–Dec 2021
60-Month
248.09"
(6,301.49mm)
211.20"
(5,364.48mm)
36.89"
(937.01mm)
123rd Driest
Driest since:
1956
1st Wettest
Wettest to Date
2021

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