National Rankings

National Data Info
Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, December 1918

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  • Record Wettest
PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
December 1918
1-Month
2.66"
(67.56mm)
2.35"
(59.69mm)
0.31"
(7.87mm)
86th Driest
Driest since:
1930
43rd Wettest
Wettest since:
2015
Ties: 1933
Nov–Dec 1918
2-Month
4.98"
(126.49mm)
4.58"
(116.33mm)
0.40"
(10.16mm)
92nd Driest
Driest since:
1976
37th Wettest
Wettest since:
2015
Oct–Dec 1918
3-Month
7.90"
(200.66mm)
6.74"
(171.20mm)
1.16"
(29.46mm)
109th Driest
Driest since:
1917
20th Wettest
Wettest to Date
2015
Sep–Dec 1918
4-Month
10.34"
(262.64mm)
9.23"
(234.44mm)
1.11"
(28.20mm)
102nd Driest
Driest since:
1939
27th Wettest
Wettest since:
2018
Aug–Dec 1918
5-Month
12.81"
(325.37mm)
11.85"
(300.99mm)
0.96"
(24.38mm)
92nd Driest
Driest since:
1917
37th Wettest
Wettest since:
2018
Jul–Dec 1918
6-Month
15.14"
(384.56mm)
14.62"
(371.35mm)
0.52"
(13.21mm)
76th Driest
Driest since:
1917
53rd Wettest
Wettest since:
2018
Ties: 1970
Jun–Dec 1918
7-Month
17.39"
(441.71mm)
17.55"
(445.77mm)
-0.16"
(-4.06mm)
52nd Driest
Driest since:
1917
77th Wettest
Wettest since:
2018
May–Dec 1918
8-Month
19.98"
(507.49mm)
20.46"
(519.68mm)
-0.48"
(-12.19mm)
44th Driest
Driest since:
1917
85th Wettest
Wettest since:
2015
Apr–Dec 1918
9-Month
22.80"
(579.12mm)
22.98"
(583.69mm)
-0.18"
(-4.57mm)
49th Driest
Driest since:
1956
80th Wettest
Wettest since:
2015
Mar–Dec 1918
10-Month
24.65"
(626.11mm)
25.49"
(647.45mm)
-0.84"
(-21.34mm)
37th Driest
Driest since:
1956
92nd Wettest
Wettest since:
2015
Feb–Dec 1918
11-Month
26.37"
(669.80mm)
27.62"
(701.55mm)
-1.25"
(-31.75mm)
31st Driest
Driest since:
1910
98th Wettest
Wettest since:
2018
Jan–Dec 1918
12-Month
28.78"
(731.01mm)
29.94"
(760.48mm)
-1.16"
(-29.47mm)
32nd Driest
Driest since:
1910
97th Wettest
Wettest since:
1973
Ties: 1921
Jul 1917–Dec 1918
18-Month
39.89"
(1,013.21mm)
44.58"
(1,132.33mm)
-4.69"
(-119.12mm)
10th Driest
Driest since:
1954
118th Wettest
Wettest since:
2019
Jan 1917–Dec 1918
24-Month
54.13"
(1,374.90mm)
59.90"
(1,521.46mm)
-5.77"
(-146.56mm)
6th Driest
Driest to Date
1931
122nd Wettest
Wettest since:
2019
Jan 1916–Dec 1918
36-Month
83.55"
(2,122.17mm)
89.86"
(2,282.44mm)
-6.31"
(-160.27mm)
8th Driest
Driest to Date
1956
119th Wettest
Wettest since:
2019
Jan 1915–Dec 1918
48-Month
116.32"
(2,954.53mm)
119.78"
(3,042.41mm)
-3.46"
(-87.88mm)
28th Driest
Driest since:
1956
98th Wettest
Wettest since:
2019
Jan 1914–Dec 1918
60-Month
145.13"
(3,686.30mm)
149.68"
(3,801.87mm)
-4.55"
(-115.57mm)
22nd Driest
Driest since:
1956
103rd Wettest
Wettest since:
2019

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