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 1917

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
December 1917
1-Month
1.66"
(42.16mm)
2.35"
(59.69mm)
-0.69"
(-17.53mm)
12th Driest
Driest since:
1930
117th Wettest
Wettest since:
2015
Ties: 1900, 1925
Nov–Dec 1917
2-Month
2.61"
(66.29mm)
4.58"
(116.33mm)
-1.97"
(-50.04mm)
2nd Driest
Driest since:
1976
127th Wettest
Wettest since:
2015
Oct–Dec 1917
3-Month
3.99"
(101.35mm)
6.74"
(171.20mm)
-2.75"
(-69.85mm)
1st Driest
Driest since:
1917
128th Wettest
Wettest since:
2015
Sep–Dec 1917
4-Month
6.16"
(156.46mm)
9.23"
(234.44mm)
-3.07"
(-77.98mm)
2nd Driest
Driest since:
1939
127th Wettest
Wettest since:
2018
Aug–Dec 1917
5-Month
8.60"
(218.44mm)
11.85"
(300.99mm)
-3.25"
(-82.55mm)
1st Driest
Driest since:
1917
128th Wettest
Wettest since:
2018
Jul–Dec 1917
6-Month
11.11"
(282.19mm)
14.62"
(371.35mm)
-3.51"
(-89.16mm)
1st Driest
Driest since:
1917
128th Wettest
Wettest since:
2018
Jun–Dec 1917
7-Month
13.55"
(344.17mm)
17.55"
(445.77mm)
-4.00"
(-101.60mm)
1st Driest
Driest since:
1917
128th Wettest
Wettest since:
2018
May–Dec 1917
8-Month
16.19"
(411.23mm)
20.46"
(519.68mm)
-4.27"
(-108.45mm)
1st Driest
Driest since:
1917
128th Wettest
Wettest since:
2015
Apr–Dec 1917
9-Month
18.87"
(479.30mm)
22.98"
(583.69mm)
-4.11"
(-104.39mm)
3rd Driest
Driest since:
1956
126th Wettest
Wettest since:
2015
Mar–Dec 1917
10-Month
21.35"
(542.29mm)
25.49"
(647.45mm)
-4.14"
(-105.16mm)
5th Driest
Driest since:
1956
124th Wettest
Wettest since:
2015
Feb–Dec 1917
11-Month
23.16"
(588.26mm)
27.62"
(701.55mm)
-4.46"
(-113.29mm)
4th Driest
Driest since:
1910
125th Wettest
Wettest since:
2018
Jan–Dec 1917
12-Month
25.35"
(643.89mm)
29.94"
(760.48mm)
-4.59"
(-116.59mm)
2nd Driest
Driest since:
1910
127th Wettest
Wettest since:
1973
Jul 1916–Dec 1917
18-Month
38.87"
(987.30mm)
44.58"
(1,132.33mm)
-5.71"
(-145.03mm)
2nd Driest
Driest since:
1954
126th Wettest
Wettest since:
2019
Jan 1916–Dec 1917
24-Month
54.77"
(1,391.16mm)
59.90"
(1,521.46mm)
-5.13"
(-130.30mm)
11th Driest
Driest since:
1931
117th Wettest
Wettest since:
2019
Jan 1915–Dec 1917
36-Month
87.54"
(2,223.52mm)
89.86"
(2,282.44mm)
-2.32"
(-58.92mm)
38th Driest
Driest since:
1956
89th Wettest
Wettest since:
2019
Jan 1914–Dec 1917
48-Month
116.35"
(2,955.29mm)
119.78"
(3,042.41mm)
-3.43"
(-87.12mm)
29th Driest
Driest since:
1956
97th Wettest
Wettest since:
2019
Jan 1913–Dec 1917
60-Month
146.19"
(3,713.23mm)
149.68"
(3,801.87mm)
-3.49"
(-88.64mm)
32nd Driest
Driest since:
1956
93rd Wettest
Wettest since:
2019

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