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, May 1956

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1956
1-Month
2.60"
(66.04mm)
2.91"
(73.91mm)
-0.31"
(-7.87mm)
32nd Driest
Driest since:
1934
97th Wettest
Wettest since:
2019
Apr–May 1956
2-Month
4.67"
(118.62mm)
5.43"
(137.92mm)
-0.76"
(-19.30mm)
16th Driest
Driest since:
1934
113th Wettest
Wettest since:
1957
Mar–May 1956
3-Month
6.49"
(164.85mm)
7.94"
(201.68mm)
-1.45"
(-36.83mm)
8th Driest
Driest since:
1925
121st Wettest
Wettest since:
1957, 1991
Feb–May 1956
4-Month
9.11"
(231.39mm)
10.07"
(255.78mm)
-0.96"
(-24.39mm)
22nd Driest
Driest since:
1925
107th Wettest
Wettest since:
2019
Jan–May 1956
5-Month
11.38"
(289.05mm)
12.39"
(314.71mm)
-1.01"
(-25.66mm)
23rd Driest
Driest since:
1934
106th Wettest
Wettest since:
2019
Dec 1955–May 1956
6-Month
13.62"
(345.95mm)
14.73"
(374.14mm)
-1.11"
(-28.19mm)
29th Driest
Driest since:
1931
99th Wettest
Wettest since:
2019
Ties: 1936
Nov 1955–May 1956
7-Month
15.54"
(394.72mm)
16.96"
(430.78mm)
-1.42"
(-36.06mm)
21st Driest
Driest since:
1934
107th Wettest
Wettest since:
1983
Oct 1955–May 1956
8-Month
17.58"
(446.53mm)
19.13"
(485.90mm)
-1.55"
(-39.37mm)
23rd Driest
Driest since:
1934
105th Wettest
Wettest since:
2019
Sep 1955–May 1956
9-Month
19.69"
(500.13mm)
21.62"
(549.15mm)
-1.93"
(-49.02mm)
19th Driest
Driest since:
1934
109th Wettest
Wettest since:
2019
Aug 1955–May 1956
10-Month
22.43"
(569.72mm)
24.25"
(615.95mm)
-1.82"
(-46.23mm)
24th Driest
Driest since:
1918
104th Wettest
Wettest since:
2019
Jul 1955–May 1956
11-Month
25.35"
(643.89mm)
27.03"
(686.56mm)
-1.68"
(-42.67mm)
27th Driest
Driest since:
1931
101st Wettest
Wettest since:
2019
Jun 1955–May 1956
12-Month
27.82"
(706.63mm)
29.95"
(760.73mm)
-2.13"
(-54.10mm)
18th Driest
Driest since:
1934
110th Wettest
Wettest since:
2019
Ties: 1930
Dec 1954–May 1956
18-Month
41.12"
(1,044.45mm)
44.70"
(1,135.38mm)
-3.58"
(-90.93mm)
15th Driest
Driest since:
1931
112th Wettest
Wettest since:
2019
Jun 1954–May 1956
24-Month
53.99"
(1,371.35mm)
59.92"
(1,521.97mm)
-5.93"
(-150.62mm)
6th Driest
Driest since:
1931
121st Wettest
Wettest since:
2020
Ties: 1935
Jun 1953–May 1956
36-Month
80.05"
(2,033.27mm)
89.88"
(2,282.95mm)
-9.83"
(-249.68mm)
2nd Driest
Driest since:
1955
124th Wettest
Wettest since:
2019
Jun 1952–May 1956
48-Month
107.46"
(2,729.48mm)
119.78"
(3,042.41mm)
-12.32"
(-312.93mm)
1st Driest
Driest to Date
1956
124th Wettest
Wettest since:
2019
Jun 1951–May 1956
60-Month
139.24"
(3,536.70mm)
149.64"
(3,800.86mm)
-10.40"
(-264.16mm)
4th Driest
Driest since:
1957
120th Wettest
Wettest since:
2020

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