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 1933

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1933
1-Month
3.39"
(86.11mm)
2.91"
(73.91mm)
0.48"
(12.20mm)
110th Driest
Driest since:
1934
19th Wettest
Wettest since:
2019
Ties: 1943
Apr–May 1933
2-Month
5.93"
(150.62mm)
5.43"
(137.92mm)
0.50"
(12.70mm)
96th Driest
Driest since:
1934
33rd Wettest
Wettest since:
1957
Ties: 1938
Mar–May 1933
3-Month
8.40"
(213.36mm)
7.94"
(201.68mm)
0.46"
(11.68mm)
92nd Driest
Driest since:
1925
37th Wettest
Wettest since:
1957, 1991
Ties: 1943
Feb–May 1933
4-Month
10.34"
(262.64mm)
10.07"
(255.78mm)
0.27"
(6.86mm)
81st Driest
Driest since:
1925
48th Wettest
Wettest since:
2019
Jan–May 1933
5-Month
12.59"
(319.79mm)
12.39"
(314.71mm)
0.20"
(5.08mm)
74th Driest
Driest since:
1934
55th Wettest
Wettest since:
2019
Dec 1932–May 1933
6-Month
15.51"
(393.95mm)
14.73"
(374.14mm)
0.78"
(19.81mm)
87th Driest
Driest since:
1931
41st Wettest
Wettest since:
2019
Nov 1932–May 1933
7-Month
17.53"
(445.26mm)
16.96"
(430.78mm)
0.57"
(14.48mm)
83rd Driest
Driest since:
1934
45th Wettest
Wettest since:
1983
Oct 1932–May 1933
8-Month
20.01"
(508.25mm)
19.13"
(485.90mm)
0.88"
(22.35mm)
87th Driest
Driest since:
1934
41st Wettest
Wettest since:
2019
Sep 1932–May 1933
9-Month
22.17"
(563.12mm)
21.62"
(549.15mm)
0.55"
(13.97mm)
78th Driest
Driest since:
1934
50th Wettest
Wettest since:
2019
Aug 1932–May 1933
10-Month
25.02"
(635.51mm)
24.25"
(615.95mm)
0.77"
(19.56mm)
82nd Driest
Driest since:
1918
46th Wettest
Wettest since:
2019
Ties: 1945
Jul 1932–May 1933
11-Month
27.62"
(701.55mm)
27.03"
(686.56mm)
0.59"
(14.99mm)
77th Driest
Driest since:
1931
51st Wettest
Wettest since:
2019
Jun 1932–May 1933
12-Month
30.68"
(779.27mm)
29.95"
(760.73mm)
0.73"
(18.54mm)
81st Driest
Driest since:
1934
47th Wettest
Wettest since:
2019
Dec 1931–May 1933
18-Month
46.41"
(1,178.81mm)
44.70"
(1,135.38mm)
1.71"
(43.43mm)
92nd Driest
Driest since:
1931
35th Wettest
Wettest since:
2019
Jun 1931–May 1933
24-Month
60.48"
(1,536.19mm)
59.92"
(1,521.97mm)
0.56"
(14.22mm)
68th Driest
Driest since:
1931
59th Wettest
Wettest since:
2020
Jun 1930–May 1933
36-Month
84.83"
(2,154.68mm)
89.88"
(2,282.95mm)
-5.05"
(-128.27mm)
16th Driest
Driest since:
1955
110th Wettest
Wettest since:
2019
Jun 1929–May 1933
48-Month
112.65"
(2,861.31mm)
119.78"
(3,042.41mm)
-7.13"
(-181.10mm)
7th Driest
Driest since:
1956
118th Wettest
Wettest since:
2019
Jun 1928–May 1933
60-Month
145.01"
(3,683.25mm)
149.64"
(3,800.86mm)
-4.63"
(-117.61mm)
24th Driest
Driest since:
1957
100th Wettest
Wettest since:
2020

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