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 1957

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1957
1-Month
4.24"
(107.70mm)
2.91"
(73.91mm)
1.33"
(33.79mm)
126th Driest
Driest since:
1934
3rd Wettest
Wettest to Date
2019
Apr–May 1957
2-Month
7.89"
(200.41mm)
5.43"
(137.92mm)
2.46"
(62.49mm)
128th Driest
Driest since:
1934
1st Wettest
Wettest to Date
1957
Mar–May 1957
3-Month
10.40"
(264.16mm)
7.94"
(201.68mm)
2.46"
(62.48mm)
128th Driest
Driest since:
1925
1st Wettest
Wettest to Date
1957, 1991
Ties: 1991
Feb–May 1957
4-Month
12.48"
(316.99mm)
10.07"
(255.78mm)
2.41"
(61.21mm)
126th Driest
Driest since:
1925
3rd Wettest
Wettest to Date
2019
Jan–May 1957
5-Month
14.61"
(371.09mm)
12.39"
(314.71mm)
2.22"
(56.38mm)
121st Driest
Driest since:
1934
8th Wettest
Wettest to Date
2019
Dec 1956–May 1957
6-Month
16.61"
(421.89mm)
14.73"
(374.14mm)
1.88"
(47.75mm)
115th Driest
Driest since:
1931
13th Wettest
Wettest to Date
2019
Nov 1956–May 1957
7-Month
17.97"
(456.44mm)
16.96"
(430.78mm)
1.01"
(25.66mm)
95th Driest
Driest since:
1934
33rd Wettest
Wettest since:
1983
Oct 1956–May 1957
8-Month
19.97"
(507.24mm)
19.13"
(485.90mm)
0.84"
(21.34mm)
86th Driest
Driest since:
1934
42nd Wettest
Wettest since:
2019
Sep 1956–May 1957
9-Month
21.41"
(543.81mm)
21.62"
(549.15mm)
-0.21"
(-5.34mm)
59th Driest
Driest since:
1934
69th Wettest
Wettest since:
2019
Aug 1956–May 1957
10-Month
23.62"
(599.95mm)
24.25"
(615.95mm)
-0.63"
(-16.00mm)
42nd Driest
Driest since:
1918
86th Wettest
Wettest since:
2019
Ties: 1976, 1994
Jul 1956–May 1957
11-Month
26.40"
(670.56mm)
27.03"
(686.56mm)
-0.63"
(-16.00mm)
41st Driest
Driest since:
1931
87th Wettest
Wettest since:
2019
Ties: 1971
Jun 1956–May 1957
12-Month
28.61"
(726.69mm)
29.95"
(760.73mm)
-1.34"
(-34.04mm)
36th Driest
Driest since:
1934
92nd Wettest
Wettest since:
2019
Dec 1955–May 1957
18-Month
42.23"
(1,072.64mm)
44.70"
(1,135.38mm)
-2.47"
(-62.74mm)
25th Driest
Driest since:
1931
102nd Wettest
Wettest since:
2019
Ties: 2000
Jun 1955–May 1957
24-Month
56.43"
(1,433.32mm)
59.92"
(1,521.97mm)
-3.49"
(-88.65mm)
19th Driest
Driest since:
1931
108th Wettest
Wettest since:
2020
Jun 1954–May 1957
36-Month
82.60"
(2,098.04mm)
89.88"
(2,282.95mm)
-7.28"
(-184.91mm)
5th Driest
Driest since:
1955
121st Wettest
Wettest since:
2019
Jun 1953–May 1957
48-Month
108.66"
(2,759.96mm)
119.78"
(3,042.41mm)
-11.12"
(-282.45mm)
2nd Driest
Driest since:
1956
123rd Wettest
Wettest since:
2019
Jun 1952–May 1957
60-Month
136.07"
(3,456.18mm)
149.64"
(3,800.86mm)
-13.57"
(-344.68mm)
1st Driest
Driest since:
1957
123rd Wettest
Wettest since:
2020

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