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 1906

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1906
1-Month
3.16"
(80.26mm)
2.91"
(73.91mm)
0.25"
(6.35mm)
88th Driest
Driest since:
1934
41st Wettest
Wettest since:
2019
Ties: 1942
Apr–May 1906
2-Month
5.24"
(133.10mm)
5.43"
(137.92mm)
-0.19"
(-4.82mm)
52nd Driest
Driest since:
1934
77th Wettest
Wettest since:
1957
Ties: 2007
Mar–May 1906
3-Month
8.50"
(215.90mm)
7.94"
(201.68mm)
0.56"
(14.22mm)
99th Driest
Driest since:
1925
30th Wettest
Wettest since:
1957, 1991
Feb–May 1906
4-Month
10.22"
(259.59mm)
10.07"
(255.78mm)
0.15"
(3.81mm)
75th Driest
Driest since:
1925
54th Wettest
Wettest since:
2019
Jan–May 1906
5-Month
12.75"
(323.85mm)
12.39"
(314.71mm)
0.36"
(9.14mm)
83rd Driest
Driest since:
1934
46th Wettest
Wettest since:
2019
Dec 1905–May 1906
6-Month
15.05"
(382.27mm)
14.73"
(374.14mm)
0.32"
(8.13mm)
72nd Driest
Driest since:
1931
56th Wettest
Wettest since:
2019
Nov 1905–May 1906
7-Month
17.24"
(437.90mm)
16.96"
(430.78mm)
0.28"
(7.12mm)
74th Driest
Driest since:
1934
54th Wettest
Wettest since:
1983
Oct 1905–May 1906
8-Month
19.41"
(493.01mm)
19.13"
(485.90mm)
0.28"
(7.11mm)
69th Driest
Driest since:
1934
59th Wettest
Wettest since:
2019
Sep 1905–May 1906
9-Month
21.98"
(558.29mm)
21.62"
(549.15mm)
0.36"
(9.14mm)
70th Driest
Driest since:
1934
58th Wettest
Wettest since:
2019
Aug 1905–May 1906
10-Month
24.52"
(622.81mm)
24.25"
(615.95mm)
0.27"
(6.86mm)
68th Driest
Driest since:
1918
60th Wettest
Wettest since:
2019
Jul 1905–May 1906
11-Month
28.04"
(712.22mm)
27.03"
(686.56mm)
1.01"
(25.66mm)
86th Driest
Driest since:
1931
42nd Wettest
Wettest since:
2019
Jun 1905–May 1906
12-Month
31.34"
(796.04mm)
29.95"
(760.73mm)
1.39"
(35.31mm)
91st Driest
Driest since:
1934
37th Wettest
Wettest since:
2019
Dec 1904–May 1906
18-Month
47.51"
(1,206.75mm)
44.70"
(1,135.38mm)
2.81"
(71.37mm)
100th Driest
Driest since:
1931
27th Wettest
Wettest to Date
2019
Jun 1904–May 1906
24-Month
61.25"
(1,555.75mm)
59.92"
(1,521.97mm)
1.33"
(33.78mm)
81st Driest
Driest since:
1931
46th Wettest
Wettest to Date
2020
Jun 1903–May 1906
36-Month
89.35"
(2,269.49mm)
89.88"
(2,282.95mm)
-0.53"
(-13.46mm)
55th Driest
Driest since:
1955
71st Wettest
Wettest since:
2019
Jun 1902–May 1906
48-Month
121.53"
(3,086.86mm)
119.78"
(3,042.41mm)
1.75"
(44.45mm)
74th Driest
Driest since:
1956
51st Wettest
Wettest to Date
2019
Jun 1901–May 1906
60-Month
149.32"
(3,792.73mm)
149.64"
(3,800.86mm)
-0.32"
(-8.13mm)
58th Driest
Driest since:
1957
66th Wettest
Wettest to Date
2020

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