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 1968

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1968
1-Month
3.33"
(84.58mm)
2.91"
(73.91mm)
0.42"
(10.67mm)
105th Driest
Driest since:
1934
24th Wettest
Wettest since:
2019
Apr–May 1968
2-Month
5.79"
(147.07mm)
5.43"
(137.92mm)
0.36"
(9.15mm)
88th Driest
Driest since:
1934
41st Wettest
Wettest since:
1957
Mar–May 1968
3-Month
7.95"
(201.93mm)
7.94"
(201.68mm)
0.01"
(0.25mm)
62nd Driest
Driest since:
1925
67th Wettest
Wettest since:
1957, 1991
Ties: 1981
Feb–May 1968
4-Month
9.43"
(239.52mm)
10.07"
(255.78mm)
-0.64"
(-16.26mm)
33rd Driest
Driest since:
1925
96th Wettest
Wettest since:
2019
Jan–May 1968
5-Month
11.60"
(294.64mm)
12.39"
(314.71mm)
-0.79"
(-20.07mm)
33rd Driest
Driest since:
1934
96th Wettest
Wettest since:
2019
Ties: 1901
Dec 1967–May 1968
6-Month
14.66"
(372.36mm)
14.73"
(374.14mm)
-0.07"
(-1.78mm)
61st Driest
Driest since:
1931
67th Wettest
Wettest since:
2019
Nov 1967–May 1968
7-Month
16.27"
(413.26mm)
16.96"
(430.78mm)
-0.69"
(-17.52mm)
45th Driest
Driest since:
1934
83rd Wettest
Wettest since:
1983
Ties: 2012
Oct 1967–May 1968
8-Month
18.61"
(472.69mm)
19.13"
(485.90mm)
-0.52"
(-13.21mm)
47th Driest
Driest since:
1934
81st Wettest
Wettest since:
2019
Sep 1967–May 1968
9-Month
21.10"
(535.94mm)
21.62"
(549.15mm)
-0.52"
(-13.21mm)
48th Driest
Driest since:
1934
80th Wettest
Wettest since:
2019
Aug 1967–May 1968
10-Month
23.61"
(599.69mm)
24.25"
(615.95mm)
-0.64"
(-16.26mm)
41st Driest
Driest since:
1918
87th Wettest
Wettest since:
2019
Jul 1967–May 1968
11-Month
26.50"
(673.10mm)
27.03"
(686.56mm)
-0.53"
(-13.46mm)
47th Driest
Driest since:
1931
81st Wettest
Wettest since:
2019
Jun 1967–May 1968
12-Month
30.08"
(764.03mm)
29.95"
(760.73mm)
0.13"
(3.30mm)
62nd Driest
Driest since:
1934
66th Wettest
Wettest since:
2019
Ties: 2007
Dec 1966–May 1968
18-Month
43.74"
(1,111.00mm)
44.70"
(1,135.38mm)
-0.96"
(-24.38mm)
42nd Driest
Driest since:
1931
85th Wettest
Wettest since:
2019
Jun 1966–May 1968
24-Month
57.62"
(1,463.55mm)
59.92"
(1,521.97mm)
-2.30"
(-58.42mm)
27th Driest
Driest since:
1931
100th Wettest
Wettest since:
2020
Ties: 1902
Jun 1965–May 1968
36-Month
86.57"
(2,198.88mm)
89.88"
(2,282.95mm)
-3.31"
(-84.07mm)
26th Driest
Driest since:
1955
100th Wettest
Wettest since:
2019
Jun 1964–May 1968
48-Month
116.36"
(2,955.54mm)
119.78"
(3,042.41mm)
-3.42"
(-86.87mm)
30th Driest
Driest since:
1956
95th Wettest
Wettest since:
2019
Jun 1963–May 1968
60-Month
143.99"
(3,657.35mm)
149.64"
(3,800.86mm)
-5.65"
(-143.51mm)
13th Driest
Driest since:
1957
111th Wettest
Wettest since:
2020

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