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 1927

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1927
1-Month
2.99"
(75.95mm)
2.91"
(73.91mm)
0.08"
(2.04mm)
72nd Driest
Driest since:
1934
57th Wettest
Wettest since:
2019
Ties: 2021
Apr–May 1927
2-Month
6.04"
(153.42mm)
5.43"
(137.92mm)
0.61"
(15.50mm)
101st Driest
Driest since:
1934
28th Wettest
Wettest since:
1957
Mar–May 1927
3-Month
8.63"
(219.20mm)
7.94"
(201.68mm)
0.69"
(17.52mm)
100th Driest
Driest since:
1925
29th Wettest
Wettest since:
1957, 1991
Feb–May 1927
4-Month
11.35"
(288.29mm)
10.07"
(255.78mm)
1.28"
(32.51mm)
109th Driest
Driest since:
1925
20th Wettest
Wettest since:
2019
Jan–May 1927
5-Month
13.12"
(333.25mm)
12.39"
(314.71mm)
0.73"
(18.54mm)
96th Driest
Driest since:
1934
33rd Wettest
Wettest since:
2019
Dec 1926–May 1927
6-Month
15.79"
(401.07mm)
14.73"
(374.14mm)
1.06"
(26.93mm)
100th Driest
Driest since:
1931
28th Wettest
Wettest since:
2019
Nov 1926–May 1927
7-Month
18.66"
(473.96mm)
16.96"
(430.78mm)
1.70"
(43.18mm)
109th Driest
Driest since:
1934
19th Wettest
Wettest since:
1983
Oct 1926–May 1927
8-Month
21.15"
(537.21mm)
19.13"
(485.90mm)
2.02"
(51.31mm)
108th Driest
Driest since:
1934
20th Wettest
Wettest since:
2019
Sep 1926–May 1927
9-Month
24.38"
(619.25mm)
21.62"
(549.15mm)
2.76"
(70.10mm)
117th Driest
Driest since:
1934
11th Wettest
Wettest to Date
2019
Ties: 1978
Aug 1926–May 1927
10-Month
27.60"
(701.04mm)
24.25"
(615.95mm)
3.35"
(85.09mm)
120th Driest
Driest since:
1918
8th Wettest
Wettest to Date
2019
Jul 1926–May 1927
11-Month
30.46"
(773.68mm)
27.03"
(686.56mm)
3.43"
(87.12mm)
119th Driest
Driest since:
1931
9th Wettest
Wettest to Date
2019
Jun 1926–May 1927
12-Month
32.95"
(836.93mm)
29.95"
(760.73mm)
3.00"
(76.20mm)
114th Driest
Driest since:
1934
14th Wettest
Wettest to Date
2019
Dec 1925–May 1927
18-Month
45.72"
(1,161.29mm)
44.70"
(1,135.38mm)
1.02"
(25.91mm)
80th Driest
Driest since:
1931
47th Wettest
Wettest since:
2019
Ties: 1947
Jun 1925–May 1927
24-Month
61.37"
(1,558.80mm)
59.92"
(1,521.97mm)
1.45"
(36.83mm)
84th Driest
Driest since:
1931
43rd Wettest
Wettest since:
2020
Ties: 1992
Jun 1924–May 1927
36-Month
86.81"
(2,204.97mm)
89.88"
(2,282.95mm)
-3.07"
(-77.98mm)
29th Driest
Driest since:
1955
97th Wettest
Wettest since:
2019
Jun 1923–May 1927
48-Month
116.53"
(2,959.86mm)
119.78"
(3,042.41mm)
-3.25"
(-82.55mm)
33rd Driest
Driest since:
1956
92nd Wettest
Wettest since:
2019
Jun 1922–May 1927
60-Month
144.99"
(3,682.75mm)
149.64"
(3,800.86mm)
-4.65"
(-118.11mm)
23rd Driest
Driest since:
1957
101st Wettest
Wettest since:
2020

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