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 2017

View Period (Months):
Download: csv json xml
  • Record Driest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 2017
1-Month
3.36"
(85.34mm)
2.91"
(73.91mm)
0.45"
(11.43mm)
108th Driest
Driest since:
1934
21st Wettest
Wettest since:
2019
Apr–May 2017
2-Month
6.86"
(174.24mm)
5.43"
(137.92mm)
1.43"
(36.32mm)
123rd Driest
Driest since:
1934
6th Wettest
Wettest since:
1957
Mar–May 2017
3-Month
9.45"
(240.03mm)
7.94"
(201.68mm)
1.51"
(38.35mm)
118th Driest
Driest since:
1925
11th Wettest
Wettest since:
1957, 1991
Feb–May 2017
4-Month
11.70"
(297.18mm)
10.07"
(255.78mm)
1.63"
(41.40mm)
114th Driest
Driest since:
1925
15th Wettest
Wettest since:
2019
Ties: 1979
Jan–May 2017
5-Month
14.94"
(379.48mm)
12.39"
(314.71mm)
2.55"
(64.77mm)
124th Driest
Driest since:
1934
5th Wettest
Wettest since:
2019
Dec 2016–May 2017
6-Month
17.66"
(448.56mm)
14.73"
(374.14mm)
2.93"
(74.42mm)
124th Driest
Driest since:
1931
4th Wettest
Wettest since:
2019
Nov 2016–May 2017
7-Month
19.41"
(493.01mm)
16.96"
(430.78mm)
2.45"
(62.23mm)
117th Driest
Driest since:
1934
11th Wettest
Wettest since:
1983
Oct 2016–May 2017
8-Month
21.80"
(553.72mm)
19.13"
(485.90mm)
2.67"
(67.82mm)
117th Driest
Driest since:
1934
11th Wettest
Wettest since:
2019
Sep 2016–May 2017
9-Month
24.53"
(623.06mm)
21.62"
(549.15mm)
2.91"
(73.91mm)
118th Driest
Driest since:
1934
10th Wettest
Wettest since:
2019
Aug 2016–May 2017
10-Month
28.00"
(711.20mm)
24.25"
(615.95mm)
3.75"
(95.25mm)
123rd Driest
Driest since:
1918
5th Wettest
Wettest since:
2019
Jul 2016–May 2017
11-Month
30.92"
(785.37mm)
27.03"
(686.56mm)
3.89"
(98.81mm)
122nd Driest
Driest since:
1931
6th Wettest
Wettest since:
2019
Jun 2016–May 2017
12-Month
33.40"
(848.36mm)
29.95"
(760.73mm)
3.45"
(87.63mm)
119th Driest
Driest since:
1934
9th Wettest
Wettest since:
2019
Dec 2015–May 2017
18-Month
50.42"
(1,280.67mm)
44.70"
(1,135.38mm)
5.72"
(145.29mm)
121st Driest
Driest since:
1931
6th Wettest
Wettest since:
2019
Jun 2015–May 2017
24-Month
67.98"
(1,726.69mm)
59.92"
(1,521.97mm)
8.06"
(204.72mm)
124th Driest
Driest since:
1931
3rd Wettest
Wettest since:
2020
Jun 2014–May 2017
36-Month
100.12"
(2,543.05mm)
89.88"
(2,282.95mm)
10.24"
(260.10mm)
122nd Driest
Driest since:
1955
4th Wettest
Wettest since:
2019
Jun 2013–May 2017
48-Month
130.50"
(3,314.70mm)
119.78"
(3,042.41mm)
10.72"
(272.29mm)
120th Driest
Driest since:
1956
5th Wettest
Wettest since:
2019
Jun 2012–May 2017
60-Month
158.85"
(4,034.79mm)
149.64"
(3,800.86mm)
9.21"
(233.93mm)
110th Driest
Driest since:
1957
14th Wettest
Wettest since:
2020

Citing This Page