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 1991

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 1991
1-Month
3.72"
(94.49mm)
2.91"
(73.91mm)
0.81"
(20.58mm)
119th Driest
Driest since:
1934
10th Wettest
Wettest since:
2019
Ties: 1935
Apr–May 1991
2-Month
7.07"
(179.58mm)
5.43"
(137.92mm)
1.64"
(41.66mm)
125th Driest
Driest since:
1934
4th Wettest
Wettest since:
1957
Mar–May 1991
3-Month
10.40"
(264.16mm)
7.94"
(201.68mm)
2.46"
(62.48mm)
128th Driest
Driest since:
1925
1st Wettest
Wettest since:
1957, 1991
Ties: 1957
Feb–May 1991
4-Month
12.04"
(305.82mm)
10.07"
(255.78mm)
1.97"
(50.04mm)
123rd Driest
Driest since:
1925
6th Wettest
Wettest since:
2019
Jan–May 1991
5-Month
14.41"
(366.01mm)
12.39"
(314.71mm)
2.02"
(51.30mm)
118th Driest
Driest since:
1934
11th Wettest
Wettest since:
2019
Dec 1990–May 1991
6-Month
17.10"
(434.34mm)
14.73"
(374.14mm)
2.37"
(60.20mm)
121st Driest
Driest since:
1931
7th Wettest
Wettest since:
2019
Nov 1990–May 1991
7-Month
19.19"
(487.43mm)
16.96"
(430.78mm)
2.23"
(56.65mm)
114th Driest
Driest since:
1934
14th Wettest
Wettest since:
1983
Oct 1990–May 1991
8-Month
21.95"
(557.53mm)
19.13"
(485.90mm)
2.82"
(71.63mm)
119th Driest
Driest since:
1934
9th Wettest
Wettest since:
2019
Sep 1990–May 1991
9-Month
23.99"
(609.35mm)
21.62"
(549.15mm)
2.37"
(60.20mm)
112th Driest
Driest since:
1934
16th Wettest
Wettest since:
2019
Aug 1990–May 1991
10-Month
26.64"
(676.66mm)
24.25"
(615.95mm)
2.39"
(60.71mm)
110th Driest
Driest since:
1918
18th Wettest
Wettest since:
2019
Jul 1990–May 1991
11-Month
29.58"
(751.33mm)
27.03"
(686.56mm)
2.55"
(64.77mm)
111th Driest
Driest since:
1931
17th Wettest
Wettest since:
2019
Jun 1990–May 1991
12-Month
32.08"
(814.83mm)
29.95"
(760.73mm)
2.13"
(54.10mm)
101st Driest
Driest since:
1934
27th Wettest
Wettest since:
2019
Dec 1989–May 1991
18-Month
47.92"
(1,217.17mm)
44.70"
(1,135.38mm)
3.22"
(81.79mm)
108th Driest
Driest since:
1931
19th Wettest
Wettest since:
2019
Jun 1989–May 1991
24-Month
63.61"
(1,615.69mm)
59.92"
(1,521.97mm)
3.69"
(93.72mm)
105th Driest
Driest since:
1931
22nd Wettest
Wettest since:
2020
Jun 1988–May 1991
36-Month
91.61"
(2,326.89mm)
89.88"
(2,282.95mm)
1.73"
(43.94mm)
81st Driest
Driest since:
1955
45th Wettest
Wettest since:
2019
Jun 1987–May 1991
48-Month
118.67"
(3,014.22mm)
119.78"
(3,042.41mm)
-1.11"
(-28.19mm)
49th Driest
Driest since:
1956
76th Wettest
Wettest since:
2019
Jun 1986–May 1991
60-Month
150.48"
(3,822.19mm)
149.64"
(3,800.86mm)
0.84"
(21.33mm)
63rd Driest
Driest since:
1957
61st Wettest
Wettest since:
2020

Citing This Page