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, April 1997

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 1997
1-Month
2.99"
(75.95mm)
2.52"
(64.01mm)
0.47"
(11.94mm)
107th Driest
Driest since:
1987
22nd Wettest
Wettest since:
1957
Mar–Apr 1997
2-Month
5.43"
(137.92mm)
5.03"
(127.76mm)
0.40"
(10.16mm)
94th Driest
Driest since:
1910
35th Wettest
Wettest since:
1973
Feb–Apr 1997
3-Month
7.82"
(198.63mm)
7.16"
(181.86mm)
0.66"
(16.77mm)
99th Driest
Driest since:
1910
30th Wettest
Wettest since:
1983
Jan–Apr 1997
4-Month
10.63"
(270.00mm)
9.47"
(240.54mm)
1.16"
(29.46mm)
113th Driest
Driest since:
1910
16th Wettest
Wettest since:
1998
Dec 1996–Apr 1997
5-Month
13.92"
(353.57mm)
11.82"
(300.23mm)
2.10"
(53.34mm)
119th Driest
Driest since:
1931
9th Wettest
Wettest since:
1983
Nov 1996–Apr 1997
6-Month
16.92"
(429.77mm)
14.05"
(356.87mm)
2.87"
(72.90mm)
121st Driest
Driest since:
1977
7th Wettest
Wettest since:
1983
Oct 1996–Apr 1997
7-Month
19.41"
(493.01mm)
16.22"
(411.99mm)
3.19"
(81.02mm)
122nd Driest
Driest since:
1981
6th Wettest
Wettest since:
1983
Sep 1996–Apr 1997
8-Month
22.85"
(580.39mm)
18.71"
(475.23mm)
4.14"
(105.16mm)
124th Driest
Driest since:
1918
4th Wettest
Wettest since:
2019
Aug 1996–Apr 1997
9-Month
25.51"
(647.95mm)
21.33"
(541.78mm)
4.18"
(106.17mm)
124th Driest
Driest since:
1918
4th Wettest
Wettest since:
2019
Jul 1996–Apr 1997
10-Month
28.63"
(727.20mm)
24.12"
(612.65mm)
4.51"
(114.55mm)
124th Driest
Driest since:
1931
4th Wettest
Wettest since:
2019
Jun 1996–Apr 1997
11-Month
31.50"
(800.10mm)
27.04"
(686.82mm)
4.46"
(113.28mm)
123rd Driest
Driest since:
1931
5th Wettest
Wettest since:
2019
May 1996–Apr 1997
12-Month
34.82"
(884.43mm)
29.95"
(760.73mm)
4.87"
(123.70mm)
123rd Driest
Driest since:
1918
5th Wettest
Wettest since:
2019
Nov 1995–Apr 1997
18-Month
48.95"
(1,243.33mm)
44.02"
(1,118.11mm)
4.93"
(125.22mm)
118th Driest
Driest since:
1931
9th Wettest
Wettest since:
2020
May 1995–Apr 1997
24-Month
66.42"
(1,687.07mm)
59.92"
(1,521.97mm)
6.50"
(165.10mm)
118th Driest
Driest since:
1955
9th Wettest
Wettest since:
2020
May 1994–Apr 1997
36-Month
98.07"
(2,490.98mm)
89.88"
(2,282.95mm)
8.19"
(208.03mm)
115th Driest
Driest since:
1955
11th Wettest
Wettest since:
2020
May 1993–Apr 1997
48-Month
129.11"
(3,279.39mm)
119.77"
(3,042.16mm)
9.34"
(237.23mm)
114th Driest
Driest since:
1956
11th Wettest
Wettest since:
2019
May 1992–Apr 1997
60-Month
162.55"
(4,128.77mm)
149.63"
(3,800.60mm)
12.92"
(328.17mm)
119th Driest
Driest since:
1957
5th Wettest
Wettest to Date
2020

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