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 1918

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 1918
1-Month
2.82"
(71.63mm)
2.52"
(64.01mm)
0.30"
(7.62mm)
92nd Driest
Driest since:
1987
37th Wettest
Wettest since:
1957
Ties: 1994
Mar–Apr 1918
2-Month
4.67"
(118.62mm)
5.03"
(127.76mm)
-0.36"
(-9.14mm)
43rd Driest
Driest since:
1910
86th Wettest
Wettest since:
1973
Ties: 2001
Feb–Apr 1918
3-Month
6.39"
(162.31mm)
7.16"
(181.86mm)
-0.77"
(-19.55mm)
20th Driest
Driest since:
1910
109th Wettest
Wettest since:
1983
Ties: 1946
Jan–Apr 1918
4-Month
8.80"
(223.52mm)
9.48"
(240.79mm)
-0.68"
(-17.27mm)
36th Driest
Driest since:
1910
93rd Wettest
Wettest since:
1998
Ties: 1966
Dec 1917–Apr 1918
5-Month
10.46"
(265.68mm)
11.82"
(300.23mm)
-1.36"
(-34.55mm)
14th Driest
Driest since:
1931
114th Wettest
Wettest since:
1983
Ties: 1985
Nov 1917–Apr 1918
6-Month
11.41"
(289.81mm)
14.05"
(356.87mm)
-2.64"
(-67.06mm)
5th Driest
Driest since:
1977
123rd Wettest
Wettest since:
1983
Oct 1917–Apr 1918
7-Month
12.79"
(324.87mm)
16.22"
(411.99mm)
-3.43"
(-87.12mm)
2nd Driest
Driest since:
1981
126th Wettest
Wettest since:
1983
Sep 1917–Apr 1918
8-Month
14.96"
(379.98mm)
18.71"
(475.23mm)
-3.75"
(-95.25mm)
1st Driest
Driest since:
1918
127th Wettest
Wettest since:
2019
Aug 1917–Apr 1918
9-Month
17.40"
(441.96mm)
21.33"
(541.78mm)
-3.93"
(-99.82mm)
1st Driest
Driest since:
1918
127th Wettest
Wettest since:
2019
Jul 1917–Apr 1918
10-Month
19.91"
(505.71mm)
24.12"
(612.65mm)
-4.21"
(-106.94mm)
2nd Driest
Driest since:
1931
126th Wettest
Wettest since:
2019
Jun 1917–Apr 1918
11-Month
22.35"
(567.69mm)
27.04"
(686.82mm)
-4.69"
(-119.13mm)
2nd Driest
Driest since:
1931
126th Wettest
Wettest since:
2019
May 1917–Apr 1918
12-Month
24.99"
(634.75mm)
29.95"
(760.73mm)
-4.96"
(-125.98mm)
1st Driest
Driest since:
1918
127th Wettest
Wettest since:
2019
Nov 1916–Apr 1918
18-Month
37.84"
(961.14mm)
44.02"
(1,118.11mm)
-6.18"
(-156.97mm)
2nd Driest
Driest since:
1931
125th Wettest
Wettest since:
2020
May 1916–Apr 1918
24-Month
53.79"
(1,366.27mm)
59.92"
(1,521.97mm)
-6.13"
(-155.70mm)
5th Driest
Driest since:
1955
122nd Wettest
Wettest since:
2020
May 1915–Apr 1918
36-Month
86.99"
(2,209.55mm)
89.88"
(2,282.95mm)
-2.89"
(-73.40mm)
34th Driest
Driest since:
1955
92nd Wettest
Wettest since:
2020
May 1914–Apr 1918
48-Month
115.99"
(2,946.15mm)
119.77"
(3,042.16mm)
-3.78"
(-96.01mm)
26th Driest
Driest since:
1956
99th Wettest
Wettest since:
2019
Ties: 1938
May 1913–Apr 1918
60-Month
145.18"
(3,687.57mm)
149.63"
(3,800.60mm)
-4.45"
(-113.03mm)
25th Driest
Driest since:
1957
99th Wettest
Wettest since:
2020
Ties: 2003

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