Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Delaware

Precipitation Rankings, May 1939

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1939
1-Month
0.73"
(18.54mm)
3.56"
(90.42mm)
-2.83"
(-71.88mm)
3rd Driest
Driest since:
1964
126th Wettest
Wettest since:
1948
Apr–May 1939
2-Month
6.49"
(164.85mm)
7.04"
(178.82mm)
-0.55"
(-13.97mm)
53rd Driest
Driest since:
1942
76th Wettest
Wettest since:
1948
Ties: 1949
Mar–May 1939
3-Month
11.72"
(297.69mm)
11.01"
(279.65mm)
0.71"
(18.04mm)
87th Driest
Driest since:
1986
42nd Wettest
Wettest since:
1983
Feb–May 1939
4-Month
17.21"
(437.13mm)
14.06"
(357.12mm)
3.15"
(80.01mm)
112th Driest
Driest since:
2006
17th Wettest
Wettest since:
1983
Jan–May 1939
5-Month
20.97"
(532.64mm)
17.55"
(445.77mm)
3.42"
(86.87mm)
110th Driest
Driest since:
2012
19th Wettest
Wettest since:
1948
Ties: 1936
Dec 1938–May 1939
6-Month
23.76"
(603.50mm)
21.01"
(533.65mm)
2.75"
(69.85mm)
100th Driest
Driest since:
1986
28th Wettest
Wettest since:
1984
Ties: 1923
Nov 1938–May 1939
7-Month
27.02"
(686.31mm)
24.08"
(611.63mm)
2.94"
(74.68mm)
99th Driest
Driest since:
1977
29th Wettest
Wettest since:
1984
Oct 1938–May 1939
8-Month
29.54"
(750.32mm)
27.23"
(691.64mm)
2.31"
(58.68mm)
95th Driest
Driest since:
2002
33rd Wettest
Wettest since:
1984
Sep 1938–May 1939
9-Month
37.39"
(949.71mm)
30.82"
(782.83mm)
6.57"
(166.88mm)
110th Driest
Driest since:
2002
18th Wettest
Wettest since:
1984
Aug 1938–May 1939
10-Month
40.41"
(1,026.41mm)
35.41"
(899.41mm)
5.00"
(127.00mm)
101st Driest
Driest since:
1985
27th Wettest
Wettest since:
2010
Jul 1938–May 1939
11-Month
51.13"
(1,298.70mm)
39.69"
(1,008.13mm)
11.44"
(290.57mm)
124th Driest
Driest since:
1931
4th Wettest
Wettest to Date
2021
Jun 1938–May 1939
12-Month
56.05"
(1,423.67mm)
43.32"
(1,100.33mm)
12.73"
(323.34mm)
124th Driest
Driest since:
1965
4th Wettest
Wettest to Date
2010
Dec 1937–May 1939
18-Month
71.87"
(1,825.50mm)
64.29"
(1,632.97mm)
7.58"
(192.53mm)
103rd Driest
Driest since:
1931
24th Wettest
Wettest since:
1949
Jun 1937–May 1939
24-Month
100.34"
(2,548.64mm)
86.54"
(2,198.12mm)
13.80"
(350.52mm)
114th Driest
Driest since:
1931
13th Wettest
Wettest since:
2019
Jun 1936–May 1939
36-Month
149.95"
(3,808.73mm)
129.85"
(3,298.19mm)
20.10"
(510.54mm)
120th Driest
Driest since:
1967
6th Wettest
Wettest since:
2005
Jun 1935–May 1939
48-Month
205.94"
(5,230.88mm)
173.12"
(4,397.25mm)
32.82"
(833.63mm)
124th Driest
Driest since:
1966
1st Wettest
Wettest to Date
1939
Jun 1934–May 1939
60-Month
252.05"
(6,402.07mm)
216.25"
(5,492.75mm)
35.80"
(909.32mm)
123rd Driest
Driest since:
1967
1st Wettest
Wettest to Date
1939

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