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 2019

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
May 2019
1-Month 		4.48"
(113.79mm)		 3.56"
(90.42mm)		 0.92"
(23.37mm)		 94th Driest
Driest since:
 1964
35th Wettest
Wettest since:
 1948
Apr–May 2019
2-Month 		8.05"
(204.47mm)		 7.04"
(178.82mm)		 1.01"
(25.65mm)		 90th Driest
Driest since:
 1942
39th Wettest
Wettest since:
 1948
Ties: 1971, 1975
Mar–May 2019
3-Month 		11.64"
(295.66mm)		 11.01"
(279.65mm)		 0.63"
(16.01mm)		 86th Driest
Driest since:
 1986
43rd Wettest
Wettest since:
 1983
Ties: 1909
Feb–May 2019
4-Month 		15.11"
(383.79mm)		 14.06"
(357.12mm)		 1.05"
(26.67mm)		 89th Driest
Driest since:
 2006
40th Wettest
Wettest since:
 1983
Jan–May 2019
5-Month 		18.56"
(471.42mm)		 17.55"
(445.77mm)		 1.01"
(25.65mm)		 88th Driest
Driest since:
 2012
41st Wettest
Wettest since:
 1948
Dec 2018–May 2019
6-Month 		23.38"
(593.85mm)		 21.01"
(533.65mm)		 2.37"
(60.20mm)		 95th Driest
Driest since:
 1986
33rd Wettest
Wettest since:
 1984
Ties: 1987
Nov 2018–May 2019
7-Month 		30.23"
(767.84mm)		 24.08"
(611.63mm)		 6.15"
(156.21mm)		 116th Driest
Driest since:
 1977
12th Wettest
Wettest since:
 1984
Oct 2018–May 2019
8-Month 		35.27"
(895.86mm)		 27.23"
(691.64mm)		 8.04"
(204.22mm)		 117th Driest
Driest since:
 2002
11th Wettest
Wettest since:
 1984
Sep 2018–May 2019
9-Month 		41.88"
(1,063.75mm)		 30.82"
(782.83mm)		 11.06"
(280.92mm)		 123rd Driest
Driest since:
 2002
5th Wettest
Wettest since:
 1984
Aug 2018–May 2019
10-Month 		46.41"
(1,178.81mm)		 35.41"
(899.41mm)		 11.00"
(279.40mm)		 123rd Driest
Driest since:
 1985
5th Wettest
Wettest since:
 2010
Jul 2018–May 2019
11-Month 		52.18"
(1,325.37mm)		 39.69"
(1,008.13mm)		 12.49"
(317.24mm)		 126th Driest
Driest since:
 1931
2nd Wettest
Wettest to Date
 2021
Jun 2018–May 2019
12-Month 		56.15"
(1,426.21mm)		 43.32"
(1,100.33mm)		 12.83"
(325.88mm)		 125th Driest
Driest since:
 1965
3rd Wettest
Wettest since:
 2010
Dec 2017–May 2019
18-Month 		79.63"
(2,022.60mm)		 64.29"
(1,632.97mm)		 15.34"
(389.63mm)		 124th Driest
Driest since:
 1931
3rd Wettest
Wettest since:
 1949
Jun 2017–May 2019
24-Month 		106.10"
(2,694.94mm)		 86.54"
(2,198.12mm)		 19.56"
(496.82mm)		 126th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
Jun 2016–May 2019
36-Month 		151.98"
(3,860.29mm)		 129.85"
(3,298.19mm)		 22.13"
(562.10mm)		 122nd Driest
Driest since:
 1967
4th Wettest
Wettest since:
 2005
Jun 2015–May 2019
48-Month 		198.61"
(5,044.69mm)		 173.12"
(4,397.25mm)		 25.49"
(647.44mm)		 121st Driest
Driest since:
 1966
4th Wettest
Wettest since:
 1939
Jun 2014–May 2019
60-Month 		241.09"
(6,123.69mm)		 216.25"
(5,492.75mm)		 24.84"
(630.94mm)		 115th Driest
Driest since:
 1967
9th Wettest
Wettest since:
 1939

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