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, September 1977

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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1977
1-Month 		4.04"
(102.62mm)		 3.60"
(91.44mm)		 0.44"
(11.18mm)		 85th Driest
Driest since:
 1941
44th Wettest
Wettest since:
 1935
Aug–Sep 1977
2-Month 		7.79"
(197.87mm)		 8.19"
(208.03mm)		 -0.40"
(-10.16mm)		 63rd Driest
Driest since:
 2005
66th Wettest
Wettest since:
 1928
Jul–Sep 1977
3-Month 		9.96"
(252.98mm)		 12.50"
(317.50mm)		 -2.54"
(-64.52mm)		 38th Driest
Driest since:
 1968
91st Wettest
Wettest since:
 1938
Jun–Sep 1977
4-Month 		13.38"
(339.85mm)		 16.14"
(409.96mm)		 -2.76"
(-70.11mm)		 35th Driest
Driest since:
 1968
94th Wettest
Wettest since:
 1938
May–Sep 1977
5-Month 		15.06"
(382.52mm)		 19.70"
(500.38mm)		 -4.64"
(-117.86mm)		 17th Driest
Driest since:
 1964
112th Wettest
Wettest since:
 1989
Apr–Sep 1977
6-Month 		17.75"
(450.85mm)		 23.18"
(588.77mm)		 -5.43"
(-137.92mm)		 16th Driest
Driest since:
 1986
113th Wettest
Wettest since:
 1989
Mar–Sep 1977
7-Month 		20.34"
(516.64mm)		 27.16"
(689.86mm)		 -6.82"
(-173.22mm)		 12th Driest
Driest since:
 1986
117th Wettest
Wettest since:
 1989
Feb–Sep 1977
8-Month 		21.95"
(557.53mm)		 30.20"
(767.08mm)		 -8.25"
(-209.55mm)		 7th Driest
Driest since:
 1930
122nd Wettest
Wettest since:
 1989
Jan–Sep 1977
9-Month 		24.36"
(618.74mm)		 33.69"
(855.73mm)		 -9.33"
(-236.99mm)		 4th Driest
Driest since:
 1930
125th Wettest
Wettest since:
 1989
Dec 1976–Sep 1977
10-Month 		27.06"
(687.32mm)		 37.15"
(943.61mm)		 -10.09"
(-256.29mm)		 3rd Driest
Driest since:
 1986
125th Wettest
Wettest since:
 1958
Nov 1976–Sep 1977
11-Month 		28.06"
(712.72mm)		 40.22"
(1,021.59mm)		 -12.16"
(-308.87mm)		 2nd Driest
Driest since:
 1930
126th Wettest
Wettest since:
 1958
Oct 1976–Sep 1977
12-Month 		35.93"
(912.62mm)		 43.37"
(1,101.60mm)		 -7.44"
(-188.98mm)		 14th Driest
Driest since:
 1986
114th Wettest
Wettest since:
 2003
Apr 1976–Sep 1977
18-Month 		53.79"
(1,366.27mm)		 66.48"
(1,688.59mm)		 -12.69"
(-322.32mm)		 5th Driest
Driest since:
 1966
123rd Wettest
Wettest since:
 2010
Oct 1975–Sep 1977
24-Month 		72.40"
(1,838.96mm)		 86.63"
(2,200.40mm)		 -14.23"
(-361.44mm)		 7th Driest
Driest since:
 1966
120th Wettest
Wettest since:
 2004
Oct 1974–Sep 1977
36-Month 		124.40"
(3,159.76mm)		 129.92"
(3,299.97mm)		 -5.52"
(-140.21mm)		 34th Driest
Driest since:
 1966
92nd Wettest
Wettest since:
 1935
Oct 1973–Sep 1977
48-Month 		165.85"
(4,212.59mm)		 173.15"
(4,398.01mm)		 -7.30"
(-185.42mm)		 28th Driest
Driest since:
 1966
97th Wettest
Wettest since:
 1936
Oct 1972–Sep 1977
60-Month 		216.88"
(5,508.75mm)		 216.34"
(5,495.04mm)		 0.54"
(13.71mm)		 52nd Driest
Driest since:
 1966
72nd Wettest
Wettest since:
 1937

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