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 1999

View Period (Months):
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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 1999
1-Month
10.37"
(263.40mm)
3.60"
(91.44mm)
6.77"
(171.96mm)
127th Driest
Driest since:
1941
2nd Wettest
Wettest since:
1935
Aug–Sep 1999
2-Month
14.89"
(378.21mm)
8.19"
(208.03mm)
6.70"
(170.18mm)
125th Driest
Driest since:
2005
4th Wettest
Wettest since:
1928
Jul–Sep 1999
3-Month
17.10"
(434.34mm)
12.50"
(317.50mm)
4.60"
(116.84mm)
110th Driest
Driest since:
1968
19th Wettest
Wettest since:
1938
Jun–Sep 1999
4-Month
19.21"
(487.93mm)
16.14"
(409.96mm)
3.07"
(77.97mm)
96th Driest
Driest since:
1968
33rd Wettest
Wettest since:
1938
May–Sep 1999
5-Month
20.75"
(527.05mm)
19.70"
(500.38mm)
1.05"
(26.67mm)
80th Driest
Driest since:
1964
49th Wettest
Wettest since:
1989
Apr–Sep 1999
6-Month
23.63"
(600.20mm)
23.18"
(588.77mm)
0.45"
(11.43mm)
77th Driest
Driest since:
1986
52nd Wettest
Wettest since:
1989
Mar–Sep 1999
7-Month
28.39"
(721.11mm)
27.16"
(689.86mm)
1.23"
(31.25mm)
82nd Driest
Driest since:
1986
47th Wettest
Wettest since:
1989
Feb–Sep 1999
8-Month
31.12"
(790.45mm)
30.20"
(767.08mm)
0.92"
(23.37mm)
76th Driest
Driest since:
1930
53rd Wettest
Wettest since:
1989
Ties: 1931
Jan–Sep 1999
9-Month
36.96"
(938.78mm)
33.69"
(855.73mm)
3.27"
(83.05mm)
94th Driest
Driest since:
1930
35th Wettest
Wettest since:
1989
Dec 1998–Sep 1999
10-Month
39.71"
(1,008.63mm)
37.15"
(943.61mm)
2.56"
(65.02mm)
85th Driest
Driest since:
1986
43rd Wettest
Wettest since:
1958
Ties: 2014
Nov 1998–Sep 1999
11-Month
40.93"
(1,039.62mm)
40.22"
(1,021.59mm)
0.71"
(18.03mm)
69th Driest
Driest since:
1930
59th Wettest
Wettest since:
1958
Oct 1998–Sep 1999
12-Month
43.28"
(1,099.31mm)
43.37"
(1,101.60mm)
-0.09"
(-2.29mm)
65th Driest
Driest since:
1986
63rd Wettest
Wettest since:
2003
Apr 1998–Sep 1999
18-Month
61.63"
(1,565.40mm)
66.48"
(1,688.59mm)
-4.85"
(-123.19mm)
41st Driest
Driest since:
1966
87th Wettest
Wettest since:
2010
Oct 1997–Sep 1999
24-Month
90.72"
(2,304.29mm)
86.63"
(2,200.40mm)
4.09"
(103.89mm)
76th Driest
Driest since:
1966
51st Wettest
Wettest since:
2004
Oct 1996–Sep 1999
36-Month
134.07"
(3,405.38mm)
129.92"
(3,299.97mm)
4.15"
(105.41mm)
71st Driest
Driest since:
1966
55th Wettest
Wettest since:
1935
Oct 1995–Sep 1999
48-Month
190.09"
(4,828.29mm)
173.15"
(4,398.01mm)
16.94"
(430.28mm)
113th Driest
Driest since:
1966
12th Wettest
Wettest since:
1936
Oct 1994–Sep 1999
60-Month
222.02"
(5,639.31mm)
216.34"
(5,495.04mm)
5.68"
(144.27mm)
71st Driest
Driest since:
1966
53rd Wettest
Wettest since:
1937
Ties: 1981

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