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 1990

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 1990
1-Month
2.11"
(53.59mm)
3.60"
(91.44mm)
-1.49"
(-37.85mm)
27th Driest
Driest since:
1941
102nd Wettest
Wettest since:
1935
Aug–Sep 1990
2-Month
7.54"
(191.52mm)
8.19"
(208.03mm)
-0.65"
(-16.51mm)
55th Driest
Driest since:
2005
74th Wettest
Wettest since:
1928
Jul–Sep 1990
3-Month
12.55"
(318.77mm)
12.51"
(317.75mm)
0.04"
(1.02mm)
71st Driest
Driest since:
1968
58th Wettest
Wettest since:
1938
Jun–Sep 1990
4-Month
14.52"
(368.81mm)
16.14"
(409.96mm)
-1.62"
(-41.15mm)
52nd Driest
Driest since:
1968
77th Wettest
Wettest since:
1938
May–Sep 1990
5-Month
21.98"
(558.29mm)
19.70"
(500.38mm)
2.28"
(57.91mm)
91st Driest
Driest since:
1964
38th Wettest
Wettest since:
1989
Ties: 1937
Apr–Sep 1990
6-Month
25.82"
(655.83mm)
23.18"
(588.77mm)
2.64"
(67.06mm)
92nd Driest
Driest since:
1986
37th Wettest
Wettest since:
1989
Ties: 1972
Mar–Sep 1990
7-Month
29.12"
(739.65mm)
27.16"
(689.86mm)
1.96"
(49.79mm)
88th Driest
Driest since:
1986
41st Wettest
Wettest since:
1989
Feb–Sep 1990
8-Month
31.06"
(788.92mm)
30.20"
(767.08mm)
0.86"
(21.84mm)
74th Driest
Driest since:
1930
55th Wettest
Wettest since:
1989
Jan–Sep 1990
9-Month
34.69"
(881.13mm)
33.69"
(855.73mm)
1.00"
(25.40mm)
75th Driest
Driest since:
1930
54th Wettest
Wettest since:
1989
Ties: 1915
Dec 1989–Sep 1990
10-Month
36.10"
(916.94mm)
37.15"
(943.61mm)
-1.05"
(-26.67mm)
52nd Driest
Driest since:
1986
76th Wettest
Wettest since:
1958
Nov 1989–Sep 1990
11-Month
39.07"
(992.38mm)
40.22"
(1,021.59mm)
-1.15"
(-29.21mm)
59th Driest
Driest since:
1930
69th Wettest
Wettest since:
1958
Oct 1989–Sep 1990
12-Month
43.06"
(1,093.72mm)
43.37"
(1,101.60mm)
-0.31"
(-7.88mm)
62nd Driest
Driest since:
1986
66th Wettest
Wettest since:
2003
Apr 1989–Sep 1990
18-Month
79.10"
(2,009.14mm)
66.48"
(1,688.59mm)
12.62"
(320.55mm)
116th Driest
Driest since:
1966
12th Wettest
Wettest since:
2010
Oct 1988–Sep 1990
24-Month
99.63"
(2,530.60mm)
86.63"
(2,200.40mm)
13.00"
(330.20mm)
116th Driest
Driest since:
1966
11th Wettest
Wettest since:
2004
Oct 1987–Sep 1990
36-Month
139.06"
(3,532.12mm)
129.92"
(3,299.97mm)
9.14"
(232.15mm)
94th Driest
Driest since:
1966
32nd Wettest
Wettest since:
1935
Oct 1986–Sep 1990
48-Month
180.68"
(4,589.27mm)
173.15"
(4,398.01mm)
7.53"
(191.26mm)
81st Driest
Driest since:
1966
44th Wettest
Wettest since:
1936
Oct 1985–Sep 1990
60-Month
210.93"
(5,357.62mm)
216.34"
(5,495.04mm)
-5.41"
(-137.42mm)
33rd Driest
Driest since:
1966
91st Wettest
Wettest since:
1937

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