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.

Pennsylvania

Precipitation Rankings, April 2018

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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
April 2018
1-Month
4.17"
(105.92mm)
3.64"
(92.46mm)
0.53"
(13.46mm)
90th Driest
Driest since:
1946
39th Wettest
Wettest since:
2011
Ties: 1958, 1972
Mar–Apr 2018
2-Month
7.29"
(185.17mm)
7.14"
(181.36mm)
0.15"
(3.81mm)
72nd Driest
Driest since:
1915
57th Wettest
Wettest since:
2011
Feb–Apr 2018
3-Month
12.69"
(322.33mm)
9.73"
(247.14mm)
2.96"
(75.19mm)
119th Driest
Driest since:
1941
10th Wettest
Wettest since:
2011
Jan–Apr 2018
4-Month
15.97"
(405.64mm)
12.78"
(324.61mm)
3.19"
(81.03mm)
117th Driest
Driest since:
1941
12th Wettest
Wettest since:
2011
Ties: 1908
Dec 2017–Apr 2018
5-Month
17.67"
(448.82mm)
15.88"
(403.35mm)
1.79"
(45.47mm)
93rd Driest
Driest since:
1941
35th Wettest
Wettest since:
2011
Nov 2017–Apr 2018
6-Month
20.56"
(522.22mm)
19.09"
(484.89mm)
1.47"
(37.33mm)
92nd Driest
Driest since:
1931
36th Wettest
Wettest since:
1952
Oct 2017–Apr 2018
7-Month
25.65"
(651.51mm)
22.27"
(565.66mm)
3.38"
(85.85mm)
106th Driest
Driest since:
1925
22nd Wettest
Wettest since:
2011
Sep 2017–Apr 2018
8-Month
27.71"
(703.83mm)
25.83"
(656.08mm)
1.88"
(47.75mm)
89th Driest
Driest since:
1931
39th Wettest
Wettest since:
2019
Aug 2017–Apr 2018
9-Month
31.55"
(801.37mm)
29.69"
(754.13mm)
1.86"
(47.24mm)
85th Driest
Driest since:
1931
43rd Wettest
Wettest since:
2019
Jul 2017–Apr 2018
10-Month
37.69"
(957.33mm)
33.89"
(860.81mm)
3.80"
(96.52mm)
100th Driest
Driest since:
1931
28th Wettest
Wettest since:
2019
Jun 2017–Apr 2018
11-Month
42.31"
(1,074.67mm)
38.05"
(966.47mm)
4.26"
(108.20mm)
101st Driest
Driest since:
1931
27th Wettest
Wettest since:
2019
Ties: 1943
May 2017–Apr 2018
12-Month
48.26"
(1,225.80mm)
41.95"
(1,065.53mm)
6.31"
(160.27mm)
114th Driest
Driest since:
1931
14th Wettest
Wettest since:
2019
Nov 2016–Apr 2018
18-Month
67.69"
(1,719.33mm)
61.03"
(1,550.16mm)
6.66"
(169.17mm)
108th Driest
Driest since:
1931
19th Wettest
Wettest since:
2019
Ties: 1899
May 2016–Apr 2018
24-Month
90.66"
(2,302.76mm)
83.91"
(2,131.31mm)
6.75"
(171.45mm)
100th Driest
Driest since:
1966
27th Wettest
Wettest since:
2020
May 2015–Apr 2018
36-Month
133.67"
(3,395.22mm)
125.93"
(3,198.62mm)
7.74"
(196.60mm)
92nd Driest
Driest since:
1967
34th Wettest
Wettest since:
2020
May 2014–Apr 2018
48-Month
175.10"
(4,447.54mm)
167.93"
(4,265.42mm)
7.17"
(182.12mm)
86th Driest
Driest since:
1966
39th Wettest
Wettest since:
2020
May 2013–Apr 2018
60-Month
218.82"
(5,558.03mm)
209.83"
(5,329.68mm)
8.99"
(228.35mm)
92nd Driest
Driest since:
1967
32nd Wettest
Wettest since:
2022

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