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 1978

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
April 1978
1-Month
2.26"
(57.40mm)
3.64"
(92.46mm)
-1.38"
(-35.06mm)
18th Driest
Driest since:
1946
111th Wettest
Wettest since:
2011
Mar–Apr 1978
2-Month
4.89"
(124.21mm)
7.13"
(181.10mm)
-2.24"
(-56.89mm)
11th Driest
Driest since:
1915
118th Wettest
Wettest since:
2011
Feb–Apr 1978
3-Month
5.91"
(150.11mm)
9.73"
(247.14mm)
-3.82"
(-97.03mm)
2nd Driest
Driest since:
1941
127th Wettest
Wettest since:
2011
Jan–Apr 1978
4-Month
12.42"
(315.47mm)
12.78"
(324.61mm)
-0.36"
(-9.14mm)
64th Driest
Driest since:
1941
65th Wettest
Wettest since:
2011
Dec 1977–Apr 1978
5-Month
17.01"
(432.05mm)
15.88"
(403.35mm)
1.13"
(28.70mm)
86th Driest
Driest since:
1941
42nd Wettest
Wettest since:
2011
Ties: 1912
Nov 1977–Apr 1978
6-Month
21.46"
(545.08mm)
19.09"
(484.89mm)
2.37"
(60.19mm)
101st Driest
Driest since:
1931
27th Wettest
Wettest since:
1952
Oct 1977–Apr 1978
7-Month
25.58"
(649.73mm)
22.26"
(565.40mm)
3.32"
(84.33mm)
105th Driest
Driest since:
1925
23rd Wettest
Wettest since:
2011
Sep 1977–Apr 1978
8-Month
30.86"
(783.84mm)
25.83"
(656.08mm)
5.03"
(127.76mm)
112th Driest
Driest since:
1931
16th Wettest
Wettest since:
2019
Aug 1977–Apr 1978
9-Month
35.18"
(893.57mm)
29.69"
(754.13mm)
5.49"
(139.44mm)
111th Driest
Driest since:
1931
17th Wettest
Wettest since:
2019
Jul 1977–Apr 1978
10-Month
40.75"
(1,035.05mm)
33.89"
(860.81mm)
6.86"
(174.24mm)
119th Driest
Driest since:
1931
9th Wettest
Wettest since:
2019
Jun 1977–Apr 1978
11-Month
44.84"
(1,138.94mm)
38.05"
(966.47mm)
6.79"
(172.47mm)
117th Driest
Driest since:
1931
11th Wettest
Wettest since:
2019
May 1977–Apr 1978
12-Month
46.53"
(1,181.86mm)
41.95"
(1,065.53mm)
4.58"
(116.33mm)
105th Driest
Driest since:
1931
23rd Wettest
Wettest since:
2019
Nov 1976–Apr 1978
18-Month
62.07"
(1,576.58mm)
61.03"
(1,550.16mm)
1.04"
(26.42mm)
71st Driest
Driest since:
1931
56th Wettest
Wettest since:
2019
May 1976–Apr 1978
24-Month
89.13"
(2,263.90mm)
83.91"
(2,131.31mm)
5.22"
(132.59mm)
95th Driest
Driest since:
1966
32nd Wettest
Wettest since:
2020
May 1975–Apr 1978
36-Month
137.26"
(3,486.40mm)
125.93"
(3,198.62mm)
11.33"
(287.78mm)
107th Driest
Driest since:
1967
19th Wettest
Wettest since:
2020
May 1974–Apr 1978
48-Month
181.43"
(4,608.32mm)
167.93"
(4,265.42mm)
13.50"
(342.90mm)
108th Driest
Driest since:
1966
17th Wettest
Wettest since:
2020
May 1973–Apr 1978
60-Month
226.71"
(5,758.43mm)
209.83"
(5,329.68mm)
16.88"
(428.75mm)
102nd Driest
Driest since:
1967
22nd Wettest
Wettest since:
2022

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