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, May 1966

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
May 1966
1-Month
3.33"
(84.58mm)
3.93"
(99.82mm)
-0.60"
(-15.24mm)
46th Driest
Driest since:
1964
83rd Wettest
Wettest since:
1989
Ties: 1981, 1992
Apr–May 1966
2-Month
6.69"
(169.93mm)
7.57"
(192.28mm)
-0.88"
(-22.35mm)
50th Driest
Driest since:
1926
79th Wettest
Wettest since:
2011
Mar–May 1966
3-Month
9.11"
(231.39mm)
11.06"
(280.92mm)
-1.95"
(-49.53mm)
26th Driest
Driest since:
1926
103rd Wettest
Wettest since:
2011
Feb–May 1966
4-Month
12.28"
(311.91mm)
13.66"
(346.96mm)
-1.38"
(-35.05mm)
39th Driest
Driest since:
1941
90th Wettest
Wettest since:
2011
Jan–May 1966
5-Month
15.73"
(399.54mm)
16.71"
(424.43mm)
-0.98"
(-24.89mm)
52nd Driest
Driest since:
1941
77th Wettest
Wettest since:
2011
Ties: 1982
Dec 1965–May 1966
6-Month
16.99"
(431.55mm)
19.81"
(503.17mm)
-2.82"
(-71.62mm)
20th Driest
Driest since:
1941
108th Wettest
Wettest since:
2011
Nov 1965–May 1966
7-Month
19.42"
(493.27mm)
23.02"
(584.71mm)
-3.60"
(-91.44mm)
13th Driest
Driest since:
1934
115th Wettest
Wettest since:
1952
Oct 1965–May 1966
8-Month
22.93"
(582.42mm)
26.19"
(665.23mm)
-3.26"
(-82.81mm)
23rd Driest
Driest since:
1925
105th Wettest
Wettest since:
2011
Sep 1965–May 1966
9-Month
26.43"
(671.32mm)
29.75"
(755.65mm)
-3.32"
(-84.33mm)
25th Driest
Driest since:
1941
103rd Wettest
Wettest since:
2019
Aug 1965–May 1966
10-Month
30.63"
(778.00mm)
33.62"
(853.95mm)
-2.99"
(-75.95mm)
30th Driest
Driest since:
1931
98th Wettest
Wettest since:
2019
Jul 1965–May 1966
11-Month
33.14"
(841.76mm)
37.82"
(960.63mm)
-4.68"
(-118.87mm)
17th Driest
Driest since:
1931
111th Wettest
Wettest since:
2019
Jun 1965–May 1966
12-Month
35.26"
(895.60mm)
41.97"
(1,066.04mm)
-6.71"
(-170.44mm)
10th Driest
Driest since:
1931
118th Wettest
Wettest since:
2019
Dec 1964–May 1966
18-Month
53.34"
(1,354.84mm)
61.76"
(1,568.70mm)
-8.42"
(-213.86mm)
8th Driest
Driest since:
1931
119th Wettest
Wettest since:
2019
Jun 1964–May 1966
24-Month
69.05"
(1,753.87mm)
83.91"
(2,131.31mm)
-14.86"
(-377.44mm)
2nd Driest
Driest since:
1931
125th Wettest
Wettest since:
2019
Jun 1963–May 1966
36-Month
105.63"
(2,683.00mm)
125.93"
(3,198.62mm)
-20.30"
(-515.62mm)
3rd Driest
Driest since:
1965
123rd Wettest
Wettest since:
2020
Jun 1962–May 1966
48-Month
140.41"
(3,566.41mm)
167.92"
(4,265.17mm)
-27.51"
(-698.76mm)
1st Driest
Driest since:
1966
124th Wettest
Wettest since:
2020
Jun 1961–May 1966
60-Month
178.40"
(4,531.36mm)
209.84"
(5,329.94mm)
-31.44"
(-798.58mm)
2nd Driest
Driest since:
1967
122nd Wettest
Wettest since:
2022

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