Climate at a Glance

Statewide Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of September 2021. For more information, please see Climatological Rankings.


Pennsylvania

Precipitation Rankings, May 2021

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
May 2021
1-Month
4.28"
(108.71mm)
3.93"
(99.82mm)
0.35"
(8.89mm)
78th Driest Driest since: 2020 1964
50th Wettest Wettest since: 2019 1989
Apr–May 2021
2-Month
7.08"
(179.83mm)
7.57"
(192.28mm)
-0.49"
(-12.45mm)
55th Driest Driest since: 2016 1926
73rd Wettest Wettest since: 2020 2011
Mar–May 2021
3-Month
9.90"
(251.46mm)
11.06"
(280.92mm)
-1.16"
(-29.46mm)
41st Driest Driest since: 2016 1926
87th Wettest Wettest since: 2020 2011
Ties: 2010
Feb–May 2021
4-Month
12.91"
(327.91mm)
13.66"
(346.96mm)
-0.75"
(-19.05mm)
55th Driest Driest since: 2016 1941
73rd Wettest Wettest since: 2020 2011
Jan–May 2021
5-Month
14.71"
(373.63mm)
16.71"
(424.43mm)
-2.00"
(-50.80mm)
31st Driest Driest since: 2015 1941
97th Wettest Wettest since: 2020 2011
Dec 2020–May 2021
6-Month
19.15"
(486.41mm)
19.81"
(503.17mm)
-0.66"
(-16.76mm)
53rd Driest Driest since: 2016 1941
74th Wettest Wettest since: 2020 2011
Nov 2020–May 2021
7-Month
22.12"
(561.85mm)
23.02"
(584.71mm)
-0.90"
(-22.86mm)
53rd Driest Driest since: 2016 1934
74th Wettest Wettest since: 2020 1952
Oct 2020–May 2021
8-Month
25.75"
(654.05mm)
26.19"
(665.23mm)
-0.44"
(-11.18mm)
57th Driest Driest since: 2016 1925
70th Wettest Wettest since: 2020 2011
Sep 2020–May 2021
9-Month
28.21"
(716.53mm)
29.75"
(755.65mm)
-1.54"
(-39.12mm)
39th Driest Driest since: 2015 1941
88th Wettest Wettest since: 2020 2019
Aug 2020–May 2021
10-Month
32.60"
(828.04mm)
33.62"
(853.95mm)
-1.02"
(-25.91mm)
49th Driest Driest since: 2016 1931
78th Wettest Wettest since: 2020 2019
Jul 2020–May 2021
11-Month
36.17"
(918.72mm)
37.82"
(960.63mm)
-1.65"
(-41.91mm)
42nd Driest Driest since: 2016 1931
85th Wettest Wettest since: 2020 2019
Jun 2020–May 2021
12-Month
39.34"
(999.24mm)
41.97"
(1,066.04mm)
-2.63"
(-66.80mm)
33rd Driest Driest since: 2015 1931
94th Wettest Wettest since: 2020 2019
Dec 2019–May 2021
18-Month
61.70"
(1,567.18mm)
61.76"
(1,568.70mm)
-0.06"
(-1.52mm)
60th Driest Driest since: 2016 1931
66th Wettest Wettest since: 2020 2019
Jun 2019–May 2021
24-Month
87.03"
(2,210.56mm)
83.91"
(2,131.31mm)
3.12"
(79.25mm)
77th Driest Driest since: 2016 1931
49th Wettest Wettest since: 2020 2019
Jun 2018–May 2021
36-Month
151.36"
(3,844.54mm)
125.93"
(3,198.62mm)
25.43"
(645.92mm)
122nd Driest Driest since: 2018 1965
3rd Wettest Wettest since: 2020 2020
Jun 2017–May 2021
48-Month
199.15"
(5,058.41mm)
167.92"
(4,265.17mm)
31.23"
(793.24mm)
121st Driest Driest since: 2018 1966
3rd Wettest Wettest since: 2020 2020
Jun 2016–May 2021
60-Month
243.62"
(6,187.95mm)
209.84"
(5,329.94mm)
33.78"
(858.01mm)
120th Driest Driest since: 2019 1967
3rd Wettest Wettest since: 2020 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published October 2021, retrieved on October 23, 2021 from https://www.ncdc.noaa.gov/cag/