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 December 2021. For more information, please see Climatological Rankings.


Pennsylvania

Precipitation Rankings, September 2021

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
September 2021
1-Month
6.98"
(177.29mm)
3.59"
(91.19mm)
3.39"
(86.10mm)
121st Driest Driest since: 2020 1943
7th Wettest Wettest since: 2018 2011
Aug–Sep 2021
2-Month
12.85"
(326.39mm)
7.45"
(189.23mm)
5.40"
(137.16mm)
123rd Driest Driest since: 2020 1943
5th Wettest Wettest since: 2018 2011
Jul–Sep 2021
3-Month
19.10"
(485.14mm)
11.64"
(295.66mm)
7.46"
(189.48mm)
124th Driest Driest since: 2020 1930
4th Wettest Wettest since: 2018 2018
Jun–Sep 2021
4-Month
22.64"
(575.06mm)
15.81"
(401.57mm)
6.83"
(173.49mm)
122nd Driest Driest since: 2020 1930
6th Wettest Wettest since: 2018 2018
May–Sep 2021
5-Month
26.92"
(683.77mm)
19.74"
(501.40mm)
7.18"
(182.37mm)
122nd Driest Driest since: 2020 1930
6th Wettest Wettest since: 2018 2018
Apr–Sep 2021
6-Month
29.71"
(754.63mm)
23.38"
(593.85mm)
6.33"
(160.78mm)
122nd Driest Driest since: 2020 1930
6th Wettest Wettest since: 2018 2018
Mar–Sep 2021
7-Month
32.52"
(826.01mm)
26.87"
(682.50mm)
5.65"
(143.51mm)
118th Driest Driest since: 2020 1930
10th Wettest Wettest since: 2018 2011
Ties: 1994
Feb–Sep 2021
8-Month
35.54"
(902.72mm)
29.47"
(748.54mm)
6.07"
(154.18mm)
117th Driest Driest since: 2020 1995
11th Wettest Wettest since: 2018 2011
Jan–Sep 2021
9-Month
37.34"
(948.44mm)
32.52"
(826.01mm)
4.82"
(122.43mm)
113th Driest Driest since: 2020 1930
15th Wettest Wettest since: 2019 2018
Dec 2020–Sep 2021
10-Month
41.78"
(1,061.21mm)
35.62"
(904.75mm)
6.16"
(156.46mm)
112th Driest Driest since: 2020 1963
15th Wettest Wettest since: 2019 2011
Nov 2020–Sep 2021
11-Month
44.75"
(1,136.65mm)
38.83"
(986.28mm)
5.92"
(150.37mm)
110th Driest Driest since: 2020 1963
17th Wettest Wettest since: 2019 2011
Oct 2020–Sep 2021
12-Month
48.38"
(1,228.85mm)
42.00"
(1,066.80mm)
6.38"
(162.05mm)
110th Driest Driest since: 2020 1925
17th Wettest Wettest since: 2019 2011
Apr 2020–Sep 2021
18-Month
69.93"
(1,776.22mm)
65.31"
(1,658.87mm)
4.62"
(117.35mm)
99th Driest Driest since: 2017 1966
28th Wettest Wettest since: 2020 2019
Oct 2019–Sep 2021
24-Month
92.36"
(2,345.94mm)
83.94"
(2,132.08mm)
8.42"
(213.86mm)
108th Driest Driest since: 2017 1966
18th Wettest Wettest since: 2020 2019
Oct 2018–Sep 2021
36-Month
145.98"
(3,707.89mm)
125.94"
(3,198.88mm)
20.04"
(509.01mm)
119th Driest Driest since: 2018 1965
6th Wettest Wettest since: 2020 2019
Oct 2017–Sep 2021
48-Month
205.10"
(5,209.54mm)
167.94"
(4,265.68mm)
37.16"
(943.86mm)
123rd Driest Driest since: 2020 1966
1st Wettest Wettest to Date 2021
Oct 2016–Sep 2021
60-Month
251.45"
(6,386.83mm)
209.89"
(5,331.21mm)
41.56"
(1,055.62mm)
122nd Driest Driest since: 2020 1966
1st Wettest Wettest to Date 2021

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2022, retrieved on January 23, 2022 from https://www.ncdc.noaa.gov/cag/