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 October 2019. For more information, please see Climatological Rankings.


Pennsylvania

Precipitation Rankings, May 2009

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
(1895-2019)
Wettest/Driest
Since
Record
May 2009
1-Month
5.02"
(127.51mm)
3.93"
(99.82mm)
1.09"
(27.69mm)
93rd Driest Driest since: 2008 1964
33rd Wettest Wettest since: 2004 1989
Apr–May 2009
2-Month
8.27"
(210.06mm)
7.57"
(192.28mm)
0.70"
(17.78mm)
85th Driest Driest since: 2008 1926
41st Wettest Wettest since: 2004 2011
Mar–May 2009
3-Month
10.38"
(263.65mm)
11.06"
(280.92mm)
-0.68"
(-17.27mm)
53rd Driest Driest since: 2007 1926
73rd Wettest Wettest since: 2008 2011
Ties: 1957
Feb–May 2009
4-Month
11.68"
(296.67mm)
13.66"
(346.96mm)
-1.98"
(-50.29mm)
26th Driest Driest since: 2006 1941
100th Wettest Wettest since: 2008 2011
Jan–May 2009
5-Month
14.36"
(364.74mm)
16.71"
(424.43mm)
-2.35"
(-59.69mm)
24th Driest Driest since: 2006 1941
102nd Wettest Wettest since: 2008 2011
Dec 2008–May 2009
6-Month
19.93"
(506.22mm)
19.81"
(503.17mm)
0.12"
(3.05mm)
64th Driest Driest since: 2007 1941
61st Wettest Wettest since: 2008 2011
Nov 2008–May 2009
7-Month
22.23"
(564.64mm)
23.02"
(584.71mm)
-0.79"
(-20.07mm)
54th Driest Driest since: 2006 1934
71st Wettest Wettest since: 2008 1952
Oct 2008–May 2009
8-Month
24.94"
(633.48mm)
26.19"
(665.23mm)
-1.25"
(-31.75mm)
41st Driest Driest since: 2002 1925
84th Wettest Wettest since: 2008 2011
Sep 2008–May 2009
9-Month
29.10"
(739.14mm)
29.75"
(755.65mm)
-0.65"
(-16.51mm)
55th Driest Driest since: 2002 1941
70th Wettest Wettest since: 2008 2019
Aug 2008–May 2009
10-Month
31.70"
(805.18mm)
33.62"
(853.95mm)
-1.92"
(-48.77mm)
40th Driest Driest since: 2002 1931
85th Wettest Wettest since: 2008 2019
Jul 2008–May 2009
11-Month
36.13"
(917.70mm)
37.82"
(960.63mm)
-1.69"
(-42.93mm)
40th Driest Driest since: 2002 1931
85th Wettest Wettest since: 2008 2019
Ties: 1942
Jun 2008–May 2009
12-Month
40.25"
(1,022.35mm)
41.97"
(1,066.04mm)
-1.72"
(-43.69mm)
39th Driest Driest since: 2006 1931
86th Wettest Wettest since: 2008 2019
Dec 2007–May 2009
18-Month
65.14"
(1,654.56mm)
61.76"
(1,568.70mm)
3.38"
(85.86mm)
88th Driest Driest since: 2006 1931
36th Wettest Wettest since: 2008 2019
Jun 2007–May 2009
24-Month
87.99"
(2,234.95mm)
83.91"
(2,131.31mm)
4.08"
(103.64mm)
83rd Driest Driest since: 2003 1931
41st Wettest Wettest since: 2008 2019
Jun 2006–May 2009
36-Month
137.55"
(3,493.77mm)
125.93"
(3,198.62mm)
11.62"
(295.15mm)
105th Driest Driest since: 2008 1965
18th Wettest Wettest since: 2007 2019
Jun 2005–May 2009
48-Month
177.47"
(4,507.74mm)
167.92"
(4,265.17mm)
9.55"
(242.57mm)
97th Driest Driest since: 2004 1966
25th Wettest Wettest since: 2008 2019
Jun 2004–May 2009
60-Month
230.04"
(5,843.02mm)
209.84"
(5,329.94mm)
20.20"
(513.08mm)
113th Driest Driest since: 2006 1967
8th Wettest Wettest since: 2008 2008

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2019, retrieved on November 11, 2019 from https://www.ncdc.noaa.gov/cag/