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 2019. For more information, please see Climatological Rankings.


Pennsylvania

Precipitation Rankings, December 2009

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Wettest/Driest
Since
Record
December 2009
1-Month
4.39"
(111.51mm)
3.11"
(78.99mm)
1.28"
(32.52mm)
108th Driest Driest since: 2006 1955
18th Wettest Wettest since: 2008 1990
Nov–Dec 2009
2-Month
6.00"
(152.40mm)
6.29"
(159.77mm)
-0.29"
(-7.37mm)
51st Driest Driest since: 2001 1917
75th Wettest Wettest since: 2008 1972
Oct–Dec 2009
3-Month
10.77"
(273.56mm)
9.46"
(240.28mm)
1.31"
(33.28mm)
84th Driest Driest since: 2008 1924
42nd Wettest Wettest since: 2007 1927
Sep–Dec 2009
4-Month
13.55"
(344.17mm)
13.04"
(331.22mm)
0.51"
(12.95mm)
72nd Driest Driest since: 2001 1908
54th Wettest Wettest since: 2008 2018
Aug–Dec 2009
5-Month
18.53"
(470.66mm)
16.91"
(429.51mm)
1.62"
(41.15mm)
84th Driest Driest since: 2008 1930
42nd Wettest Wettest since: 2007 2018
Jul–Dec 2009
6-Month
23.50"
(596.90mm)
21.10"
(535.94mm)
2.40"
(60.96mm)
93rd Driest Driest since: 2008 1930
33rd Wettest Wettest since: 2007 2018
Ties: 1915
Jun–Dec 2009
7-Month
28.41"
(721.61mm)
25.27"
(641.86mm)
3.14"
(79.75mm)
98th Driest Driest since: 2008 1930
28th Wettest Wettest since: 2006 2018
May–Dec 2009
8-Month
33.43"
(849.12mm)
29.19"
(741.43mm)
4.24"
(107.69mm)
107th Driest Driest since: 2008 1930
19th Wettest Wettest since: 2006 2018
Apr–Dec 2009
9-Month
36.68"
(931.67mm)
32.84"
(834.14mm)
3.84"
(97.53mm)
102nd Driest Driest since: 2008 1930
24th Wettest Wettest since: 2006 2018
Mar–Dec 2009
10-Month
38.79"
(985.27mm)
36.33"
(922.78mm)
2.46"
(62.49mm)
87th Driest Driest since: 2008 1930
39th Wettest Wettest since: 2006 2011
Feb–Dec 2009
11-Month
40.09"
(1,018.29mm)
38.93"
(988.82mm)
1.16"
(29.47mm)
74th Driest Driest since: 2005 1930
52nd Wettest Wettest since: 2008 2018
Jan–Dec 2009
12-Month
42.77"
(1,086.36mm)
41.98"
(1,066.29mm)
0.79"
(20.07mm)
68th Driest Driest since: 2001 1930
58th Wettest Wettest since: 2008 2018
Jul 2008–Dec 2009
18-Month
64.54"
(1,639.32mm)
63.09"
(1,602.49mm)
1.45"
(36.83mm)
69th Driest Driest since: 2002 1931
56th Wettest Wettest since: 2008 2019
Jan 2008–Dec 2009
24-Month
88.59"
(2,250.19mm)
83.92"
(2,131.57mm)
4.67"
(118.62mm)
92nd Driest Driest since: 2002 1931
33rd Wettest Wettest since: 2008 2019
Jan 2007–Dec 2009
36-Month
132.71"
(3,370.83mm)
125.86"
(3,196.84mm)
6.85"
(173.99mm)
97th Driest Driest since: 2003 1965
27th Wettest Wettest since: 2008 2019
Jan 2006–Dec 2009
48-Month
180.28"
(4,579.11mm)
167.85"
(4,263.39mm)
12.43"
(315.72mm)
103rd Driest Driest since: 2003 1966
20th Wettest Wettest since: 2008 2019
Jan 2005–Dec 2009
60-Month
223.25"
(5,670.55mm)
209.87"
(5,330.70mm)
13.38"
(339.85mm)
100th Driest Driest since: 2003 1966
22nd Wettest Wettest since: 2008 2019

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2020, retrieved on January 20, 2020 from https://www.ncdc.noaa.gov/cag/