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 2021. For more information, please see Climatological Rankings.


Pennsylvania

Average Temperature Rankings, December 2009

View Period (Months):All1234567891011121824364860
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  • Record Coolest
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
December 2009
1-Month
28.9°F
(-1.7°C)
28.9°F
(-1.7°C)
0.0°F
(0.0°C)
52nd Coolest Coolest since: 2005 1989
75th Warmest Warmest since: 2008 2015
Ties: 1900, 1921
Nov–Dec 2009
2-Month
36.8°F
(2.7°C)
34.1°F
(1.2°C)
2.7°F
(1.5°C)
102nd Coolest Coolest since: 2008 1917
25th Warmest Warmest since: 2006 2015
Ties: 1971, 2012
Oct–Dec 2009
3-Month
40.8°F
(4.9°C)
39.7°F
(4.3°C)
1.1°F
(0.6°C)
85th Coolest Coolest since: 2008 1917
42nd Warmest Warmest since: 2007 2015
Ties: 2018
Sep–Dec 2009
4-Month
45.9°F
(7.7°C)
45.1°F
(7.3°C)
0.8°F
(0.4°C)
79th Coolest Coolest since: 2008 1917
48th Warmest Warmest since: 2007 2015
Ties: 1897
Aug–Dec 2009
5-Month
50.7°F
(10.4°C)
49.7°F
(9.8°C)
1.0°F
(0.6°C)
87th Coolest Coolest since: 2008 1917
40th Warmest Warmest since: 2007 2015
Ties: 1906, 1912, 1936, 1939, 1949, 1985
Jul–Dec 2009
6-Month
53.4°F
(11.9°C)
53.2°F
(11.8°C)
0.2°F
(0.1°C)
55th Coolest Coolest since: 2008 1976
72nd Warmest Warmest since: 2007 1931, 2015
Ties: 1932, 1993
Jun–Dec 2009
7-Month
55.1°F
(12.8°C)
55.1°F
(12.8°C)
0.0°F
(0.0°C)
50th Coolest Coolest since: 2000 1917
77th Warmest Warmest since: 2008 2015
Ties: 1955, 1978, 1986, 1993
May–Dec 2009
8-Month
55.5°F
(13.1°C)
55.4°F
(13.0°C)
0.1°F
(0.1°C)
53rd Coolest Coolest since: 2008 1917
74th Warmest Warmest since: 2007 2015
Ties: 1895, 1919, 1942, 1985
Apr–Dec 2009
9-Month
54.8°F
(12.7°C)
54.5°F
(12.5°C)
0.3°F
(0.2°C)
62nd Coolest Coolest since: 2000 1917
65th Warmest Warmest since: 2008 2015
Ties: 1944
Mar–Dec 2009
10-Month
53.1°F
(11.7°C)
52.6°F
(11.4°C)
0.5°F
(0.3°C)
76th Coolest Coolest since: 2008 1917
51st Warmest Warmest since: 2007 2012
Ties: 1899, 1979, 2003
Feb–Dec 2009
11-Month
51.0°F
(10.6°C)
50.2°F
(10.1°C)
0.8°F
(0.5°C)
90th Coolest Coolest since: 2008 1917
37th Warmest Warmest since: 2007 2012
Ties: 1913, 1941, 1948, 1954, 1985
Jan–Dec 2009
12-Month
48.4°F
(9.1°C)
48.1°F
(8.9°C)
0.3°F
(0.2°C)
72nd Coolest Coolest since: 2003 1917
55th Warmest Warmest since: 2008 1998, 2012
Ties: 1927, 1942
Jul 2008–Dec 2009
18-Month
50.0°F
(10.0°C)
49.8°F
(9.9°C)
0.2°F
(0.1°C)
67th Coolest Coolest since: 1997 1904
59th Warmest Warmest since: 2008 2012
Ties: 1911, 1929, 1930, 1941, 1988, 1992
Jan 2008–Dec 2009
24-Month
48.6°F
(9.2°C)
48.1°F
(8.9°C)
0.5°F
(0.3°C)
85th Coolest Coolest since: 2004 1905
41st Warmest Warmest since: 2008 2012
Ties: 1898, 1899, 1900, 1919, 1942, 1986, 1988
Jan 2007–Dec 2009
36-Month
48.9°F
(9.4°C)
48.1°F
(8.9°C)
0.8°F
(0.5°C)
95th Coolest Coolest since: 2005 1905, 1926
30th Warmest Warmest since: 2008 2012
Ties: 1921, 1939, 1949, 1975, 1993
Jan 2006–Dec 2009
48-Month
49.4°F
(9.7°C)
48.1°F
(8.9°C)
1.3°F
(0.8°C)
111th Coolest Coolest since: 2006 1907
13th Warmest Warmest since: 2008 2013, 2019, 2020
Ties: 1933, 2011, 2015
Jan 2005–Dec 2009
60-Month
49.4°F
(9.7°C)
48.1°F
(8.9°C)
1.3°F
(0.8°C)
107th Coolest Coolest since: 2007 1905, 1907
16th Warmest Warmest since: 2008 2020
Ties: 2005, 2007

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2021, retrieved on December 4, 2021 from https://www.ncdc.noaa.gov/cag/