Climate at a Glance

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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 August 2022. For more information, please see Climatological Rankings.

Parameter: Average Temperature Maximum Temperature Minimum Temperature Precipitation Cooling Degree Days Heating Degree Days Palmer Drought Severity Index (PDSI) Palmer Hydrological Drought Index (PHDI) Palmer Modified Drought Index (PMDI) Palmer Z-Index

Year: 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

Month: January February March April May June July August September October November December

State: Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

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Pennsylvania

Average Temperature Rankings, December 2009

View Period (Months):All1234567891011121824364860

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• Record Coolest
• Bottom 1/10
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• Top 1/3
• Top 1/10
• Record Warmest

Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2021)	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
				76th 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
				26th 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
				43rd 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
				49th 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
				41st 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
				73rd 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
				78th 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
				75th 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
				66th 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
				52nd Warmest	Warmest since: 2007	2021
	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
				38th 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
				56th 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
				60th 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
				42nd Warmest	Warmest since: 2008	2021
	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
				31st 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
				14th Warmest	Warmest since: 2008	2021
	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
				17th Warmest	Warmest since: 2008	2020, 2021
	Ties: 2005, 2007

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, Average Temperature, published September 2022, retrieved on October 6, 2022 from https://www.ncdc.noaa.gov/cag/