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


Pennsylvania

Average Temperature Rankings, December 1999

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
December 1999
1-Month
32.4°F
(0.2°C)
28.9°F
(-1.7°C)
3.5°F
(1.9°C)
97th Coolest Coolest since: 1997 1989
31st Warmest Warmest since: 1998 2015
Nov–Dec 1999
2-Month
38.6°F
(3.7°C)
34.1°F
(1.2°C)
4.5°F
(2.5°C)
118th Coolest Coolest since: 1997 1917
10th Warmest Warmest since: 1998 2015
Oct–Dec 1999
3-Month
42.2°F
(5.7°C)
39.7°F
(4.3°C)
2.5°F
(1.4°C)
107th Coolest Coolest since: 1997 1917
21st Warmest Warmest since: 1998 2015
Sep–Dec 1999
4-Month
47.3°F
(8.5°C)
45.1°F
(7.3°C)
2.2°F
(1.2°C)
110th Coolest Coolest since: 1997 1917
18th Warmest Warmest since: 1998 2015
Ties: 1984, 2018
Aug–Dec 1999
5-Month
51.6°F
(10.9°C)
49.8°F
(9.9°C)
1.8°F
(1.0°C)
107th Coolest Coolest since: 1997 1917
21st Warmest Warmest since: 1998 2015
Ties: 1961
Jul–Dec 1999
6-Month
55.3°F
(12.9°C)
53.2°F
(11.8°C)
2.1°F
(1.1°C)
114th Coolest Coolest since: 1997 1976
14th Warmest Warmest since: 1998 1931, 2015
Ties: 2012
Jun–Dec 1999
7-Month
57.0°F
(13.9°C)
55.0°F
(12.8°C)
2.0°F
(1.1°C)
115th Coolest Coolest since: 1997 1917
13th Warmest Warmest since: 1998 2015
Ties: 1971, 2006
May–Dec 1999
8-Month
57.3°F
(14.1°C)
55.4°F
(13.0°C)
1.9°F
(1.1°C)
114th Coolest Coolest since: 1997 1917
14th Warmest Warmest since: 1998 2015
Apr–Dec 1999
9-Month
56.3°F
(13.5°C)
54.4°F
(12.4°C)
1.9°F
(1.1°C)
114th Coolest Coolest since: 1997 1917
14th Warmest Warmest since: 1998 2015
Ties: 1959, 2006, 2018
Mar–Dec 1999
10-Month
54.1°F
(12.3°C)
52.5°F
(11.4°C)
1.6°F
(0.9°C)
110th Coolest Coolest since: 1997 1917
18th Warmest Warmest since: 1998 2021
Ties: 1959
Feb–Dec 1999
11-Month
52.1°F
(11.2°C)
50.2°F
(10.1°C)
1.9°F
(1.1°C)
113th Coolest Coolest since: 1997 1917
15th Warmest Warmest since: 1998 2012
Ties: 2001, 2019
Jan–Dec 1999
12-Month
50.0°F
(10.0°C)
48.1°F
(8.9°C)
1.9°F
(1.1°C)
111th Coolest Coolest since: 1997 1917
17th Warmest Warmest since: 1998 1998, 2012
Jul 1998–Dec 1999
18-Month
51.9°F
(11.1°C)
49.9°F
(9.9°C)
2.0°F
(1.2°C)
117th Coolest Coolest since: 1997 1904
10th Warmest Warmest since: 1998 2012
Ties: 1932
Jan 1998–Dec 1999
24-Month
50.9°F
(10.5°C)
48.2°F
(9.0°C)
2.7°F
(1.5°C)
124th Coolest Coolest since: 1998 1905
3rd Warmest Warmest to Date 2021
Jan 1997–Dec 1999
36-Month
49.9°F
(9.9°C)
48.1°F
(8.9°C)
1.8°F
(1.0°C)
117th Coolest Coolest since: 1998 1905, 1926
9th Warmest Warmest to Date 2012
Ties: 2007
Jan 1996–Dec 1999
48-Month
49.3°F
(9.6°C)
48.1°F
(8.9°C)
1.2°F
(0.7°C)
107th Coolest Coolest since: 1998 1907
18th Warmest Warmest since: 1993 2021
Ties: 1993, 2004, 2006
Jan 1995–Dec 1999
60-Month
49.2°F
(9.6°C)
48.1°F
(8.9°C)
1.1°F
(0.7°C)
103rd Coolest Coolest since: 1998 1905, 1907
21st Warmest Warmest since: 1991 2020, 2021
Ties: 1991, 2000, 2004

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, Average Temperature, published September 2022, retrieved on September 27, 2022 from https://www.ncdc.noaa.gov/cag/