Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Pennsylvania

Average Temperature Rankings, December 1999

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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
(1895-2022)
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)
98th Coolest
Coolest since:
1989
31st Warmest
Warmest since:
2015
Nov–Dec 1999
2-Month
38.6°F
(3.7°C)
34.1°F
(1.2°C)
4.5°F
(2.5°C)
119th Coolest
Coolest since:
1917
10th Warmest
Warmest since:
2015
Oct–Dec 1999
3-Month
42.2°F
(5.7°C)
39.7°F
(4.3°C)
2.5°F
(1.4°C)
108th Coolest
Coolest since:
1917
21st Warmest
Warmest since:
2015
Sep–Dec 1999
4-Month
47.3°F
(8.5°C)
45.1°F
(7.3°C)
2.2°F
(1.2°C)
111th Coolest
Coolest since:
1917
18th Warmest
Warmest since:
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)
108th Coolest
Coolest since:
1917
21st Warmest
Warmest since:
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)
115th Coolest
Coolest since:
1976
14th Warmest
Warmest since:
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)
116th Coolest
Coolest since:
1917
13th Warmest
Warmest since:
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)
115th Coolest
Coolest since:
1917
14th Warmest
Warmest since:
2015
Apr–Dec 1999
9-Month
56.3°F
(13.5°C)
54.4°F
(12.4°C)
1.9°F
(1.1°C)
115th Coolest
Coolest since:
1917
14th Warmest
Warmest since:
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:
1917
19th Warmest
Warmest since:
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)
114th Coolest
Coolest since:
1917
15th Warmest
Warmest since:
2012
Ties: 2001, 2019, 2022
Jan–Dec 1999
12-Month
50.0°F
(10.0°C)
48.1°F
(8.9°C)
1.9°F
(1.1°C)
112th Coolest
Coolest since:
1917
17th Warmest
Warmest since:
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:
1904
11th Warmest
Warmest since:
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)
125th Coolest
Coolest since:
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:
1905, 1926
10th 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:
1907
19th Warmest
Warmest since:
2021, 2022
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:
1905, 1907
22nd Warmest
Warmest since:
2020, 2021
Ties: 1991, 2000, 2004

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