National Rankings

National Data Info
Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Average Temperature Rankings, December 2015

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
December 2015
1-Month 		38.66°F
(3.70°C)		 32.68°F
(0.38°C)		 5.98°F
(3.32°C)		 127th Coolest
Coolest since:
 1983
2nd Warmest
Warmest to Date
 2021
Nov–Dec 2015
2-Month 		41.63°F
(5.35°C)		 37.19°F
(2.88°C)		 4.44°F
(2.47°C)		 125th Coolest
Coolest since:
 2000
4th Warmest
Warmest since:
 2021
Oct–Dec 2015
3-Month 		46.83°F
(8.24°C)		 42.83°F
(6.02°C)		 4.00°F
(2.22°C)		 127th Coolest
Coolest since:
 1898
2nd Warmest
Warmest to Date
 2021
Sep–Dec 2015
4-Month 		52.26°F
(11.26°C)		 48.34°F
(9.08°C)		 3.92°F
(2.18°C)		 127th Coolest
Coolest since:
 1976
2nd Warmest
Warmest to Date
 2021
Aug–Dec 2015
5-Month 		56.40°F
(13.56°C)		 53.09°F
(11.72°C)		 3.31°F
(1.84°C)		 127th Coolest
Coolest since:
 1976
2nd Warmest
Warmest to Date
 2021
Jul–Dec 2015
6-Month 		59.32°F
(15.18°C)		 56.51°F
(13.62°C)		 2.81°F
(1.56°C)		 127th Coolest
Coolest since:
 1976
2nd Warmest
Warmest to Date
 2021
Jun–Dec 2015
7-Month 		61.04°F
(16.13°C)		 58.22°F
(14.57°C)		 2.82°F
(1.56°C)		 127th Coolest
Coolest since:
 1976
2nd Warmest
Warmest to Date
 2021
May–Dec 2015
8-Month 		61.02°F
(16.12°C)		 58.47°F
(14.71°C)		 2.55°F
(1.41°C)		 127th Coolest
Coolest since:
 1976
2nd Warmest
Warmest to Date
 2021
Apr–Dec 2015
9-Month 		60.15°F
(15.64°C)		 57.64°F
(14.24°C)		 2.51°F
(1.40°C)		 127th Coolest
Coolest since:
 1917
2nd Warmest
Warmest to Date
 2021
Mar–Dec 2015
10-Month 		58.68°F
(14.82°C)		 56.03°F
(13.35°C)		 2.65°F
(1.47°C)		 125th Coolest
Coolest since:
 1917
4th Warmest
Warmest since:
 2012
Feb–Dec 2015
11-Month 		56.34°F
(13.52°C)		 54.01°F
(12.23°C)		 2.33°F
(1.29°C)		 125th Coolest
Coolest since:
 1917
4th Warmest
Warmest since:
 2012
Jan–Dec 2015
12-Month 		54.40°F
(12.44°C)		 52.02°F
(11.12°C)		 2.38°F
(1.32°C)		 124th Coolest
Coolest since:
 1917
5th Warmest
Warmest since:
 2012
Jul 2014–Dec 2015
18-Month 		55.42°F
(13.01°C)		 53.52°F
(11.96°C)		 1.90°F
(1.05°C)		 118th Coolest
Coolest since:
 1917
10th Warmest
Warmest since:
 2012, 2016
Jan 2014–Dec 2015
24-Month 		53.47°F
(11.93°C)		 52.02°F
(11.12°C)		 1.45°F
(0.81°C)		 113th Coolest
Coolest since:
 1917
15th Warmest
Warmest since:
 2017
Jan 2013–Dec 2015
36-Month 		53.12°F
(11.73°C)		 52.01°F
(11.12°C)		 1.11°F
(0.61°C)		 106th Coolest
Coolest since:
 1917
21st Warmest
Warmest since:
 2017
Jan 2012–Dec 2015
48-Month 		53.66°F
(12.03°C)		 52.00°F
(11.11°C)		 1.66°F
(0.92°C)		 118th Coolest
Coolest since:
 1917
8th Warmest
Warmest since:
 2018
Ties: 2007
Jan 2011–Dec 2015
60-Month 		53.57°F
(11.98°C)		 51.99°F
(11.11°C)		 1.58°F
(0.87°C)		 115th Coolest
Coolest since:
 1920
10th Warmest
Warmest since:
 2019, 2020

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