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, September 2011

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 2011
1-Month 		66.09°F
(18.94°C)		 64.86°F
(18.26°C)		 1.23°F
(0.68°C)		 94th Coolest
Coolest since:
 1965
35th Warmest
Warmest since:
 1998
Ties: 1911, 1979
Aug–Sep 2011
2-Month 		70.55°F
(21.42°C)		 68.48°F
(20.27°C)		 2.07°F
(1.15°C)		 123rd Coolest
Coolest since:
 1974
6th Warmest
Warmest since:
 1998
Jul–Sep 2011
3-Month 		72.41°F
(22.45°C)		 70.19°F
(21.22°C)		 2.22°F
(1.23°C)		 125th Coolest
Coolest since:
 1950
4th Warmest
Warmest since:
 2022
Jun–Sep 2011
4-Month 		71.76°F
(22.09°C)		 69.77°F
(20.98°C)		 1.99°F
(1.11°C)		 122nd Coolest
Coolest since:
 1903
7th Warmest
Warmest since:
 2021, 2022
May–Sep 2011
5-Month 		69.24°F
(20.69°C)		 67.85°F
(19.92°C)		 1.39°F
(0.77°C)		 115th Coolest
Coolest since:
 1907
14th Warmest
Warmest since:
 2018
Apr–Sep 2011
6-Month 		66.36°F
(19.09°C)		 65.05°F
(18.36°C)		 1.31°F
(0.73°C)		 110th Coolest
Coolest since:
 1907
19th Warmest
Warmest since:
 2012
Mar–Sep 2011
7-Month 		63.03°F
(17.24°C)		 61.69°F
(16.49°C)		 1.34°F
(0.75°C)		 110th Coolest
Coolest since:
 1912
19th Warmest
Warmest since:
 2012
Feb–Sep 2011
8-Month 		59.28°F
(15.16°C)		 58.21°F
(14.56°C)		 1.07°F
(0.60°C)		 100th Coolest
Coolest since:
 1917
29th Warmest
Warmest since:
 2012
Ties: 2010
Jan–Sep 2011
9-Month 		56.00°F
(13.33°C)		 55.08°F
(12.82°C)		 0.92°F
(0.51°C)		 95th Coolest
Coolest since:
 1912
34th Warmest
Warmest since:
 2012
Dec 2010–Sep 2011
10-Month 		53.64°F
(12.02°C)		 52.85°F
(11.58°C)		 0.79°F
(0.44°C)		 94th Coolest
Coolest since:
 1917
34th Warmest
Warmest since:
 2012
Nov 2010–Sep 2011
11-Month 		52.61°F
(11.45°C)		 51.84°F
(11.02°C)		 0.77°F
(0.43°C)		 95th Coolest
Coolest since:
 1912
33rd Warmest
Warmest since:
 2012
Oct 2010–Sep 2011
12-Month 		52.91°F
(11.62°C)		 52.03°F
(11.13°C)		 0.88°F
(0.49°C)		 102nd Coolest
Coolest since:
 1912
26th Warmest
Warmest since:
 2012
Ties: 1939, 1995
Apr 2010–Sep 2011
18-Month 		57.43°F
(14.13°C)		 56.37°F
(13.54°C)		 1.06°F
(0.59°C)		 109th Coolest
Coolest since:
 1917
19th Warmest
Warmest since:
 2012
Oct 2009–Sep 2011
24-Month 		52.74°F
(11.52°C)		 52.02°F
(11.12°C)		 0.72°F
(0.40°C)		 94th Coolest
Coolest since:
 1913, 1918
33rd Warmest
Warmest since:
 2017
Oct 2008–Sep 2011
36-Month 		52.73°F
(11.52°C)		 52.00°F
(11.11°C)		 0.73°F
(0.41°C)		 96th Coolest
Coolest since:
 1917
30th Warmest
Warmest since:
 2018
Ties: 1954, 1989
Oct 2007–Sep 2011
48-Month 		52.71°F
(11.51°C)		 51.99°F
(11.11°C)		 0.72°F
(0.40°C)		 95th Coolest
Coolest since:
 1918
30th Warmest
Warmest since:
 2018
Oct 2006–Sep 2011
60-Month 		52.88°F
(11.60°C)		 51.98°F
(11.10°C)		 0.90°F
(0.50°C)		 100th Coolest
Coolest since:
 1920
24th Warmest
Warmest since:
 2020

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