Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Pacific Northwest Basin

Average Temperature Rankings, December 2011

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
December 2011
1-Month 		28.9°F
(-1.7°C)		 28.1°F
(-2.2°C)		 0.8°F
(0.5°C)		 73rd Coolest
Coolest since:
 1990
56th Warmest
Warmest since:
 1917
Ties: 2021
Nov–Dec 2011
2-Month 		31.3°F
(-0.4°C)		 31.4°F
(-0.3°C)		 -0.1°F
(-0.1°C)		 56th Coolest
Coolest since:
 1985
73rd Warmest
Warmest since:
 1917
Ties: 1903, 1967, 1988
Oct–Dec 2011
3-Month 		36.4°F
(2.4°C)		 36.2°F
(2.3°C)		 0.2°F
(0.1°C)		 66th Coolest
Coolest since:
 1985
63rd Warmest
Warmest since:
 1917
Ties: 1903, 1945, 1952, 1975
Sep–Dec 2011
4-Month 		42.4°F
(5.8°C)		 41.1°F
(5.1°C)		 1.3°F
(0.7°C)		 97th Coolest
Coolest since:
 1985
32nd Warmest
Warmest since:
 1917
Ties: 1967, 1976, 2002
Aug–Dec 2011
5-Month 		47.0°F
(8.3°C)		 45.5°F
(7.5°C)		 1.5°F
(0.8°C)		 101st Coolest
Coolest since:
 1985
28th Warmest
Warmest since:
 1917, 2014
Ties: 1962, 1988
Jul–Dec 2011
6-Month 		49.6°F
(9.8°C)		 48.6°F
(9.2°C)		 1.0°F
(0.6°C)		 93rd Coolest
Coolest since:
 1985
36th Warmest
Warmest since:
 2014
Ties: 1962, 1974, 1987, 2007, 2008
Jun–Dec 2011
7-Month 		50.2°F
(10.1°C)		 49.8°F
(9.9°C)		 0.4°F
(0.2°C)		 74th Coolest
Coolest since:
 1916
55th Warmest
Warmest since:
 2021
Ties: 1925, 1996
May–Dec 2011
8-Month 		49.8°F
(9.9°C)		 49.8°F
(9.9°C)		 0.0°F
(0.0°C)		 53rd Coolest
Coolest since:
 1916
76th Warmest
Warmest since:
 2021
Ties: 1976, 1990, 1996
Apr–Dec 2011
9-Month 		48.5°F
(9.2°C)		 49.0°F
(9.4°C)		 -0.5°F
(-0.2°C)		 34th Coolest
Coolest since:
 1916
95th Warmest
Warmest since:
 2021
Ties: 1914, 1921, 1930, 1932, 1954, 1959
Mar–Dec 2011
10-Month 		47.3°F
(8.5°C)		 47.7°F
(8.7°C)		 -0.4°F
(-0.2°C)		 39th Coolest
Coolest since:
 1916
90th Warmest
Warmest since:
 2015
Ties: 1905, 1921, 1930, 1968
Feb–Dec 2011
11-Month 		45.5°F
(7.5°C)		 46.1°F
(7.8°C)		 -0.6°F
(-0.3°C)		 33rd Coolest
Coolest since:
 1955
96th Warmest
Warmest since:
 2015
Ties: 1917, 1978
Jan–Dec 2011
12-Month 		44.2°F
(6.8°C)		 44.5°F
(6.9°C)		 -0.3°F
(-0.1°C)		 47th Coolest
Coolest since:
 1916
82nd Warmest
Warmest since:
 2015
Ties: 1933, 1960
Jul 2010–Dec 2011
18-Month 		45.8°F
(7.7°C)		 45.8°F
(7.7°C)		 0.0°F
(0.0°C)		 66th Coolest
Coolest since:
 1985
62nd Warmest
Warmest since:
 2015
Ties: 1906, 1915, 1935, 1944, 1946, 1970, 1976, 1978
Jan 2010–Dec 2011
24-Month 		44.7°F
(7.1°C)		 44.4°F
(6.9°C)		 0.3°F
(0.2°C)		 71st Coolest
Coolest since:
 1917
57th Warmest
Warmest since:
 2015
Ties: 1915, 1980, 1994, 2009
Jan 2009–Dec 2011
36-Month 		44.8°F
(7.1°C)		 44.4°F
(6.9°C)		 0.4°F
(0.2°C)		 75th Coolest
Coolest since:
 1913
52nd Warmest
Warmest since:
 2016
Ties: 1987
Jan 2008–Dec 2011
48-Month 		44.7°F
(7.1°C)		 44.4°F
(6.9°C)		 0.3°F
(0.2°C)		 72nd Coolest
Coolest since:
 1913, 1914, 1919
54th Warmest
Warmest since:
 2016, 2017
Ties: 1959, 1967, 1982, 1983
Jan 2007–Dec 2011
60-Month 		45.0°F
(7.2°C)		 44.4°F
(6.9°C)		 0.6°F
(0.3°C)		 88th Coolest
Coolest since:
 1913
37th Warmest
Warmest since:
 2018
Ties: 1962, 1989, 2012

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