Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. 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 1947

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
December 1947
1-Month 		30.0°F
(-1.1°C)		 28.1°F
(-2.2°C)		 1.9°F
(1.1°C)		 88th Coolest
Coolest since:
 1990
41st Warmest
Warmest since:
 1917
Nov–Dec 1947
2-Month 		31.7°F
(-0.2°C)		 31.3°F
(-0.4°C)		 0.4°F
(0.2°C)		 67th Coolest
Coolest since:
 1985
62nd Warmest
Warmest since:
 1917
Ties: 1920, 1946
Oct–Dec 1947
3-Month 		37.0°F
(2.8°C)		 36.1°F
(2.3°C)		 0.9°F
(0.5°C)		 81st Coolest
Coolest since:
 1985
48th Warmest
Warmest since:
 1917
Ties: 2008, 2016
Sep–Dec 1947
4-Month 		41.9°F
(5.5°C)		 41.1°F
(5.1°C)		 0.8°F
(0.4°C)		 81st Coolest
Coolest since:
 1985
48th Warmest
Warmest since:
 1917
Ties: 2017
Aug–Dec 1947
5-Month 		45.8°F
(7.7°C)		 45.4°F
(7.4°C)		 0.4°F
(0.3°C)		 68th Coolest
Coolest since:
 1985
61st Warmest
Warmest since:
 1917, 2014
Ties: 1936, 1944, 2005
Jul–Dec 1947
6-Month 		48.9°F
(9.4°C)		 48.6°F
(9.2°C)		 0.3°F
(0.2°C)		 62nd Coolest
Coolest since:
 1985
67th Warmest
Warmest since:
 2014
Ties: 1949, 1965, 1990
Jun–Dec 1947
7-Month 		49.7°F
(9.8°C)		 49.8°F
(9.9°C)		 -0.1°F
(-0.1°C)		 50th Coolest
Coolest since:
 1916
79th Warmest
Warmest since:
 2021
Ties: 1910, 1975, 1976
May–Dec 1947
8-Month 		50.3°F
(10.2°C)		 49.8°F
(9.9°C)		 0.5°F
(0.3°C)		 79th Coolest
Coolest since:
 1916
50th Warmest
Warmest since:
 2021
Ties: 1906, 1926, 1953, 1981, 2009
Apr–Dec 1947
9-Month 		49.6°F
(9.8°C)		 49.0°F
(9.4°C)		 0.6°F
(0.4°C)		 85th Coolest
Coolest since:
 1916
44th Warmest
Warmest since:
 2021
Ties: 1952, 1962, 1969, 1981
Mar–Dec 1947
10-Month 		48.5°F
(9.2°C)		 47.6°F
(8.7°C)		 0.9°F
(0.5°C)		 95th Coolest
Coolest since:
 1916
34th Warmest
Warmest since:
 2015
Ties: 1966, 1981, 1997
Feb–Dec 1947
11-Month 		47.2°F
(8.4°C)		 46.1°F
(7.8°C)		 1.1°F
(0.6°C)		 102nd Coolest
Coolest since:
 1955
27th Warmest
Warmest since:
 2015
Ties: 1963, 2006
Jan–Dec 1947
12-Month 		45.2°F
(7.3°C)		 44.4°F
(6.9°C)		 0.8°F
(0.4°C)		 87th Coolest
Coolest since:
 1916
42nd Warmest
Warmest since:
 2015
Ties: 1938, 2002, 2010
Jul 1946–Dec 1947
18-Month 		46.1°F
(7.8°C)		 45.8°F
(7.7°C)		 0.3°F
(0.1°C)		 72nd Coolest
Coolest since:
 1985
56th Warmest
Warmest since:
 2015
Ties: 1925
Jan 1946–Dec 1947
24-Month 		44.8°F
(7.1°C)		 44.5°F
(6.9°C)		 0.3°F
(0.2°C)		 76th Coolest
Coolest since:
 1917
52nd Warmest
Warmest since:
 2015
Ties: 1901, 1925, 1961, 1963
Jan 1945–Dec 1947
36-Month 		44.7°F
(7.1°C)		 44.5°F
(6.9°C)		 0.2°F
(0.2°C)		 73rd Coolest
Coolest since:
 1913
54th Warmest
Warmest since:
 2016
Ties: 1928, 1954, 1961, 1962, 1982, 1983
Jan 1944–Dec 1947
48-Month 		44.5°F
(6.9°C)		 44.4°F
(6.9°C)		 0.1°F
(0.0°C)		 59th Coolest
Coolest since:
 1913, 1914, 1919
67th Warmest
Warmest since:
 2016, 2017
Ties: 1907, 1944, 1964, 1966, 1979, 1987
Jan 1943–Dec 1947
60-Month 		44.4°F
(6.9°C)		 44.4°F
(6.9°C)		 0.0°F
(0.0°C)		 52nd Coolest
Coolest since:
 1913
73rd Warmest
Warmest since:
 2018
Ties: 1908, 1926, 1964, 1974

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