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 1997

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
December 1997
1-Month 		28.7°F
(-1.8°C)		 28.1°F
(-2.2°C)		 0.6°F
(0.4°C)		 71st Coolest
Coolest since:
 1990
58th Warmest
Warmest since:
 1917
Ties: 2017
Nov–Dec 1997
2-Month 		33.0°F
(0.6°C)		 31.4°F
(-0.3°C)		 1.6°F
(0.9°C)		 93rd Coolest
Coolest since:
 1985
36th Warmest
Warmest since:
 1917
Ties: 2001
Oct–Dec 1997
3-Month 		36.9°F
(2.7°C)		 36.2°F
(2.3°C)		 0.7°F
(0.4°C)		 78th Coolest
Coolest since:
 1985
51st Warmest
Warmest since:
 1917
Ties: 1900, 1925
Sep–Dec 1997
4-Month 		42.2°F
(5.7°C)		 41.1°F
(5.1°C)		 1.1°F
(0.6°C)		 91st Coolest
Coolest since:
 1985
38th Warmest
Warmest since:
 1917
Aug–Dec 1997
5-Month 		46.8°F
(8.2°C)		 45.5°F
(7.5°C)		 1.3°F
(0.7°C)		 97th Coolest
Coolest since:
 1985
32nd Warmest
Warmest since:
 1917, 2014
Ties: 1901, 1974
Jul–Dec 1997
6-Month 		49.5°F
(9.7°C)		 48.6°F
(9.2°C)		 0.9°F
(0.5°C)		 87th Coolest
Coolest since:
 1985
42nd Warmest
Warmest since:
 2014
Ties: 1901, 1995
Jun–Dec 1997
7-Month 		50.5°F
(10.3°C)		 49.8°F
(9.9°C)		 0.7°F
(0.4°C)		 89th Coolest
Coolest since:
 1916
40th Warmest
Warmest since:
 2021
Ties: 1906, 1918, 1962, 1977, 1981, 2008
May–Dec 1997
8-Month 		50.9°F
(10.5°C)		 49.8°F
(9.9°C)		 1.1°F
(0.6°C)		 101st Coolest
Coolest since:
 1916
28th Warmest
Warmest since:
 2021
Ties: 2002
Apr–Dec 1997
9-Month 		49.8°F
(9.9°C)		 49.0°F
(9.4°C)		 0.8°F
(0.5°C)		 94th Coolest
Coolest since:
 1916
35th Warmest
Warmest since:
 2021
Ties: 1906, 1933, 1938, 1967, 2019
Mar–Dec 1997
10-Month 		48.5°F
(9.2°C)		 47.7°F
(8.7°C)		 0.8°F
(0.5°C)		 95th Coolest
Coolest since:
 1916
34th Warmest
Warmest since:
 2015
Ties: 1947, 1966, 1981
Feb–Dec 1997
11-Month 		46.9°F
(8.3°C)		 46.1°F
(7.8°C)		 0.8°F
(0.5°C)		 92nd Coolest
Coolest since:
 1955
37th Warmest
Warmest since:
 2015
Ties: 1974
Jan–Dec 1997
12-Month 		45.4°F
(7.4°C)		 44.5°F
(6.9°C)		 0.9°F
(0.5°C)		 95th Coolest
Coolest since:
 1916
34th Warmest
Warmest since:
 2015
Ties: 1961, 1990, 1991
Jul 1996–Dec 1997
18-Month 		46.6°F
(8.1°C)		 45.8°F
(7.7°C)		 0.8°F
(0.4°C)		 92nd Coolest
Coolest since:
 1985
36th Warmest
Warmest since:
 2015
Ties: 1961, 1963, 1968, 1980, 2019
Jan 1996–Dec 1997
24-Month 		45.1°F
(7.3°C)		 44.5°F
(6.9°C)		 0.6°F
(0.4°C)		 86th Coolest
Coolest since:
 1917
42nd Warmest
Warmest since:
 2015
Ties: 2010
Jan 1995–Dec 1997
36-Month 		45.3°F
(7.4°C)		 44.4°F
(6.9°C)		 0.9°F
(0.5°C)		 97th Coolest
Coolest since:
 1913
30th Warmest
Warmest since:
 2016
Ties: 1935, 1990, 2013
Jan 1994–Dec 1997
48-Month 		45.5°F
(7.5°C)		 44.4°F
(6.9°C)		 1.1°F
(0.6°C)		 102nd Coolest
Coolest since:
 1913, 1914, 1919
24th Warmest
Warmest since:
 2016, 2017
Ties: 1994, 1999, 2008
Jan 1993–Dec 1997
60-Month 		45.1°F
(7.3°C)		 44.4°F
(6.9°C)		 0.7°F
(0.4°C)		 90th Coolest
Coolest since:
 1913
35th Warmest
Warmest since:
 2018
Ties: 1938

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