Regional Rankings

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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 1990

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2021)	Warmest/Coolest Since	Record
December 1990 1-Month	20.1°F (-6.6°C)	28.1°F (-2.2°C)	-8.0°F (-4.4°C)	1st Coolest	Coolest since: 1990	1990
December 1990 1-Month	20.1°F (-6.6°C)	28.1°F (-2.2°C)	-8.0°F (-4.4°C)	127th Warmest	Warmest since: 1989	1917
Nov–Dec 1990 2-Month	28.2°F (-2.1°C)	31.3°F (-0.4°C)	-3.1°F (-1.7°C)	11th Coolest	Coolest since: 1985	1985
Nov–Dec 1990 2-Month	28.2°F (-2.1°C)	31.3°F (-0.4°C)	-3.1°F (-1.7°C)	117th Warmest	Warmest since: 1989	1917
Oct–Dec 1990 3-Month	33.5°F (0.8°C)	36.1°F (2.3°C)	-2.6°F (-1.5°C)	10th Coolest	Coolest since: 1985	1985
Oct–Dec 1990 3-Month	33.5°F (0.8°C)	36.1°F (2.3°C)	-2.6°F (-1.5°C)	118th Warmest	Warmest since: 1989	1917
Sep–Dec 1990 4-Month	40.5°F (4.7°C)	41.0°F (5.0°C)	-0.5°F (-0.3°C)	43rd Coolest	Coolest since: 1985	1985
	40.5°F (4.7°C)	41.0°F (5.0°C)	-0.5°F (-0.3°C)	85th Warmest	Warmest since: 1989	1917
	Ties: 1902, 1908, 1956
Aug–Dec 1990 5-Month	45.4°F (7.4°C)	45.5°F (7.5°C)	-0.1°F (-0.1°C)	52nd Coolest	Coolest since: 1985	1985
	45.4°F (7.4°C)	45.5°F (7.5°C)	-0.1°F (-0.1°C)	76th Warmest	Warmest since: 1989	1917, 2014
	Ties: 1897, 1910, 1945
Jul–Dec 1990 6-Month	48.9°F (9.4°C)	48.6°F (9.2°C)	0.3°F (0.2°C)	62nd Coolest	Coolest since: 1986	1985
	48.9°F (9.4°C)	48.6°F (9.2°C)	0.3°F (0.2°C)	66th Warmest	Warmest since: 1989	2014
	Ties: 1947, 1949, 1965
Jun–Dec 1990 7-Month	50.0°F (10.0°C)	49.7°F (9.8°C)	0.3°F (0.2°C)	58th Coolest	Coolest since: 1985	1916
	50.0°F (10.0°C)	49.7°F (9.8°C)	0.3°F (0.2°C)	70th Warmest	Warmest since: 1989	2021
	Ties: 1922, 1929, 1949, 1965, 1969, 1980, 2005, 2010
May–Dec 1990 8-Month	49.8°F (9.9°C)	49.8°F (9.9°C)	0.0°F (0.0°C)	53rd Coolest	Coolest since: 1985	1916
	49.8°F (9.9°C)	49.8°F (9.9°C)	0.0°F (0.0°C)	75th Warmest	Warmest since: 1989	2021
	Ties: 1922, 1976, 1996, 2011
Apr–Dec 1990 9-Month	49.5°F (9.7°C)	49.0°F (9.4°C)	0.5°F (0.3°C)	80th Coolest	Coolest since: 1986	1916
	49.5°F (9.7°C)	49.0°F (9.4°C)	0.5°F (0.3°C)	48th Warmest	Warmest since: 1989	2021
	Ties: 1941, 1963, 1973, 1977, 1980, 1995, 1999
Mar–Dec 1990 10-Month	48.4°F (9.1°C)	47.6°F (8.7°C)	0.8°F (0.4°C)	91st Coolest	Coolest since: 1985	1916
	48.4°F (9.1°C)	47.6°F (8.7°C)	0.8°F (0.4°C)	37th Warmest	Warmest since: 1989	2015
	Ties: 1949, 2002, 2005
Feb–Dec 1990 11-Month	46.7°F (8.2°C)	46.1°F (7.8°C)	0.6°F (0.4°C)	86th Coolest	Coolest since: 1989	1955
	46.7°F (8.2°C)	46.1°F (7.8°C)	0.6°F (0.4°C)	42nd Warmest	Warmest since: 1988	2015
	Ties: 1915, 1938, 1973, 1977, 1980, 2002
Jan–Dec 1990 12-Month	45.4°F (7.4°C)	44.5°F (6.9°C)	0.9°F (0.5°C)	95th Coolest	Coolest since: 1989	1916
	45.4°F (7.4°C)	44.5°F (6.9°C)	0.9°F (0.5°C)	33rd Warmest	Warmest since: 1988	2015
	Ties: 1961, 1991, 1997
Jul 1989–Dec 1990 18-Month	46.7°F (8.2°C)	45.8°F (7.7°C)	0.9°F (0.5°C)	93rd Coolest	Coolest since: 1989	1985
Jul 1989–Dec 1990 18-Month	46.7°F (8.2°C)	45.8°F (7.7°C)	0.9°F (0.5°C)	34th Warmest	Warmest since: 1988	2015
Jan 1989–Dec 1990 24-Month	45.0°F (7.2°C)	44.4°F (6.9°C)	0.6°F (0.3°C)	84th Coolest	Coolest since: 1986	1917
	45.0°F (7.2°C)	44.4°F (6.9°C)	0.6°F (0.3°C)	43rd Warmest	Warmest since: 1989	2015
	Ties: 1954, 1966, 1974
Jan 1988–Dec 1990 36-Month	45.3°F (7.4°C)	44.4°F (6.9°C)	0.9°F (0.5°C)	97th Coolest	Coolest since: 1987	1913
	45.3°F (7.4°C)	44.4°F (6.9°C)	0.9°F (0.5°C)	29th Warmest	Warmest since: 1989	2016
	Ties: 1935, 1997, 2013
Jan 1987–Dec 1990 48-Month	45.6°F (7.6°C)	44.4°F (6.9°C)	1.2°F (0.7°C)	108th Coolest	Coolest since: 1988	1913, 1914, 1919
	45.6°F (7.6°C)	44.4°F (6.9°C)	1.2°F (0.7°C)	17th Warmest	Warmest since: 1989	2016, 2017
	Ties: 1942, 1992, 1995, 1998, 2000
Jan 1986–Dec 1990 60-Month	45.7°F (7.6°C)	44.5°F (6.9°C)	1.2°F (0.7°C)	112th Coolest	Coolest since: 1989	1913
	45.7°F (7.6°C)	44.5°F (6.9°C)	1.2°F (0.7°C)	12th Warmest	Warmest to Date	2018
	Ties: 1992, 1998, 2003, 2008, 2014

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published November 2022, retrieved on November 30, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings