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 1998

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1998 1-Month	27.0°F (-2.8°C)	28.1°F (-2.2°C)	-1.1°F (-0.6°C)	38th Coolest	Coolest since: 1992	1990
December 1998 1-Month	27.0°F (-2.8°C)	28.1°F (-2.2°C)	-1.1°F (-0.6°C)	91st Warmest	Warmest since: 1997	1917
Nov–Dec 1998 2-Month	31.9°F (-0.1°C)	31.3°F (-0.4°C)	0.6°F (0.3°C)	71st Coolest	Coolest since: 1996	1985
	31.9°F (-0.1°C)	31.3°F (-0.4°C)	0.6°F (0.3°C)	58th Warmest	Warmest since: 1997	1917
	Ties: 1923, 1996
Oct–Dec 1998 3-Month	36.3°F (2.4°C)	36.2°F (2.3°C)	0.1°F (0.1°C)	58th Coolest	Coolest since: 1996	1985
	36.3°F (2.4°C)	36.2°F (2.3°C)	0.1°F (0.1°C)	71st Warmest	Warmest since: 1997	1917
	Ties: 1918, 1996, 2005
Sep–Dec 1998 4-Month	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	99th Coolest	Coolest since: 1997	1985
	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	30th Warmest	Warmest since: 1995	1917
	Ties: 1989
Aug–Dec 1998 5-Month	47.3°F (8.5°C)	45.5°F (7.5°C)	1.8°F (1.0°C)	112th Coolest	Coolest since: 1997	1985
	47.3°F (8.5°C)	45.5°F (7.5°C)	1.8°F (1.0°C)	17th Warmest	Warmest since: 1991	1917, 2014
	Ties: 1950, 1991, 2003, 2021
Jul–Dec 1998 6-Month	50.8°F (10.4°C)	48.6°F (9.2°C)	2.2°F (1.2°C)	120th Coolest	Coolest since: 1997	1985
Jul–Dec 1998 6-Month	50.8°F (10.4°C)	48.6°F (9.2°C)	2.2°F (1.2°C)	9th Warmest	Warmest since: 1939	2014
Jun–Dec 1998 7-Month	51.5°F (10.8°C)	49.7°F (9.8°C)	1.8°F (1.0°C)	117th Coolest	Coolest since: 1997	1916
	51.5°F (10.8°C)	49.7°F (9.8°C)	1.8°F (1.0°C)	12th Warmest	Warmest since: 1967	2021
	Ties: 1933, 1937, 1939
May–Dec 1998 8-Month	51.3°F (10.7°C)	49.8°F (9.9°C)	1.5°F (0.8°C)	112th Coolest	Coolest since: 1997	1916
	51.3°F (10.7°C)	49.8°F (9.9°C)	1.5°F (0.8°C)	17th Warmest	Warmest since: 1987	2021
	Ties: 1967, 2022
Apr–Dec 1998 9-Month	50.4°F (10.2°C)	49.0°F (9.4°C)	1.4°F (0.8°C)	111th Coolest	Coolest since: 1997	1916
	50.4°F (10.2°C)	49.0°F (9.4°C)	1.4°F (0.8°C)	18th Warmest	Warmest since: 1988	2021
	Ties: 1936
Mar–Dec 1998 10-Month	49.1°F (9.5°C)	47.7°F (8.7°C)	1.4°F (0.8°C)	109th Coolest	Coolest since: 1997	1916
	49.1°F (9.5°C)	47.7°F (8.7°C)	1.4°F (0.8°C)	20th Warmest	Warmest since: 1994	2015
	Ties: 1994
Feb–Dec 1998 11-Month	47.7°F (8.7°C)	46.1°F (7.8°C)	1.6°F (0.9°C)	112th Coolest	Coolest since: 1997	1955
	47.7°F (8.7°C)	46.1°F (7.8°C)	1.6°F (0.9°C)	17th Warmest	Warmest since: 1992	2015
	Ties: 2012
Jan–Dec 1998 12-Month	46.3°F (7.9°C)	44.5°F (6.9°C)	1.8°F (1.0°C)	115th Coolest	Coolest since: 1997	1916
Jan–Dec 1998 12-Month	46.3°F (7.9°C)	44.5°F (6.9°C)	1.8°F (1.0°C)	14th Warmest	Warmest since: 1992	2015
Jul 1997–Dec 1998 18-Month	47.4°F (8.6°C)	45.9°F (7.7°C)	1.5°F (0.9°C)	116th Coolest	Coolest since: 1997	1985
	47.4°F (8.6°C)	45.9°F (7.7°C)	1.5°F (0.9°C)	12th Warmest	Warmest since: 1992	2015
	Ties: 1958, 2013
Jan 1997–Dec 1998 24-Month	45.8°F (7.7°C)	44.4°F (6.9°C)	1.4°F (0.8°C)	106th Coolest	Coolest since: 1997	1917
	45.8°F (7.7°C)	44.4°F (6.9°C)	1.4°F (0.8°C)	22nd Warmest	Warmest since: 1995	2015
	Ties: 1999, 2006
Jan 1996–Dec 1998 36-Month	45.5°F (7.5°C)	44.4°F (6.9°C)	1.1°F (0.6°C)	105th Coolest	Coolest since: 1997	1913
	45.5°F (7.5°C)	44.4°F (6.9°C)	1.1°F (0.6°C)	22nd Warmest	Warmest since: 1996	2016
	Ties: 1936, 1994, 1996, 2001, 2008
Jan 1995–Dec 1998 48-Month	45.6°F (7.6°C)	44.5°F (6.9°C)	1.1°F (0.7°C)	108th Coolest	Coolest since: 1997	1913, 1914, 1919
	45.6°F (7.6°C)	44.5°F (6.9°C)	1.1°F (0.7°C)	18th Warmest	Warmest since: 1995	2016, 2017
	Ties: 1942, 1990, 1992, 1995, 2000
Jan 1994–Dec 1998 60-Month	45.7°F (7.6°C)	44.5°F (6.9°C)	1.2°F (0.7°C)	112th Coolest	Coolest since: 1997	1913
	45.7°F (7.6°C)	44.5°F (6.9°C)	1.2°F (0.7°C)	13th Warmest	Warmest since: 1992	2018
	Ties: 1990, 1992, 2003, 2008, 2014

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 2, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings