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 1991

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1991 1-Month	30.7°F (-0.7°C)	28.1°F (-2.2°C)	2.6°F (1.5°C)	98th Coolest	Coolest since: 1990	1990
	30.7°F (-0.7°C)	28.1°F (-2.2°C)	2.6°F (1.5°C)	31st Warmest	Warmest since: 1981	1917
	Ties: 1969
Nov–Dec 1991 2-Month	32.6°F (0.3°C)	31.4°F (-0.3°C)	1.2°F (0.6°C)	87th Coolest	Coolest since: 1990	1985
	32.6°F (0.3°C)	31.4°F (-0.3°C)	1.2°F (0.6°C)	42nd Warmest	Warmest since: 1989	1917
	Ties: 1906, 2018
Oct–Dec 1991 3-Month	37.2°F (2.9°C)	36.2°F (2.3°C)	1.0°F (0.6°C)	91st Coolest	Coolest since: 1990	1985
	37.2°F (2.9°C)	36.2°F (2.3°C)	1.0°F (0.6°C)	38th Warmest	Warmest since: 1989	1917
	Ties: 1929, 2003
Sep–Dec 1991 4-Month	42.6°F (5.9°C)	41.0°F (5.0°C)	1.6°F (0.9°C)	103rd Coolest	Coolest since: 1990	1985
	42.6°F (5.9°C)	41.0°F (5.0°C)	1.6°F (0.9°C)	26th Warmest	Warmest since: 1988	1917
	Ties: 1907, 1943, 2003
Aug–Dec 1991 5-Month	47.3°F (8.5°C)	45.5°F (7.5°C)	1.8°F (1.0°C)	112th Coolest	Coolest since: 1990	1985
	47.3°F (8.5°C)	45.5°F (7.5°C)	1.8°F (1.0°C)	17th Warmest	Warmest since: 1967	1917, 2014
	Ties: 1950, 1998, 2003, 2021
Jul–Dec 1991 6-Month	50.3°F (10.2°C)	48.6°F (9.2°C)	1.7°F (1.0°C)	110th Coolest	Coolest since: 1990	1985
Jul–Dec 1991 6-Month	50.3°F (10.2°C)	48.6°F (9.2°C)	1.7°F (1.0°C)	19th Warmest	Warmest since: 1967	2014
Jun–Dec 1991 7-Month	50.9°F (10.5°C)	49.8°F (9.9°C)	1.1°F (0.6°C)	100th Coolest	Coolest since: 1990	1916
	50.9°F (10.5°C)	49.8°F (9.9°C)	1.1°F (0.6°C)	29th Warmest	Warmest since: 1988	2021
	Ties: 1950
May–Dec 1991 8-Month	50.4°F (10.2°C)	49.7°F (9.8°C)	0.7°F (0.4°C)	85th Coolest	Coolest since: 1990	1916
	50.4°F (10.2°C)	49.7°F (9.8°C)	0.7°F (0.4°C)	44th Warmest	Warmest since: 1989	2021
	Ties: 1949, 1950, 1969, 1986, 1995
Apr–Dec 1991 9-Month	49.4°F (9.7°C)	49.0°F (9.4°C)	0.4°F (0.3°C)	72nd Coolest	Coolest since: 1986	1916
	49.4°F (9.7°C)	49.0°F (9.4°C)	0.4°F (0.3°C)	57th Warmest	Warmest since: 1990	2021
	Ties: 1942, 1950, 1986, 2005, 2009
Mar–Dec 1991 10-Month	48.0°F (8.9°C)	47.7°F (8.7°C)	0.3°F (0.2°C)	75th Coolest	Coolest since: 1985	1916
	48.0°F (8.9°C)	47.7°F (8.7°C)	0.3°F (0.2°C)	54th Warmest	Warmest since: 1990	2015
	Ties: 1906, 1915, 1918, 1953, 1957, 1962, 1969, 1977, 1980
Feb–Dec 1991 11-Month	47.1°F (8.4°C)	46.1°F (7.8°C)	1.0°F (0.6°C)	98th Coolest	Coolest since: 1990	1955
	47.1°F (8.4°C)	46.1°F (7.8°C)	1.0°F (0.6°C)	31st Warmest	Warmest since: 1988	2015
	Ties: 1979, 1981, 1995
Jan–Dec 1991 12-Month	45.4°F (7.4°C)	44.5°F (6.9°C)	0.9°F (0.5°C)	95th Coolest	Coolest since: 1990	1916
	45.4°F (7.4°C)	44.5°F (6.9°C)	0.9°F (0.5°C)	34th Warmest	Warmest since: 1990	2015
	Ties: 1961, 1990, 1997
Jul 1990–Dec 1991 18-Month	46.5°F (8.1°C)	45.8°F (7.7°C)	0.7°F (0.4°C)	86th Coolest	Coolest since: 1989	1985
	46.5°F (8.1°C)	45.8°F (7.7°C)	0.7°F (0.4°C)	42nd Warmest	Warmest since: 1990	2015
	Ties: 1959, 1966, 2001, 2009
Jan 1990–Dec 1991 24-Month	45.4°F (7.4°C)	44.5°F (6.9°C)	0.9°F (0.5°C)	96th Coolest	Coolest since: 1990	1917
	45.4°F (7.4°C)	44.5°F (6.9°C)	0.9°F (0.5°C)	32nd Warmest	Warmest since: 1988	2015
	Ties: 1958, 1981
Jan 1989–Dec 1991 36-Month	45.1°F (7.3°C)	44.4°F (6.9°C)	0.7°F (0.4°C)	86th Coolest	Coolest since: 1987	1913
	45.1°F (7.3°C)	44.4°F (6.9°C)	0.7°F (0.4°C)	41st Warmest	Warmest since: 1990	2016
	Ties: 1960, 1981, 1995, 2009
Jan 1988–Dec 1991 48-Month	45.3°F (7.4°C)	44.4°F (6.9°C)	0.9°F (0.5°C)	96th Coolest	Coolest since: 1988	1913, 1914, 1919
	45.3°F (7.4°C)	44.4°F (6.9°C)	0.9°F (0.5°C)	30th Warmest	Warmest since: 1990	2016, 2017
	Ties: 1993, 2009, 2013
Jan 1987–Dec 1991 60-Month	45.5°F (7.5°C)	44.4°F (6.9°C)	1.1°F (0.6°C)	104th Coolest	Coolest since: 1989	1913
	45.5°F (7.5°C)	44.4°F (6.9°C)	1.1°F (0.6°C)	21st Warmest	Warmest since: 1990	2018
	Ties: 1941, 1942, 1995, 1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings