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 1939

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1939 1-Month	34.7°F (1.5°C)	28.1°F (-2.2°C)	6.6°F (3.7°C)	127th Coolest	Coolest since: 1938	1990
	34.7°F (1.5°C)	28.1°F (-2.2°C)	6.6°F (3.7°C)	2nd Warmest	Warmest since: 1933	1917
	Ties: 1933
Nov–Dec 1939 2-Month	36.0°F (2.2°C)	31.4°F (-0.3°C)	4.6°F (2.5°C)	127th Coolest	Coolest since: 1938	1985
Nov–Dec 1939 2-Month	36.0°F (2.2°C)	31.4°F (-0.3°C)	4.6°F (2.5°C)	2nd Warmest	Warmest since: 1917	1917
Oct–Dec 1939 3-Month	39.4°F (4.1°C)	36.2°F (2.3°C)	3.2°F (1.8°C)	125th Coolest	Coolest since: 1938	1985
	39.4°F (4.1°C)	36.2°F (2.3°C)	3.2°F (1.8°C)	4th Warmest	Warmest since: 1937	1917
	Ties: 1937
Sep–Dec 1939 4-Month	43.8°F (6.6°C)	41.0°F (5.0°C)	2.8°F (1.6°C)	124th Coolest	Coolest since: 1938	1985
Sep–Dec 1939 4-Month	43.8°F (6.6°C)	41.0°F (5.0°C)	2.8°F (1.6°C)	5th Warmest	Warmest since: 1937	1917
Aug–Dec 1939 5-Month	48.0°F (8.9°C)	45.4°F (7.4°C)	2.6°F (1.5°C)	125th Coolest	Coolest since: 1938	1985
Aug–Dec 1939 5-Month	48.0°F (8.9°C)	45.4°F (7.4°C)	2.6°F (1.5°C)	4th Warmest	Warmest since: 1917	1917, 2014
Jul–Dec 1939 6-Month	51.0°F (10.6°C)	48.7°F (9.3°C)	2.3°F (1.3°C)	125th Coolest	Coolest since: 1938	1985
	51.0°F (10.6°C)	48.7°F (9.3°C)	2.3°F (1.3°C)	4th Warmest	Warmest since: 1917	2014
	Ties: 2012, 2022
Jun–Dec 1939 7-Month	51.5°F (10.8°C)	49.8°F (9.9°C)	1.7°F (0.9°C)	117th Coolest	Coolest since: 1938	1916
	51.5°F (10.8°C)	49.8°F (9.9°C)	1.7°F (0.9°C)	12th Warmest	Warmest since: 1937	2021
	Ties: 1933, 1937, 1998
May–Dec 1939 8-Month	51.6°F (10.9°C)	49.8°F (9.9°C)	1.8°F (1.0°C)	121st Coolest	Coolest since: 1938	1916
	51.6°F (10.9°C)	49.8°F (9.9°C)	1.8°F (1.0°C)	8th Warmest	Warmest since: 1934	2021
	Ties: 1934, 1940, 2018
Apr–Dec 1939 9-Month	51.0°F (10.6°C)	49.0°F (9.4°C)	2.0°F (1.2°C)	123rd Coolest	Coolest since: 1938	1916
	51.0°F (10.6°C)	49.0°F (9.4°C)	2.0°F (1.2°C)	6th Warmest	Warmest since: 1934	2021
	Ties: 1987
Mar–Dec 1939 10-Month	49.6°F (9.8°C)	47.7°F (8.7°C)	1.9°F (1.1°C)	121st Coolest	Coolest since: 1938	1916
	49.6°F (9.8°C)	47.7°F (8.7°C)	1.9°F (1.1°C)	8th Warmest	Warmest since: 1934	2015
	Ties: 1992, 2003, 2016, 2017
Feb–Dec 1939 11-Month	47.4°F (8.6°C)	46.1°F (7.8°C)	1.3°F (0.8°C)	109th Coolest	Coolest since: 1938	1955
	47.4°F (8.6°C)	46.1°F (7.8°C)	1.3°F (0.8°C)	20th Warmest	Warmest since: 1934	2015
	Ties: 1925, 2013
Jan–Dec 1939 12-Month	46.0°F (7.8°C)	44.5°F (6.9°C)	1.5°F (0.9°C)	111th Coolest	Coolest since: 1938	1916
	46.0°F (7.8°C)	44.5°F (6.9°C)	1.5°F (0.9°C)	18th Warmest	Warmest since: 1934	2015
	Ties: 2006, 2007
Jul 1938–Dec 1939 18-Month	47.1°F (8.4°C)	45.8°F (7.7°C)	1.3°F (0.7°C)	108th Coolest	Coolest since: 1938	1985
	47.1°F (8.4°C)	45.8°F (7.7°C)	1.3°F (0.7°C)	20th Warmest	Warmest since: 1934	2015
	Ties: 1941, 1967, 1987, 2005, 2006
Jan 1938–Dec 1939 24-Month	45.6°F (7.6°C)	44.5°F (6.9°C)	1.1°F (0.7°C)	102nd Coolest	Coolest since: 1938	1917
	45.6°F (7.6°C)	44.5°F (6.9°C)	1.1°F (0.7°C)	26th Warmest	Warmest since: 1935	2015
	Ties: 1959, 2019
Jan 1937–Dec 1939 36-Month	45.0°F (7.2°C)	44.4°F (6.9°C)	0.6°F (0.3°C)	81st Coolest	Coolest since: 1938	1913
	45.0°F (7.2°C)	44.4°F (6.9°C)	0.6°F (0.3°C)	46th Warmest	Warmest since: 1936	2016
	Ties: 1959, 1963
Jan 1936–Dec 1939 48-Month	44.9°F (7.2°C)	44.4°F (6.9°C)	0.5°F (0.3°C)	80th Coolest	Coolest since: 1938	1913, 1914, 1919
	44.9°F (7.2°C)	44.4°F (6.9°C)	0.5°F (0.3°C)	46th Warmest	Warmest since: 1937	2016, 2017
	Ties: 1926, 1981
Jan 1935–Dec 1939 60-Month	44.7°F (7.1°C)	44.4°F (6.9°C)	0.3°F (0.2°C)	72nd Coolest	Coolest since: 1933	1913
	44.7°F (7.1°C)	44.4°F (6.9°C)	0.3°F (0.2°C)	53rd Warmest	Warmest since: 1938	2018
	Ties: 1927, 1963, 1968, 1983

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 28, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings