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 1909

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1909 1-Month	21.7°F (-5.7°C)	28.1°F (-2.2°C)	-6.4°F (-3.5°C)	7th Coolest	Coolest since: 1909	1990
	21.7°F (-5.7°C)	28.1°F (-2.2°C)	-6.4°F (-3.5°C)	122nd Warmest	Warmest since: 1908	1917
	Ties: 1948
Nov–Dec 1909 2-Month	28.8°F (-1.8°C)	31.3°F (-0.4°C)	-2.5°F (-1.4°C)	15th Coolest	Coolest since: 1898	1985
	28.8°F (-1.8°C)	31.3°F (-0.4°C)	-2.5°F (-1.4°C)	114th Warmest	Warmest since: 1908	1917
	Ties: 1935, 1951, 1955, 1992, 1994
Oct–Dec 1909 3-Month	34.4°F (1.3°C)	36.2°F (2.3°C)	-1.8°F (-1.0°C)	21st Coolest	Coolest since: 1905	1985
	34.4°F (1.3°C)	36.2°F (2.3°C)	-1.8°F (-1.0°C)	108th Warmest	Warmest since: 1908	1917
	Ties: 1922
Sep–Dec 1909 4-Month	39.9°F (4.4°C)	41.1°F (5.1°C)	-1.2°F (-0.7°C)	26th Coolest	Coolest since: 1905	1985
Sep–Dec 1909 4-Month	39.9°F (4.4°C)	41.1°F (5.1°C)	-1.2°F (-0.7°C)	103rd Warmest	Warmest since: 1908	1917
Aug–Dec 1909 5-Month	44.3°F (6.8°C)	45.4°F (7.4°C)	-1.1°F (-0.6°C)	19th Coolest	Coolest since: 1905	1985
	44.3°F (6.8°C)	45.4°F (7.4°C)	-1.1°F (-0.6°C)	110th Warmest	Warmest since: 1908	1917, 2014
	Ties: 1964, 1968, 1971
Jul–Dec 1909 6-Month	47.2°F (8.4°C)	48.6°F (9.2°C)	-1.4°F (-0.8°C)	12th Coolest	Coolest since: 1898	1985
	47.2°F (8.4°C)	48.6°F (9.2°C)	-1.4°F (-0.8°C)	117th Warmest	Warmest since: 1908	2014
	Ties: 1898
Jun–Dec 1909 7-Month	48.5°F (9.2°C)	49.7°F (9.8°C)	-1.2°F (-0.6°C)	13th Coolest	Coolest since: 1902	1916
Jun–Dec 1909 7-Month	48.5°F (9.2°C)	49.7°F (9.8°C)	-1.2°F (-0.6°C)	116th Warmest	Warmest since: 1908	2021
May–Dec 1909 8-Month	48.4°F (9.1°C)	49.8°F (9.9°C)	-1.4°F (-0.8°C)	10th Coolest	Coolest since: 1895	1916
May–Dec 1909 8-Month	48.4°F (9.1°C)	49.8°F (9.9°C)	-1.4°F (-0.8°C)	119th Warmest	Warmest since: 1908	2021
Apr–Dec 1909 9-Month	47.4°F (8.6°C)	49.0°F (9.4°C)	-1.6°F (-0.8°C)	8th Coolest	Coolest since: 1909	1916
Apr–Dec 1909 9-Month	47.4°F (8.6°C)	49.0°F (9.4°C)	-1.6°F (-0.8°C)	121st Warmest	Warmest since: 1908	2021
Mar–Dec 1909 10-Month	46.3°F (7.9°C)	47.7°F (8.7°C)	-1.4°F (-0.8°C)	9th Coolest	Coolest since: 1902	1916
	46.3°F (7.9°C)	47.7°F (8.7°C)	-1.4°F (-0.8°C)	120th Warmest	Warmest since: 1908	2015
	Ties: 1895, 1902, 1919, 1984
Feb–Dec 1909 11-Month	45.0°F (7.2°C)	46.1°F (7.8°C)	-1.1°F (-0.6°C)	16th Coolest	Coolest since: 1903	1955
	45.0°F (7.2°C)	46.1°F (7.8°C)	-1.1°F (-0.6°C)	113th Warmest	Warmest since: 1908	2015
	Ties: 1929, 1971, 1982
Jan–Dec 1909 12-Month	43.2°F (6.2°C)	44.4°F (6.9°C)	-1.2°F (-0.7°C)	14th Coolest	Coolest since: 1903	1916
Jan–Dec 1909 12-Month	43.2°F (6.2°C)	44.4°F (6.9°C)	-1.2°F (-0.7°C)	115th Warmest	Warmest since: 1908	2015
Jul 1908–Dec 1909 18-Month	44.9°F (7.2°C)	45.8°F (7.7°C)	-0.9°F (-0.5°C)	17th Coolest	Coolest since: 1903	1985
	44.9°F (7.2°C)	45.8°F (7.7°C)	-0.9°F (-0.5°C)	111th Warmest	Warmest since: 1908	2015
	Ties: 1896, 1993
Jan 1908–Dec 1909 24-Month	43.6°F (6.4°C)	44.4°F (6.9°C)	-0.8°F (-0.5°C)	17th Coolest	Coolest since: 1903	1917
	43.6°F (6.4°C)	44.4°F (6.9°C)	-0.8°F (-0.5°C)	111th Warmest	Warmest since: 1908	2015
	Ties: 1911, 1929, 1951
Jan 1907–Dec 1909 36-Month	43.7°F (6.5°C)	44.4°F (6.9°C)	-0.7°F (-0.4°C)	20th Coolest	Coolest since: 1903	1913
	43.7°F (6.5°C)	44.4°F (6.9°C)	-0.7°F (-0.4°C)	107th Warmest	Warmest since: 1908	2016
	Ties: 1916, 1921, 1931
Jan 1906–Dec 1909 48-Month	44.0°F (6.7°C)	44.4°F (6.9°C)	-0.4°F (-0.2°C)	28th Coolest	Coolest since: 1905	1913, 1914, 1919
	44.0°F (6.7°C)	44.4°F (6.9°C)	-0.4°F (-0.2°C)	98th Warmest	Warmest since: 1908	2016, 2017
	Ties: 1901, 1902, 1903, 1910, 1921, 1925, 1949, 1956
Jan 1905–Dec 1909 60-Month	44.0°F (6.7°C)	44.4°F (6.9°C)	-0.4°F (-0.2°C)	28th Coolest	Coolest since: 1905	1913
	44.0°F (6.7°C)	44.4°F (6.9°C)	-0.4°F (-0.2°C)	97th Warmest	Warmest since: 1908	2018
	Ties: 1901, 1955, 1956, 1957

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings