Regional Rankings

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Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Upper Colorado River Basin

Average Temperature Rankings, December 1901

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Record Coolest

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1901 1-Month	24.2°F (-4.3°C)	23.0°F (-5.0°C)	1.2°F (0.7°C)	81st Coolest	Coolest since: 1899	1909
	24.2°F (-4.3°C)	23.0°F (-5.0°C)	1.2°F (0.7°C)	48th Warmest	Warmest since: 1900	1980
	Ties: 1936, 1944, 2019
Nov–Dec 1901 2-Month	29.6°F (-1.3°C)	27.5°F (-2.5°C)	2.1°F (1.2°C)	98th Coolest	Coolest since: 1900	1895
	29.6°F (-1.3°C)	27.5°F (-2.5°C)	2.1°F (1.2°C)	31st Warmest	Warmest to Date	2017
	Ties: 2005, 2006
Oct–Dec 1901 3-Month	35.2°F (1.8°C)	33.5°F (0.8°C)	1.7°F (1.0°C)	98th Coolest	Coolest since: 1900	1898
	35.2°F (1.8°C)	33.5°F (0.8°C)	1.7°F (1.0°C)	31st Warmest	Warmest to Date	1950, 2017
	Ties: 2015
Sep–Dec 1901 4-Month	40.1°F (4.5°C)	39.2°F (4.0°C)	0.9°F (0.5°C)	82nd Coolest	Coolest since: 1900	1898, 1912
Sep–Dec 1901 4-Month	40.1°F (4.5°C)	39.2°F (4.0°C)	0.9°F (0.5°C)	47th Warmest	Warmest to Date	2021
Aug–Dec 1901 5-Month	45.3°F (7.4°C)	44.3°F (6.8°C)	1.0°F (0.6°C)	87th Coolest	Coolest since: 1900	1912
	45.3°F (7.4°C)	44.3°F (6.8°C)	1.0°F (0.6°C)	42nd Warmest	Warmest to Date	2021
	Ties: 1944, 1953, 1994
Jul–Dec 1901 6-Month	49.3°F (9.6°C)	48.1°F (8.9°C)	1.2°F (0.7°C)	90th Coolest	Coolest since: 1900	1912
	49.3°F (9.6°C)	48.1°F (8.9°C)	1.2°F (0.7°C)	39th Warmest	Warmest to Date	2021
	Ties: 1994, 2002
Jun–Dec 1901 7-Month	50.6°F (10.3°C)	49.9°F (9.9°C)	0.7°F (0.4°C)	78th Coolest	Coolest since: 1900	1912
	50.6°F (10.3°C)	49.9°F (9.9°C)	0.7°F (0.4°C)	51st Warmest	Warmest to Date	2021
	Ties: 1942, 1966, 1990
May–Dec 1901 8-Month	51.0°F (10.6°C)	50.0°F (10.0°C)	1.0°F (0.6°C)	88th Coolest	Coolest since: 1900	1912
	51.0°F (10.6°C)	50.0°F (10.0°C)	1.0°F (0.6°C)	41st Warmest	Warmest to Date	2021
	Ties: 1960, 1966
Apr–Dec 1901 9-Month	49.9°F (9.9°C)	49.1°F (9.5°C)	0.8°F (0.4°C)	84th Coolest	Coolest since: 1900	1912
	49.9°F (9.9°C)	49.1°F (9.5°C)	0.8°F (0.4°C)	45th Warmest	Warmest to Date	2021
	Ties: 1966, 2019
Mar–Dec 1901 10-Month	48.0°F (8.9°C)	47.5°F (8.6°C)	0.5°F (0.3°C)	73rd Coolest	Coolest since: 1900	1912
	48.0°F (8.9°C)	47.5°F (8.6°C)	0.5°F (0.3°C)	56th Warmest	Warmest to Date	2012
	Ties: 1997
Feb–Dec 1901 11-Month	46.0°F (7.8°C)	45.5°F (7.5°C)	0.5°F (0.3°C)	79th Coolest	Coolest since: 1900	1912
	46.0°F (7.8°C)	45.5°F (7.5°C)	0.5°F (0.3°C)	50th Warmest	Warmest to Date	2017
	Ties: 2019
Jan–Dec 1901 12-Month	44.0°F (6.7°C)	43.4°F (6.3°C)	0.6°F (0.4°C)	80th Coolest	Coolest since: 1899	1895, 1912
	44.0°F (6.7°C)	43.4°F (6.3°C)	0.6°F (0.4°C)	49th Warmest	Warmest since: 1900	2012
	Ties: 1907, 1926, 1972, 1997, 2019
Jul 1900–Dec 1901 18-Month	45.2°F (7.3°C)	45.0°F (7.2°C)	0.2°F (0.1°C)	61st Coolest	Coolest since: 1900	1912
	45.2°F (7.3°C)	45.0°F (7.2°C)	0.2°F (0.1°C)	67th Warmest	Warmest to Date	1934
	Ties: 1907, 1926, 1941, 1966, 1982, 1991
Jan 1900–Dec 1901 24-Month	44.1°F (6.7°C)	43.4°F (6.3°C)	0.7°F (0.4°C)	80th Coolest	Coolest since: 1900	1913
	44.1°F (6.7°C)	43.4°F (6.3°C)	0.7°F (0.4°C)	48th Warmest	Warmest to Date	2018
	Ties: 2009
Jan 1899–Dec 1901 36-Month	43.3°F (6.3°C)	43.4°F (6.3°C)	-0.1°F (0.0°C)	51st Coolest	Coolest since: 1900	1899, 1913
	43.3°F (6.3°C)	43.4°F (6.3°C)	-0.1°F (0.0°C)	76th Warmest	Warmest to Date	2017
	Ties: 1946, 1971
Jan 1898–Dec 1901 48-Month	42.8°F (6.0°C)	43.4°F (6.3°C)	-0.6°F (-0.3°C)	27th Coolest	Coolest since: 1900	1898
	42.8°F (6.0°C)	43.4°F (6.3°C)	-0.6°F (-0.3°C)	99th Warmest	Warmest to Date	2018
	Ties: 1904, 1922, 1926, 1952
Jan 1897–Dec 1901 60-Month	42.7°F (5.9°C)	43.4°F (6.3°C)	-0.7°F (-0.4°C)	19th Coolest	Coolest since: 1900	1899
	42.7°F (5.9°C)	43.4°F (6.3°C)	-0.7°F (-0.4°C)	106th Warmest	Warmest to Date	2018
	Ties: 1905, 1907, 1908, 1926, 1931

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published March 2023, retrieved on March 25, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings