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 1918

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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 1918 1-Month	20.4°F (-6.4°C)	23.0°F (-5.0°C)	-2.6°F (-1.4°C)	32nd Coolest	Coolest since: 1916	1909
	20.4°F (-6.4°C)	23.0°F (-5.0°C)	-2.6°F (-1.4°C)	97th Warmest	Warmest since: 1917	1980
	Ties: 1902
Nov–Dec 1918 2-Month	24.6°F (-4.1°C)	27.5°F (-2.5°C)	-2.9°F (-1.6°C)	20th Coolest	Coolest since: 1916	1895
	24.6°F (-4.1°C)	27.5°F (-2.5°C)	-2.9°F (-1.6°C)	109th Warmest	Warmest since: 1917	2017
	Ties: 1928
Oct–Dec 1918 3-Month	32.1°F (0.1°C)	33.5°F (0.8°C)	-1.4°F (-0.7°C)	31st Coolest	Coolest since: 1916	1898
	32.1°F (0.1°C)	33.5°F (0.8°C)	-1.4°F (-0.7°C)	98th Warmest	Warmest since: 1917	1950, 2017
	Ties: 1923, 1968
Sep–Dec 1918 4-Month	38.1°F (3.4°C)	39.2°F (4.0°C)	-1.1°F (-0.6°C)	30th Coolest	Coolest since: 1916	1898, 1912
	38.1°F (3.4°C)	39.2°F (4.0°C)	-1.1°F (-0.6°C)	99th Warmest	Warmest since: 1917	2021
	Ties: 1897, 1902, 1982, 1984
Aug–Dec 1918 5-Month	43.1°F (6.2°C)	44.3°F (6.8°C)	-1.2°F (-0.6°C)	24th Coolest	Coolest since: 1916	1912
	43.1°F (6.2°C)	44.3°F (6.8°C)	-1.2°F (-0.6°C)	105th Warmest	Warmest since: 1917	2021
	Ties: 1993
Jul–Dec 1918 6-Month	46.8°F (8.2°C)	48.1°F (8.9°C)	-1.3°F (-0.7°C)	22nd Coolest	Coolest since: 1916	1912
	46.8°F (8.2°C)	48.1°F (8.9°C)	-1.3°F (-0.7°C)	107th Warmest	Warmest since: 1917	2021
	Ties: 1897, 1928, 1951
Jun–Dec 1918 7-Month	49.3°F (9.6°C)	49.9°F (9.9°C)	-0.6°F (-0.3°C)	39th Coolest	Coolest since: 1916	1912
	49.3°F (9.6°C)	49.9°F (9.9°C)	-0.6°F (-0.3°C)	90th Warmest	Warmest since: 1917	2021
	Ties: 1896, 1941, 1948, 1970, 1978, 1992
May–Dec 1918 8-Month	49.4°F (9.7°C)	50.0°F (10.0°C)	-0.6°F (-0.3°C)	36th Coolest	Coolest since: 1916	1912
	49.4°F (9.7°C)	50.0°F (10.0°C)	-0.6°F (-0.3°C)	93rd Warmest	Warmest since: 1917	2021
	Ties: 1896, 1914
Apr–Dec 1918 9-Month	48.2°F (9.0°C)	49.1°F (9.5°C)	-0.9°F (-0.5°C)	26th Coolest	Coolest since: 1916	1912
	48.2°F (9.0°C)	49.1°F (9.5°C)	-0.9°F (-0.5°C)	103rd Warmest	Warmest since: 1917	2021
	Ties: 1913, 1929, 1982
Mar–Dec 1918 10-Month	47.0°F (8.3°C)	47.5°F (8.6°C)	-0.5°F (-0.3°C)	44th Coolest	Coolest since: 1917	1912
	47.0°F (8.3°C)	47.5°F (8.6°C)	-0.5°F (-0.3°C)	85th Warmest	Warmest since: 1914	2012
	Ties: 1931, 1952
Feb–Dec 1918 11-Month	44.9°F (7.2°C)	45.5°F (7.5°C)	-0.6°F (-0.3°C)	42nd Coolest	Coolest since: 1917	1912
	44.9°F (7.2°C)	45.5°F (7.5°C)	-0.6°F (-0.3°C)	87th Warmest	Warmest since: 1914	2017
	Ties: 1914, 1927, 1942
Jan–Dec 1918 12-Month	42.9°F (6.1°C)	43.4°F (6.3°C)	-0.5°F (-0.2°C)	41st Coolest	Coolest since: 1917	1895, 1912
	42.9°F (6.1°C)	43.4°F (6.3°C)	-0.5°F (-0.2°C)	88th Warmest	Warmest since: 1914	2012
	Ties: 1965, 1993
Jul 1917–Dec 1918 18-Month	45.1°F (7.3°C)	45.0°F (7.2°C)	0.1°F (0.1°C)	58th Coolest	Coolest since: 1917	1912
	45.1°F (7.3°C)	45.0°F (7.2°C)	0.1°F (0.1°C)	70th Warmest	Warmest since: 1910	1934
	Ties: 1902, 1983
Jan 1917–Dec 1918 24-Month	42.2°F (5.7°C)	43.4°F (6.3°C)	-1.2°F (-0.6°C)	14th Coolest	Coolest since: 1917	1913
	42.2°F (5.7°C)	43.4°F (6.3°C)	-1.2°F (-0.6°C)	114th Warmest	Warmest since: 1915	2018
	Ties: 1923
Jan 1916–Dec 1918 36-Month	42.0°F (5.6°C)	43.4°F (6.3°C)	-1.4°F (-0.7°C)	6th Coolest	Coolest since: 1917	1899, 1913
Jan 1916–Dec 1918 36-Month	42.0°F (5.6°C)	43.4°F (6.3°C)	-1.4°F (-0.7°C)	121st Warmest	Warmest since: 1916	2017
Jan 1915–Dec 1918 48-Month	42.1°F (5.6°C)	43.4°F (6.3°C)	-1.3°F (-0.7°C)	5th Coolest	Coolest since: 1917	1898
	42.1°F (5.6°C)	43.4°F (6.3°C)	-1.3°F (-0.7°C)	121st Warmest	Warmest since: 1917	2018
	Ties: 1917, 1919, 1920
Jan 1914–Dec 1918 60-Month	42.3°F (5.7°C)	43.4°F (6.3°C)	-1.1°F (-0.6°C)	8th Coolest	Coolest since: 1917	1899
	42.3°F (5.7°C)	43.4°F (6.3°C)	-1.1°F (-0.6°C)	117th Warmest	Warmest since: 1914	2018
	Ties: 1913

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published March 2023, retrieved on March 23, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings