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.

Upper Colorado River Basin

Average Temperature Rankings, December 2018

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 2018 1-Month	23.3°F (-4.8°C)	23.0°F (-5.0°C)	0.3°F (0.2°C)	59th Coolest	Coolest since: 2015	1909
December 2018 1-Month	23.3°F (-4.8°C)	23.0°F (-5.0°C)	0.3°F (0.2°C)	70th Warmest	Warmest since: 2017	1980
Nov–Dec 2018 2-Month	27.2°F (-2.7°C)	27.4°F (-2.6°C)	-0.2°F (-0.1°C)	51st Coolest	Coolest since: 2015	1895
	27.2°F (-2.7°C)	27.4°F (-2.6°C)	-0.2°F (-0.1°C)	78th Warmest	Warmest since: 2017	2017
	Ties: 1903, 1927, 1935, 2015
Oct–Dec 2018 3-Month	33.0°F (0.6°C)	33.5°F (0.8°C)	-0.5°F (-0.2°C)	48th Coolest	Coolest since: 2013	1898
	33.0°F (0.6°C)	33.5°F (0.8°C)	-0.5°F (-0.2°C)	81st Warmest	Warmest since: 2017	1950, 2017
	Ties: 1925, 1985, 2019
Sep–Dec 2018 4-Month	40.2°F (4.6°C)	39.2°F (4.0°C)	1.0°F (0.6°C)	86th Coolest	Coolest since: 2013	1898, 1912
	40.2°F (4.6°C)	39.2°F (4.0°C)	1.0°F (0.6°C)	43rd Warmest	Warmest since: 2017	2021
	Ties: 1960, 1987, 2004
Aug–Dec 2018 5-Month	45.6°F (7.6°C)	44.3°F (6.8°C)	1.3°F (0.8°C)	94th Coolest	Coolest since: 2013	1912
	45.6°F (7.6°C)	44.3°F (6.8°C)	1.3°F (0.8°C)	35th Warmest	Warmest since: 2017	2021
	Ties: 1942, 1988, 2019
Jul–Dec 2018 6-Month	49.9°F (9.9°C)	48.1°F (8.9°C)	1.8°F (1.0°C)	105th Coolest	Coolest since: 2015	1912
	49.9°F (9.9°C)	48.1°F (8.9°C)	1.8°F (1.0°C)	24th Warmest	Warmest since: 2017	2021
	Ties: 1934
Jun–Dec 2018 7-Month	52.1°F (11.2°C)	49.8°F (9.9°C)	2.3°F (1.3°C)	118th Coolest	Coolest since: 2015	1912
	52.1°F (11.2°C)	49.8°F (9.9°C)	2.3°F (1.3°C)	11th Warmest	Warmest since: 2017	2021
	Ties: 2010, 2014, 2022
May–Dec 2018 8-Month	52.6°F (11.4°C)	50.0°F (10.0°C)	2.6°F (1.4°C)	124th Coolest	Coolest since: 2016	1912
	52.6°F (11.4°C)	50.0°F (10.0°C)	2.6°F (1.4°C)	5th Warmest	Warmest since: 2017	2021
	Ties: 2001, 2003, 2016
Apr–Dec 2018 9-Month	51.8°F (11.0°C)	49.1°F (9.5°C)	2.7°F (1.5°C)	125th Coolest	Coolest since: 2016	1912
	51.8°F (11.0°C)	49.1°F (9.5°C)	2.7°F (1.5°C)	4th Warmest	Warmest since: 2017	2021
	Ties: 2020
Mar–Dec 2018 10-Month	50.2°F (10.1°C)	47.4°F (8.6°C)	2.8°F (1.5°C)	122nd Coolest	Coolest since: 2016	1912
	50.2°F (10.1°C)	47.4°F (8.6°C)	2.8°F (1.5°C)	7th Warmest	Warmest since: 2017	2012
	Ties: 2001, 2016
Feb–Dec 2018 11-Month	48.3°F (9.1°C)	45.5°F (7.5°C)	2.8°F (1.6°C)	122nd Coolest	Coolest since: 2016	1912
	48.3°F (9.1°C)	45.5°F (7.5°C)	2.8°F (1.6°C)	7th Warmest	Warmest since: 2017	2017
	Ties: 2016
Jan–Dec 2018 12-Month	46.6°F (8.1°C)	43.4°F (6.3°C)	3.2°F (1.8°C)	123rd Coolest	Coolest since: 2016	1895, 1912
Jan–Dec 2018 12-Month	46.6°F (8.1°C)	43.4°F (6.3°C)	3.2°F (1.8°C)	6th Warmest	Warmest since: 2017	2012
Jul 2017–Dec 2018 18-Month	48.2°F (9.0°C)	45.0°F (7.2°C)	3.2°F (1.8°C)	126th Coolest	Coolest since: 2017	1912
	48.2°F (9.0°C)	45.0°F (7.2°C)	3.2°F (1.8°C)	2nd Warmest	Warmest since: 2017	1934
	Ties: 2017
Jan 2017–Dec 2018 24-Month	46.9°F (8.3°C)	43.5°F (6.4°C)	3.4°F (1.9°C)	127th Coolest	Coolest since: 2017	1913
Jan 2017–Dec 2018 24-Month	46.9°F (8.3°C)	43.5°F (6.4°C)	3.4°F (1.9°C)	1st Warmest	Warmest to Date	2018
Jan 2016–Dec 2018 36-Month	46.6°F (8.1°C)	43.4°F (6.3°C)	3.2°F (1.8°C)	125th Coolest	Coolest since: 2016	1899, 1913
Jan 2016–Dec 2018 36-Month	46.6°F (8.1°C)	43.4°F (6.3°C)	3.2°F (1.8°C)	2nd Warmest	Warmest since: 2017	2017
Jan 2015–Dec 2018 48-Month	46.6°F (8.1°C)	43.3°F (6.3°C)	3.3°F (1.8°C)	125th Coolest	Coolest since: 2017	1898
Jan 2015–Dec 2018 48-Month	46.6°F (8.1°C)	43.3°F (6.3°C)	3.3°F (1.8°C)	1st Warmest	Warmest to Date	2018
Jan 2014–Dec 2018 60-Month	46.5°F (8.1°C)	43.4°F (6.3°C)	3.1°F (1.8°C)	124th Coolest	Coolest since: 2017	1899
Jan 2014–Dec 2018 60-Month	46.5°F (8.1°C)	43.4°F (6.3°C)	3.1°F (1.8°C)	1st Warmest	Warmest to Date	2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 2, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings