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, April 2018

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 2018 1-Month	45.1°F (7.3°C)	41.7°F (5.4°C)	3.4°F (1.9°C)	110th Coolest	Coolest since: 2017	1920
	45.1°F (7.3°C)	41.7°F (5.4°C)	3.4°F (1.9°C)	19th Warmest	Warmest since: 2012	1992
	Ties: 1977
Mar–Apr 2018 2-Month	40.6°F (4.8°C)	37.2°F (2.9°C)	3.4°F (1.9°C)	112th Coolest	Coolest since: 2016	1917
	40.6°F (4.8°C)	37.2°F (2.9°C)	3.4°F (1.9°C)	17th Warmest	Warmest since: 2017	1934, 1992
	Ties: 2001
Feb–Apr 2018 3-Month	36.6°F (2.6°C)	33.3°F (0.7°C)	3.3°F (1.9°C)	113th Coolest	Coolest since: 2014	1903
	36.6°F (2.6°C)	33.3°F (0.7°C)	3.3°F (1.9°C)	16th Warmest	Warmest since: 2017	1934
	Ties: 1990
Jan–Apr 2018 4-Month	34.6°F (1.4°C)	30.2°F (-1.0°C)	4.4°F (2.4°C)	120th Coolest	Coolest since: 2016	1917
Jan–Apr 2018 4-Month	34.6°F (1.4°C)	30.2°F (-1.0°C)	4.4°F (2.4°C)	9th Warmest	Warmest since: 2017	1934
Dec 2017–Apr 2018 5-Month	33.6°F (0.9°C)	28.9°F (-1.7°C)	4.7°F (2.6°C)	124th Coolest	Coolest since: 2017	1917
Dec 2017–Apr 2018 5-Month	33.6°F (0.9°C)	28.9°F (-1.7°C)	4.7°F (2.6°C)	4th Warmest	Warmest since: 2015	1934
Nov 2017–Apr 2018 6-Month	34.6°F (1.4°C)	29.4°F (-1.4°C)	5.2°F (2.8°C)	125th Coolest	Coolest since: 2017	1917
	34.6°F (1.4°C)	29.4°F (-1.4°C)	5.2°F (2.8°C)	3rd Warmest	Warmest since: 2015	1934
	Ties: 2015
Oct 2017–Apr 2018 7-Month	36.1°F (2.3°C)	31.6°F (-0.2°C)	4.5°F (2.5°C)	123rd Coolest	Coolest since: 2017	1917
Oct 2017–Apr 2018 7-Month	36.1°F (2.3°C)	31.6°F (-0.2°C)	4.5°F (2.5°C)	5th Warmest	Warmest since: 2015	1934
Sep 2017–Apr 2018 8-Month	38.9°F (3.8°C)	34.8°F (1.6°C)	4.1°F (2.2°C)	125th Coolest	Coolest since: 2017	1917
	38.9°F (3.8°C)	34.8°F (1.6°C)	4.1°F (2.2°C)	3rd Warmest	Warmest since: 2015	1934
	Ties: 1981
Aug 2017–Apr 2018 9-Month	41.9°F (5.5°C)	38.1°F (3.4°C)	3.8°F (2.1°C)	125th Coolest	Coolest since: 2017	1917
Aug 2017–Apr 2018 9-Month	41.9°F (5.5°C)	38.1°F (3.4°C)	3.8°F (2.1°C)	3rd Warmest	Warmest since: 2015	1934
Jul 2017–Apr 2018 10-Month	44.7°F (7.1°C)	40.9°F (4.9°C)	3.8°F (2.2°C)	125th Coolest	Coolest since: 2017	1917
Jul 2017–Apr 2018 10-Month	44.7°F (7.1°C)	40.9°F (4.9°C)	3.8°F (2.2°C)	3rd Warmest	Warmest since: 2015	1934
Jun 2017–Apr 2018 11-Month	46.6°F (8.1°C)	42.7°F (5.9°C)	3.9°F (2.2°C)	126th Coolest	Coolest since: 2017	1917
Jun 2017–Apr 2018 11-Month	46.6°F (8.1°C)	42.7°F (5.9°C)	3.9°F (2.2°C)	2nd Warmest	Warmest since: 1934	1934
May 2017–Apr 2018 12-Month	47.0°F (8.3°C)	43.4°F (6.3°C)	3.6°F (2.0°C)	127th Coolest	Coolest since: 2017	1917
	47.0°F (8.3°C)	43.4°F (6.3°C)	3.6°F (2.0°C)	1st Warmest	Warmest since: 2015	1934, 2015, 2018
	Ties: 1934, 2015
Nov 2016–Apr 2018 18-Month	42.6°F (5.9°C)	38.8°F (3.8°C)	3.8°F (2.1°C)	126th Coolest	Coolest since: 2017	1913
Nov 2016–Apr 2018 18-Month	42.6°F (5.9°C)	38.8°F (3.8°C)	3.8°F (2.1°C)	1st Warmest	Warmest to Date	2018
May 2016–Apr 2018 24-Month	46.8°F (8.2°C)	43.4°F (6.3°C)	3.4°F (1.9°C)	126th Coolest	Coolest since: 2017	1913
May 2016–Apr 2018 24-Month	46.8°F (8.2°C)	43.4°F (6.3°C)	3.4°F (1.9°C)	1st Warmest	Warmest to Date	2018
May 2015–Apr 2018 36-Month	46.4°F (8.0°C)	43.4°F (6.3°C)	3.0°F (1.7°C)	125th Coolest	Coolest since: 2017	1914
	46.4°F (8.0°C)	43.4°F (6.3°C)	3.0°F (1.7°C)	1st Warmest	Warmest since: 2017	2017, 2018, 2019
	Ties: 2017, 2019
May 2014–Apr 2018 48-Month	46.6°F (8.1°C)	43.4°F (6.3°C)	3.2°F (1.8°C)	124th Coolest	Coolest since: 2017	1899, 1915
May 2014–Apr 2018 48-Month	46.6°F (8.1°C)	43.4°F (6.3°C)	3.2°F (1.8°C)	1st Warmest	Warmest to Date	2018
May 2013–Apr 2018 60-Month	46.3°F (7.9°C)	43.3°F (6.3°C)	3.0°F (1.6°C)	123rd Coolest	Coolest since: 2017	1917
	46.3°F (7.9°C)	43.3°F (6.3°C)	3.0°F (1.6°C)	1st Warmest	Warmest to Date	2018, 2019
	Ties: 2019

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