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 1940

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 1940 1-Month	43.4°F (6.3°C)	41.7°F (5.4°C)	1.7°F (0.9°C)	90th Coolest	Coolest since: 1938	1920
	43.4°F (6.3°C)	41.7°F (5.4°C)	1.7°F (0.9°C)	39th Warmest	Warmest since: 1939	1992
	Ties: 1942, 2020
Mar–Apr 1940 2-Month	39.8°F (4.3°C)	37.2°F (2.9°C)	2.6°F (1.4°C)	105th Coolest	Coolest since: 1939	1917
Mar–Apr 1940 2-Month	39.8°F (4.3°C)	37.2°F (2.9°C)	2.6°F (1.4°C)	24th Warmest	Warmest since: 1934	1934, 1992
Feb–Apr 1940 3-Month	35.6°F (2.0°C)	33.4°F (0.8°C)	2.2°F (1.2°C)	101st Coolest	Coolest since: 1939	1903
	35.6°F (2.0°C)	33.4°F (0.8°C)	2.2°F (1.2°C)	28th Warmest	Warmest since: 1934	1934
	Ties: 1926, 1994, 2005, 2009
Jan–Apr 1940 4-Month	32.2°F (0.1°C)	30.3°F (-0.9°C)	1.9°F (1.0°C)	99th Coolest	Coolest since: 1939	1917
	32.2°F (0.1°C)	30.3°F (-0.9°C)	1.9°F (1.0°C)	30th Warmest	Warmest since: 1934	1934
	Ties: 1911, 2020, 2021
Dec 1939–Apr 1940 5-Month	31.7°F (-0.2°C)	28.8°F (-1.8°C)	2.9°F (1.6°C)	109th Coolest	Coolest since: 1939	1917
Dec 1939–Apr 1940 5-Month	31.7°F (-0.2°C)	28.8°F (-1.8°C)	2.9°F (1.6°C)	19th Warmest	Warmest since: 1934	1934
Nov 1939–Apr 1940 6-Month	32.4°F (0.2°C)	29.4°F (-1.4°C)	3.0°F (1.6°C)	113th Coolest	Coolest since: 1939	1917
	32.4°F (0.2°C)	29.4°F (-1.4°C)	3.0°F (1.6°C)	15th Warmest	Warmest since: 1934	1934
	Ties: 1999
Oct 1939–Apr 1940 7-Month	34.2°F (1.2°C)	31.7°F (-0.2°C)	2.5°F (1.4°C)	110th Coolest	Coolest since: 1939	1917
	34.2°F (1.2°C)	31.7°F (-0.2°C)	2.5°F (1.4°C)	18th Warmest	Warmest since: 1934	1934
	Ties: 2004
Sep 1939–Apr 1940 8-Month	37.1°F (2.8°C)	34.7°F (1.5°C)	2.4°F (1.3°C)	112th Coolest	Coolest since: 1939	1917
	37.1°F (2.8°C)	34.7°F (1.5°C)	2.4°F (1.3°C)	16th Warmest	Warmest since: 1934	1934
	Ties: 1990, 2004, 2005
Aug 1939–Apr 1940 9-Month	40.2°F (4.6°C)	38.1°F (3.4°C)	2.1°F (1.2°C)	111th Coolest	Coolest since: 1939	1917
	40.2°F (4.6°C)	38.1°F (3.4°C)	2.1°F (1.2°C)	17th Warmest	Warmest since: 1934	1934
	Ties: 1995
Jul 1939–Apr 1940 10-Month	43.0°F (6.1°C)	41.0°F (5.0°C)	2.0°F (1.1°C)	108th Coolest	Coolest since: 1939	1917
	43.0°F (6.1°C)	41.0°F (5.0°C)	2.0°F (1.1°C)	20th Warmest	Warmest since: 1934	1934
	Ties: 2006
Jun 1939–Apr 1940 11-Month	44.5°F (6.9°C)	42.7°F (5.9°C)	1.8°F (1.0°C)	105th Coolest	Coolest since: 1939	1917
	44.5°F (6.9°C)	42.7°F (5.9°C)	1.8°F (1.0°C)	23rd Warmest	Warmest since: 1934	1934
	Ties: 1959, 1986, 1989, 2005, 2007, 2019
May 1939–Apr 1940 12-Month	45.2°F (7.3°C)	43.4°F (6.3°C)	1.8°F (1.0°C)	103rd Coolest	Coolest since: 1939	1917
	45.2°F (7.3°C)	43.4°F (6.3°C)	1.8°F (1.0°C)	25th Warmest	Warmest since: 1935	1934, 2015, 2018
	Ties: 1935, 1954, 1986, 2005
Nov 1938–Apr 1940 18-Month	39.3°F (4.1°C)	38.7°F (3.7°C)	0.6°F (0.4°C)	73rd Coolest	Coolest since: 1939	1913
	39.3°F (4.1°C)	38.7°F (3.7°C)	0.6°F (0.4°C)	54th Warmest	Warmest since: 1936	2018
	Ties: 1943, 1951
May 1938–Apr 1940 24-Month	44.0°F (6.7°C)	43.5°F (6.4°C)	0.5°F (0.3°C)	83rd Coolest	Coolest since: 1939	1913
	44.0°F (6.7°C)	43.5°F (6.4°C)	0.5°F (0.3°C)	44th Warmest	Warmest since: 1936	2018
	Ties: 1934, 1955, 1961, 1983, 2011
May 1937–Apr 1940 36-Month	44.3°F (6.8°C)	43.4°F (6.3°C)	0.9°F (0.5°C)	89th Coolest	Coolest since: 1939	1914
	44.3°F (6.8°C)	43.4°F (6.3°C)	0.9°F (0.5°C)	37th Warmest	Warmest since: 1936	2017, 2018, 2019
	Ties: 1988, 1989
May 1936–Apr 1940 48-Month	43.9°F (6.6°C)	43.4°F (6.3°C)	0.5°F (0.3°C)	76th Coolest	Coolest since: 1939	1899, 1915
	43.9°F (6.6°C)	43.4°F (6.3°C)	0.5°F (0.3°C)	49th Warmest	Warmest since: 1938	2018
	Ties: 1935, 1957, 1960, 1978
May 1935–Apr 1940 60-Month	43.8°F (6.6°C)	43.3°F (6.3°C)	0.5°F (0.3°C)	74th Coolest	Coolest since: 1939	1917
	43.8°F (6.6°C)	43.3°F (6.3°C)	0.5°F (0.3°C)	50th Warmest	Warmest since: 1939	2018, 2019
	Ties: 1936, 1939, 1962

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 3, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings