Statewide Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Colorado

Average Temperature Rankings, May 1991

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1991 1-Month	53.5°F (11.9°C)	51.8°F (11.0°C)	1.7°F (0.9°C)	94th Coolest	Coolest since: 1990	1917
	53.5°F (11.9°C)	51.8°F (11.0°C)	1.7°F (0.9°C)	35th Warmest	Warmest since: 1989	1934
	Ties: 1900, 1962, 1970, 2007
Apr–May 1991 2-Month	47.7°F (8.7°C)	47.2°F (8.4°C)	0.5°F (0.3°C)	68th Coolest	Coolest since: 1984	1917
	47.7°F (8.7°C)	47.2°F (8.4°C)	0.5°F (0.3°C)	61st Warmest	Warmest since: 1990	1934
	Ties: 1998
Mar–May 1991 3-Month	43.4°F (6.3°C)	42.6°F (5.9°C)	0.8°F (0.4°C)	79th Coolest	Coolest since: 1988	1917
	43.4°F (6.3°C)	42.6°F (5.9°C)	0.8°F (0.4°C)	50th Warmest	Warmest since: 1990	2012
	Ties: 1956
Feb–May 1991 4-Month	40.7°F (4.8°C)	38.9°F (3.8°C)	1.8°F (1.0°C)	102nd Coolest	Coolest since: 1990	1917
	40.7°F (4.8°C)	38.9°F (3.8°C)	1.8°F (1.0°C)	27th Warmest	Warmest since: 1986	1934
	Ties: 1907
Jan–May 1991 5-Month	36.9°F (2.7°C)	35.8°F (2.1°C)	1.1°F (0.6°C)	90th Coolest	Coolest since: 1988	1917
	36.9°F (2.7°C)	35.8°F (2.1°C)	1.1°F (0.6°C)	39th Warmest	Warmest since: 1990	1934
	Ties: 1900, 1995, 2007
Dec 1990–May 1991 6-Month	34.2°F (1.2°C)	34.1°F (1.2°C)	0.1°F (0.0°C)	56th Coolest	Coolest since: 1988	1917
	34.2°F (1.2°C)	34.1°F (1.2°C)	0.1°F (0.0°C)	72nd Warmest	Warmest since: 1990	1934
	Ties: 1945, 1961, 1971
Nov 1990–May 1991 7-Month	34.5°F (1.4°C)	34.0°F (1.1°C)	0.5°F (0.3°C)	71st Coolest	Coolest since: 1988	1917
	34.5°F (1.4°C)	34.0°F (1.1°C)	0.5°F (0.3°C)	57th Warmest	Warmest since: 1990	1934
	Ties: 1921, 1985, 2001, 2013
Oct 1990–May 1991 8-Month	36.0°F (2.2°C)	35.5°F (1.9°C)	0.5°F (0.3°C)	71st Coolest	Coolest since: 1988	1917
	36.0°F (2.2°C)	35.5°F (1.9°C)	0.5°F (0.3°C)	57th Warmest	Warmest since: 1990	1934
	Ties: 1916, 1928, 1945, 1974, 2013
Sep 1990–May 1991 9-Month	38.8°F (3.8°C)	37.9°F (3.3°C)	0.9°F (0.5°C)	87th Coolest	Coolest since: 1988	1917
	38.8°F (3.8°C)	37.9°F (3.3°C)	0.9°F (0.5°C)	41st Warmest	Warmest since: 1990	1934
	Ties: 1946, 1956, 1959, 1998
Aug 1990–May 1991 10-Month	41.4°F (5.2°C)	40.7°F (4.8°C)	0.7°F (0.4°C)	84th Coolest	Coolest since: 1988	1917
	41.4°F (5.2°C)	40.7°F (4.8°C)	0.7°F (0.4°C)	44th Warmest	Warmest since: 1990	1934
	Ties: 1927, 1941, 1972, 1982, 1998
Jul 1990–May 1991 11-Month	43.7°F (6.5°C)	43.1°F (6.2°C)	0.6°F (0.3°C)	81st Coolest	Coolest since: 1988	1917
	43.7°F (6.5°C)	43.1°F (6.2°C)	0.6°F (0.3°C)	47th Warmest	Warmest since: 1990	1934
	Ties: 1907, 1972, 2008, 2019
Jun 1990–May 1991 12-Month	45.5°F (7.5°C)	44.6°F (7.0°C)	0.9°F (0.5°C)	88th Coolest	Coolest since: 1990	1917
	45.5°F (7.5°C)	44.6°F (7.0°C)	0.9°F (0.5°C)	40th Warmest	Warmest since: 1989	1934
	Ties: 1941, 1963
Dec 1989–May 1991 18-Month	42.0°F (5.6°C)	41.1°F (5.1°C)	0.9°F (0.5°C)	92nd Coolest	Coolest since: 1990	1913
	42.0°F (5.6°C)	41.1°F (5.1°C)	0.9°F (0.5°C)	35th Warmest	Warmest since: 1990	2018
	Ties: 1990, 2008, 2009
Jun 1989–May 1991 24-Month	45.4°F (7.4°C)	44.6°F (7.0°C)	0.8°F (0.4°C)	91st Coolest	Coolest since: 1989	1913
	45.4°F (7.4°C)	44.6°F (7.0°C)	0.8°F (0.4°C)	36th Warmest	Warmest since: 1990	2018
	Ties: 1911, 1995
Jun 1988–May 1991 36-Month	45.6°F (7.6°C)	44.6°F (7.0°C)	1.0°F (0.6°C)	97th Coolest	Coolest since: 1990	1914
	45.6°F (7.6°C)	44.6°F (7.0°C)	1.0°F (0.6°C)	29th Warmest	Warmest since: 1983	2018
	Ties: 1955, 1992, 1996
Jun 1987–May 1991 48-Month	45.3°F (7.4°C)	44.5°F (6.9°C)	0.8°F (0.5°C)	90th Coolest	Coolest since: 1990	1915
	45.3°F (7.4°C)	44.5°F (6.9°C)	0.8°F (0.5°C)	35th Warmest	Warmest since: 1989	2018
	Ties: 1983
Jun 1986–May 1991 60-Month	45.3°F (7.4°C)	44.6°F (7.0°C)	0.7°F (0.4°C)	92nd Coolest	Coolest since: 1989	1917
	45.3°F (7.4°C)	44.6°F (7.0°C)	0.7°F (0.4°C)	32nd Warmest	Warmest since: 1990	2018
	Ties: 1935, 1957, 1982, 1996

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on January 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings