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.

Wyoming

Average Temperature Rankings, December 1999

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1999 1-Month	25.2°F (-3.8°C)	20.6°F (-6.3°C)	4.6°F (2.5°C)	115th Coolest	Coolest since: 1998	1909, 1983
	25.2°F (-3.8°C)	20.6°F (-6.3°C)	4.6°F (2.5°C)	14th Warmest	Warmest since: 1994	1980
	Ties: 1959
Nov–Dec 1999 2-Month	32.0°F (0.0°C)	24.8°F (-4.0°C)	7.2°F (4.0°C)	128th Coolest	Coolest since: 1998	1978
Nov–Dec 1999 2-Month	32.0°F (0.0°C)	24.8°F (-4.0°C)	7.2°F (4.0°C)	1st Warmest	Warmest to Date	1999
Oct–Dec 1999 3-Month	36.3°F (2.4°C)	30.7°F (-0.7°C)	5.6°F (3.1°C)	128th Coolest	Coolest since: 1998	1919
Oct–Dec 1999 3-Month	36.3°F (2.4°C)	30.7°F (-0.7°C)	5.6°F (3.1°C)	1st Warmest	Warmest to Date	1999
Sep–Dec 1999 4-Month	40.0°F (4.4°C)	36.4°F (2.4°C)	3.6°F (2.0°C)	124th Coolest	Coolest since: 1998	1919
Sep–Dec 1999 4-Month	40.0°F (4.4°C)	36.4°F (2.4°C)	3.6°F (2.0°C)	5th Warmest	Warmest since: 1963	2021
Aug–Dec 1999 5-Month	45.0°F (7.2°C)	41.8°F (5.4°C)	3.2°F (1.8°C)	125th Coolest	Coolest since: 1998	1916, 1985
	45.0°F (7.2°C)	41.8°F (5.4°C)	3.2°F (1.8°C)	4th Warmest	Warmest since: 1963	2021
	Ties: 1939
Jul–Dec 1999 6-Month	48.5°F (9.2°C)	45.7°F (7.6°C)	2.8°F (1.6°C)	122nd Coolest	Coolest since: 1998	1911
Jul–Dec 1999 6-Month	48.5°F (9.2°C)	45.7°F (7.6°C)	2.8°F (1.6°C)	7th Warmest	Warmest since: 1963	2021
Jun–Dec 1999 7-Month	49.7°F (9.8°C)	47.5°F (8.6°C)	2.2°F (1.2°C)	116th Coolest	Coolest since: 1998	1916
Jun–Dec 1999 7-Month	49.7°F (9.8°C)	47.5°F (8.6°C)	2.2°F (1.2°C)	13th Warmest	Warmest since: 1988	2021
May–Dec 1999 8-Month	49.3°F (9.6°C)	47.6°F (8.7°C)	1.7°F (0.9°C)	109th Coolest	Coolest since: 1998	1916
May–Dec 1999 8-Month	49.3°F (9.6°C)	47.6°F (8.7°C)	1.7°F (0.9°C)	20th Warmest	Warmest since: 1994	2021
Apr–Dec 1999 9-Month	47.9°F (8.8°C)	46.6°F (8.1°C)	1.3°F (0.7°C)	99th Coolest	Coolest since: 1997	1916
Apr–Dec 1999 9-Month	47.9°F (8.8°C)	46.6°F (8.1°C)	1.3°F (0.7°C)	30th Warmest	Warmest since: 1998	2021
Mar–Dec 1999 10-Month	46.5°F (8.1°C)	44.8°F (7.1°C)	1.7°F (1.0°C)	108th Coolest	Coolest since: 1998	1912
	46.5°F (8.1°C)	44.8°F (7.1°C)	1.7°F (1.0°C)	21st Warmest	Warmest since: 1994	2012
	Ties: 1900, 2004
Feb–Dec 1999 11-Month	44.8°F (7.1°C)	42.7°F (5.9°C)	2.1°F (1.2°C)	116th Coolest	Coolest since: 1998	1912
	44.8°F (7.1°C)	42.7°F (5.9°C)	2.1°F (1.2°C)	13th Warmest	Warmest since: 1988	2012
	Ties: 1954
Jan–Dec 1999 12-Month	43.2°F (6.2°C)	40.8°F (4.9°C)	2.4°F (1.3°C)	121st Coolest	Coolest since: 1998	1895
	43.2°F (6.2°C)	40.8°F (4.9°C)	2.4°F (1.3°C)	8th Warmest	Warmest since: 1981	2012
	Ties: 2001, 2006, 2017
Jul 1998–Dec 1999 18-Month	44.9°F (7.2°C)	42.4°F (5.8°C)	2.5°F (1.4°C)	121st Coolest	Coolest since: 1998	1912
Jul 1998–Dec 1999 18-Month	44.9°F (7.2°C)	42.4°F (5.8°C)	2.5°F (1.4°C)	7th Warmest	Warmest since: 1981	1934
Jan 1998–Dec 1999 24-Month	42.8°F (6.0°C)	40.7°F (4.8°C)	2.1°F (1.2°C)	116th Coolest	Coolest since: 1998	1917
	42.8°F (6.0°C)	40.7°F (4.8°C)	2.1°F (1.2°C)	12th Warmest	Warmest since: 1981	2016
	Ties: 1935, 1981, 2000, 2018
Jan 1997–Dec 1999 36-Month	42.3°F (5.7°C)	40.7°F (4.8°C)	1.6°F (0.9°C)	108th Coolest	Coolest since: 1998	1913, 1917, 1918
	42.3°F (5.7°C)	40.7°F (4.8°C)	1.6°F (0.9°C)	19th Warmest	Warmest since: 1988	2017
	Ties: 2004
Jan 1996–Dec 1999 48-Month	42.0°F (5.6°C)	40.7°F (4.8°C)	1.3°F (0.8°C)	101st Coolest	Coolest since: 1998	1898
	42.0°F (5.6°C)	40.7°F (4.8°C)	1.3°F (0.8°C)	25th Warmest	Warmest since: 1990	2018
	Ties: 2009
Jan 1995–Dec 1999 60-Month	41.9°F (5.5°C)	40.7°F (4.8°C)	1.2°F (0.7°C)	100th Coolest	Coolest since: 1998	1899
	41.9°F (5.5°C)	40.7°F (4.8°C)	1.2°F (0.7°C)	25th Warmest	Warmest since: 1998	2016
	Ties: 1998, 2012

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on January 28, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings