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.

Montana

Average Temperature Rankings, May 1990

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Record Coolest
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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1990 1-Month	48.8°F (9.3°C)	50.2°F (10.1°C)	-1.4°F (-0.8°C)	43rd Coolest	Coolest since: 1983	1907, 1927
	48.8°F (9.3°C)	50.2°F (10.1°C)	-1.4°F (-0.8°C)	86th Warmest	Warmest since: 1989	1934
	Ties: 1913, 1915, 1938
Apr–May 1990 2-Month	45.6°F (7.6°C)	45.5°F (7.5°C)	0.1°F (0.1°C)	68th Coolest	Coolest since: 1989	1975
	45.6°F (7.6°C)	45.5°F (7.5°C)	0.1°F (0.1°C)	61st Warmest	Warmest since: 1988	1934
	Ties: 1942
Mar–May 1990 3-Month	41.5°F (5.3°C)	40.1°F (4.5°C)	1.4°F (0.8°C)	90th Coolest	Coolest since: 1989	1899
	41.5°F (5.3°C)	40.1°F (4.5°C)	1.4°F (0.8°C)	39th Warmest	Warmest since: 1988	1910
	Ties: 1931
Feb–May 1990 4-Month	37.1°F (2.8°C)	35.4°F (1.9°C)	1.7°F (0.9°C)	95th Coolest	Coolest since: 1989	1899
	37.1°F (2.8°C)	35.4°F (1.9°C)	1.7°F (0.9°C)	34th Warmest	Warmest since: 1988	1992
	Ties: 1900
Jan–May 1990 5-Month	34.8°F (1.6°C)	31.7°F (-0.2°C)	3.1°F (1.8°C)	109th Coolest	Coolest since: 1989	1899
	34.8°F (1.6°C)	31.7°F (-0.2°C)	3.1°F (1.8°C)	20th Warmest	Warmest since: 1988	1992
	Ties: 1900, 1925, 1941, 1988
Dec 1989–May 1990 6-Month	32.4°F (0.2°C)	29.9°F (-1.2°C)	2.5°F (1.4°C)	100th Coolest	Coolest since: 1989	1917
	32.4°F (0.2°C)	29.9°F (-1.2°C)	2.5°F (1.4°C)	28th Warmest	Warmest since: 1988	1992
	Ties: 1900, 1994, 2021
Nov 1989–May 1990 7-Month	32.4°F (0.2°C)	29.8°F (-1.2°C)	2.6°F (1.4°C)	107th Coolest	Coolest since: 1989	1899
	32.4°F (0.2°C)	29.8°F (-1.2°C)	2.6°F (1.4°C)	21st Warmest	Warmest since: 1988	1992
	Ties: 2021
Oct 1989–May 1990 8-Month	33.8°F (1.0°C)	31.5°F (-0.3°C)	2.3°F (1.3°C)	107th Coolest	Coolest since: 1989	1899
Oct 1989–May 1990 8-Month	33.8°F (1.0°C)	31.5°F (-0.3°C)	2.3°F (1.3°C)	21st Warmest	Warmest since: 1988	1934, 2000
Sep 1989–May 1990 9-Month	36.1°F (2.3°C)	34.0°F (1.1°C)	2.1°F (1.2°C)	106th Coolest	Coolest since: 1989	1899
	36.1°F (2.3°C)	34.0°F (1.1°C)	2.1°F (1.2°C)	22nd Warmest	Warmest since: 1988	2016
	Ties: 1939
Aug 1989–May 1990 10-Month	38.8°F (3.8°C)	37.0°F (2.8°C)	1.8°F (1.0°C)	102nd Coolest	Coolest since: 1989	1917
	38.8°F (3.8°C)	37.0°F (2.8°C)	1.8°F (1.0°C)	26th Warmest	Warmest since: 1988	1992, 2016
	Ties: 1900, 2013, 2017
Jul 1989–May 1990 11-Month	41.5°F (5.3°C)	39.6°F (4.2°C)	1.9°F (1.1°C)	106th Coolest	Coolest since: 1989	1917
	41.5°F (5.3°C)	39.6°F (4.2°C)	1.9°F (1.1°C)	22nd Warmest	Warmest since: 1988	1992, 2016
	Ties: 1964, 2021
Jun 1989–May 1990 12-Month	42.9°F (6.1°C)	41.1°F (5.1°C)	1.8°F (1.0°C)	104th Coolest	Coolest since: 1989	1917
	42.9°F (6.1°C)	41.1°F (5.1°C)	1.8°F (1.0°C)	24th Warmest	Warmest since: 1988	2016
	Ties: 1939, 1964
Dec 1988–May 1990 18-Month	38.2°F (3.4°C)	37.4°F (3.0°C)	0.8°F (0.4°C)	80th Coolest	Coolest since: 1986	1917
	38.2°F (3.4°C)	37.4°F (3.0°C)	0.8°F (0.4°C)	47th Warmest	Warmest since: 1989	2016
	Ties: 1915, 1927, 1958, 2018
Jun 1988–May 1990 24-Month	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	100th Coolest	Coolest since: 1987	1917
	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	27th Warmest	Warmest since: 1989	2016
	Ties: 1932, 1939, 2014, 2021
Jun 1987–May 1990 36-Month	42.7°F (5.9°C)	41.1°F (5.1°C)	1.6°F (0.8°C)	108th Coolest	Coolest since: 1988	1918
	42.7°F (5.9°C)	41.1°F (5.1°C)	1.6°F (0.8°C)	18th Warmest	Warmest since: 1989	2017
	Ties: 2002
Jun 1986–May 1990 48-Month	43.0°F (6.1°C)	41.1°F (5.1°C)	1.9°F (1.0°C)	115th Coolest	Coolest since: 1989	1899, 1952
	43.0°F (6.1°C)	41.1°F (5.1°C)	1.9°F (1.0°C)	10th Warmest	Warmest to Date	2016
	Ties: 2000, 2002, 2009
Jun 1985–May 1990 60-Month	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	106th Coolest	Coolest since: 1989	1952
	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	18th Warmest	Warmest since: 1942	2016
	Ties: 1935, 1942, 1993, 2020

Citing This Page

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