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 1989

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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 1989 1-Month	49.9°F (9.9°C)	50.2°F (10.1°C)	-0.3°F (-0.2°C)	66th Coolest	Coolest since: 1984	1907, 1927
May 1989 1-Month	49.9°F (9.9°C)	50.2°F (10.1°C)	-0.3°F (-0.2°C)	63rd Warmest	Warmest since: 1988	1934
Apr–May 1989 2-Month	45.5°F (7.5°C)	45.5°F (7.5°C)	0.0°F (0.0°C)	66th Coolest	Coolest since: 1984	1975
	45.5°F (7.5°C)	45.5°F (7.5°C)	0.0°F (0.0°C)	63rd Warmest	Warmest since: 1988	1934
	Ties: 1912
Mar–May 1989 3-Month	39.2°F (4.0°C)	40.1°F (4.5°C)	-0.9°F (-0.5°C)	43rd Coolest	Coolest since: 1982	1899
	39.2°F (4.0°C)	40.1°F (4.5°C)	-0.9°F (-0.5°C)	86th Warmest	Warmest since: 1988	1910
	Ties: 1929
Feb–May 1989 4-Month	31.8°F (-0.1°C)	35.4°F (1.9°C)	-3.6°F (-2.0°C)	11th Coolest	Coolest since: 1975	1899
	31.8°F (-0.1°C)	35.4°F (1.9°C)	-3.6°F (-2.0°C)	118th Warmest	Warmest since: 1988	1992
	Ties: 1951
Jan–May 1989 5-Month	29.7°F (-1.3°C)	31.7°F (-0.2°C)	-2.0°F (-1.1°C)	29th Coolest	Coolest since: 1982	1899
	29.7°F (-1.3°C)	31.7°F (-0.2°C)	-2.0°F (-1.1°C)	100th Warmest	Warmest since: 1988	1992
	Ties: 1920
Dec 1988–May 1989 6-Month	28.6°F (-1.9°C)	29.9°F (-1.2°C)	-1.3°F (-0.7°C)	39th Coolest	Coolest since: 1982	1917
Dec 1988–May 1989 6-Month	28.6°F (-1.9°C)	29.9°F (-1.2°C)	-1.3°F (-0.7°C)	89th Warmest	Warmest since: 1988	1992
Nov 1988–May 1989 7-Month	28.9°F (-1.7°C)	29.8°F (-1.2°C)	-0.9°F (-0.5°C)	43rd Coolest	Coolest since: 1982	1899
	28.9°F (-1.7°C)	29.8°F (-1.2°C)	-0.9°F (-0.5°C)	85th Warmest	Warmest since: 1988	1992
	Ties: 1932, 1971, 1993
Oct 1988–May 1989 8-Month	31.1°F (-0.5°C)	31.5°F (-0.3°C)	-0.4°F (-0.2°C)	52nd Coolest	Coolest since: 1985	1899
	31.1°F (-0.5°C)	31.5°F (-0.3°C)	-0.4°F (-0.2°C)	76th Warmest	Warmest since: 1988	1934, 2000
	Ties: 1930
Sep 1988–May 1989 9-Month	33.6°F (0.9°C)	34.0°F (1.1°C)	-0.4°F (-0.2°C)	53rd Coolest	Coolest since: 1986	1899
	33.6°F (0.9°C)	34.0°F (1.1°C)	-0.4°F (-0.2°C)	75th Warmest	Warmest since: 1988	2016
	Ties: 1918
Aug 1988–May 1989 10-Month	36.8°F (2.7°C)	37.0°F (2.8°C)	-0.2°F (-0.1°C)	53rd Coolest	Coolest since: 1986	1917
	36.8°F (2.7°C)	37.0°F (2.8°C)	-0.2°F (-0.1°C)	75th Warmest	Warmest since: 1988	1992, 2016
	Ties: 1932, 1959
Jul 1988–May 1989 11-Month	39.6°F (4.2°C)	39.6°F (4.2°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1986	1917
	39.6°F (4.2°C)	39.6°F (4.2°C)	0.0°F (0.0°C)	71st Warmest	Warmest since: 1988	1992, 2016
	Ties: 1945
Jun 1988–May 1989 12-Month	42.0°F (5.6°C)	41.1°F (5.1°C)	0.9°F (0.5°C)	80th Coolest	Coolest since: 1986	1917
	42.0°F (5.6°C)	41.1°F (5.1°C)	0.9°F (0.5°C)	48th Warmest	Warmest since: 1988	2016
	Ties: 2020
Dec 1987–May 1989 18-Month	39.0°F (3.9°C)	37.4°F (3.0°C)	1.6°F (0.9°C)	100th Coolest	Coolest since: 1986	1917
	39.0°F (3.9°C)	37.4°F (3.0°C)	1.6°F (0.9°C)	27th Warmest	Warmest since: 1988	2016
	Ties: 1984, 2012, 2015
Jun 1987–May 1989 24-Month	42.6°F (5.9°C)	41.1°F (5.1°C)	1.5°F (0.8°C)	105th Coolest	Coolest since: 1987	1917
	42.6°F (5.9°C)	41.1°F (5.1°C)	1.5°F (0.8°C)	22nd Warmest	Warmest since: 1988	2016
	Ties: 1942, 1964, 1993, 2003
Jun 1986–May 1989 36-Month	43.1°F (6.2°C)	41.1°F (5.1°C)	2.0°F (1.1°C)	115th Coolest	Coolest since: 1988	1918
	43.1°F (6.2°C)	41.1°F (5.1°C)	2.0°F (1.1°C)	11th Warmest	Warmest to Date	2017
	Ties: 2005
Jun 1985–May 1989 48-Month	42.4°F (5.8°C)	41.1°F (5.1°C)	1.3°F (0.7°C)	102nd Coolest	Coolest since: 1988	1899, 1952
	42.4°F (5.8°C)	41.1°F (5.1°C)	1.3°F (0.7°C)	23rd Warmest	Warmest since: 1942	2016
	Ties: 2010, 2014
Jun 1984–May 1989 60-Month	42.0°F (5.6°C)	41.1°F (5.1°C)	0.9°F (0.5°C)	89th Coolest	Coolest since: 1988	1952
	42.0°F (5.6°C)	41.1°F (5.1°C)	0.9°F (0.5°C)	35th Warmest	Warmest since: 1988	2016
	Ties: 1944, 1964, 1988, 2021

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 25, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings