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, September 1987

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 1987 1-Month	56.5°F (13.6°C)	53.8°F (12.1°C)	2.7°F (1.5°C)	100th Coolest	Coolest since: 1986	1965
	56.5°F (13.6°C)	53.8°F (12.1°C)	2.7°F (1.5°C)	29th Warmest	Warmest since: 1981	1998
	Ties: 1981
Aug–Sep 1987 2-Month	58.2°F (14.6°C)	58.9°F (14.9°C)	-0.7°F (-0.3°C)	41st Coolest	Coolest since: 1986	1965
	58.2°F (14.6°C)	58.9°F (14.9°C)	-0.7°F (-0.3°C)	88th Warmest	Warmest since: 1984	2022
	Ties: 1899, 1925, 2004
Jul–Sep 1987 3-Month	60.3°F (15.7°C)	61.2°F (16.2°C)	-0.9°F (-0.5°C)	32nd Coolest	Coolest since: 1986	1912
	60.3°F (15.7°C)	61.2°F (16.2°C)	-0.9°F (-0.5°C)	97th Warmest	Warmest since: 1984	2022
	Ties: 1978
Jun–Sep 1987 4-Month	60.7°F (15.9°C)	60.5°F (15.8°C)	0.2°F (0.1°C)	62nd Coolest	Coolest since: 1986	1993
	60.7°F (15.9°C)	60.5°F (15.8°C)	0.2°F (0.1°C)	67th Warmest	Warmest since: 1983	2021
	Ties: 1917
May–Sep 1987 5-Month	59.5°F (15.3°C)	58.4°F (14.7°C)	1.1°F (0.6°C)	93rd Coolest	Coolest since: 1986	1907
	59.5°F (15.3°C)	58.4°F (14.7°C)	1.1°F (0.6°C)	36th Warmest	Warmest since: 1966	1936
	Ties: 1939, 1949, 1958
Apr–Sep 1987 6-Month	57.6°F (14.2°C)	55.5°F (13.1°C)	2.1°F (1.1°C)	114th Coolest	Coolest since: 1986	1907
	57.6°F (14.2°C)	55.5°F (13.1°C)	2.1°F (1.1°C)	15th Warmest	Warmest since: 1940	1936
	Ties: 1931, 1934, 2015
Mar–Sep 1987 7-Month	54.1°F (12.3°C)	51.8°F (11.0°C)	2.3°F (1.3°C)	115th Coolest	Coolest since: 1986	1965
	54.1°F (12.3°C)	51.8°F (11.0°C)	2.3°F (1.3°C)	14th Warmest	Warmest since: 1940	2012
	Ties: 1934
Feb–Sep 1987 8-Month	51.0°F (10.6°C)	47.9°F (8.8°C)	3.1°F (1.8°C)	121st Coolest	Coolest since: 1986	1899
	51.0°F (10.6°C)	47.9°F (8.8°C)	3.1°F (1.8°C)	8th Warmest	Warmest since: 1934	2012, 2016
	Ties: 1934
Jan–Sep 1987 9-Month	48.1°F (8.9°C)	44.5°F (6.9°C)	3.6°F (2.0°C)	123rd Coolest	Coolest since: 1986	1899
	48.1°F (8.9°C)	44.5°F (6.9°C)	3.6°F (2.0°C)	6th Warmest	Warmest since: 1934	2012
	Ties: 1931
Dec 1986–Sep 1987 10-Month	45.8°F (7.7°C)	42.1°F (5.6°C)	3.7°F (2.1°C)	123rd Coolest	Coolest since: 1986	1950
	45.8°F (7.7°C)	42.1°F (5.6°C)	3.7°F (2.1°C)	5th Warmest	Warmest since: 1931	2012
	Ties: 1931
Nov 1986–Sep 1987 11-Month	44.0°F (6.7°C)	40.9°F (4.9°C)	3.1°F (1.8°C)	115th Coolest	Coolest since: 1986	1899
	44.0°F (6.7°C)	40.9°F (4.9°C)	3.1°F (1.8°C)	13th Warmest	Warmest since: 1981	2012
	Ties: 1998, 2003
Oct 1986–Sep 1987 12-Month	44.1°F (6.7°C)	41.2°F (5.1°C)	2.9°F (1.6°C)	119th Coolest	Coolest since: 1986	1899
Oct 1986–Sep 1987 12-Month	44.1°F (6.7°C)	41.2°F (5.1°C)	2.9°F (1.6°C)	9th Warmest	Warmest since: 1981	2012
Apr 1986–Sep 1987 18-Month	47.8°F (8.8°C)	45.9°F (7.7°C)	1.9°F (1.1°C)	109th Coolest	Coolest since: 1986	1917
	47.8°F (8.8°C)	45.9°F (7.7°C)	1.9°F (1.1°C)	19th Warmest	Warmest since: 1981	2016
	Ties: 1961
Oct 1985–Sep 1987 24-Month	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	99th Coolest	Coolest since: 1986	1917
Oct 1985–Sep 1987 24-Month	42.5°F (5.8°C)	41.1°F (5.1°C)	1.4°F (0.7°C)	28th Warmest	Warmest since: 1981	2016
Oct 1984–Sep 1987 36-Month	41.6°F (5.3°C)	41.1°F (5.1°C)	0.5°F (0.2°C)	81st Coolest	Coolest since: 1986	1951
	41.6°F (5.3°C)	41.1°F (5.1°C)	0.5°F (0.2°C)	45th Warmest	Warmest since: 1983	2017
	Ties: 1926, 1964, 1998, 2019
Oct 1983–Sep 1987 48-Month	41.6°F (5.3°C)	41.1°F (5.1°C)	0.5°F (0.2°C)	79th Coolest	Coolest since: 1986	1952
	41.6°F (5.3°C)	41.1°F (5.1°C)	0.5°F (0.2°C)	46th Warmest	Warmest since: 1984	2007, 2017, 2018
	Ties: 1937, 1977
Oct 1982–Sep 1987 60-Month	41.8°F (5.4°C)	41.0°F (5.0°C)	0.8°F (0.4°C)	84th Coolest	Coolest since: 1986	1952
	41.8°F (5.4°C)	41.0°F (5.0°C)	0.8°F (0.4°C)	40th Warmest	Warmest since: 1984	2016
	Ties: 1944, 2011

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