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 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
September 1989 1-Month	54.3°F (12.4°C)	53.8°F (12.1°C)	0.5°F (0.3°C)	64th Coolest	Coolest since: 1988	1965
	54.3°F (12.4°C)	53.8°F (12.1°C)	0.5°F (0.3°C)	65th Warmest	Warmest since: 1987	1998
	Ties: 1904
Aug–Sep 1989 2-Month	58.7°F (14.8°C)	59.0°F (15.0°C)	-0.3°F (-0.2°C)	51st Coolest	Coolest since: 1987	1965
	58.7°F (14.8°C)	59.0°F (15.0°C)	-0.3°F (-0.2°C)	78th Warmest	Warmest since: 1988	2022
	Ties: 1929, 1978
Jul–Sep 1989 3-Month	62.1°F (16.7°C)	61.2°F (16.2°C)	0.9°F (0.5°C)	81st Coolest	Coolest since: 1987	1912
	62.1°F (16.7°C)	61.2°F (16.2°C)	0.9°F (0.5°C)	48th Warmest	Warmest since: 1988	2022
	Ties: 1947
Jun–Sep 1989 4-Month	61.3°F (16.3°C)	60.5°F (15.8°C)	0.8°F (0.5°C)	90th Coolest	Coolest since: 1987	1993
	61.3°F (16.3°C)	60.5°F (15.8°C)	0.8°F (0.5°C)	39th Warmest	Warmest since: 1988	2021
	Ties: 1932, 1935, 2009
May–Sep 1989 5-Month	59.0°F (15.0°C)	58.4°F (14.7°C)	0.6°F (0.3°C)	81st Coolest	Coolest since: 1986	1907
	59.0°F (15.0°C)	58.4°F (14.7°C)	0.6°F (0.3°C)	48th Warmest	Warmest since: 1988	1936
	Ties: 1923, 1941, 1948, 1952, 1956, 1969, 2011, 2014
Apr–Sep 1989 6-Month	56.0°F (13.3°C)	55.5°F (13.1°C)	0.5°F (0.2°C)	80th Coolest	Coolest since: 1986	1907
	56.0°F (13.3°C)	55.5°F (13.1°C)	0.5°F (0.2°C)	49th Warmest	Warmest since: 1988	1936
	Ties: 1948, 1960, 1966, 2014
Mar–Sep 1989 7-Month	51.8°F (11.0°C)	51.7°F (10.9°C)	0.1°F (0.1°C)	59th Coolest	Coolest since: 1982	1965
	51.8°F (11.0°C)	51.7°F (10.9°C)	0.1°F (0.1°C)	70th Warmest	Warmest since: 1988	2012
	Ties: 1999
Feb–Sep 1989 8-Month	46.5°F (8.1°C)	47.9°F (8.8°C)	-1.4°F (-0.7°C)	22nd Coolest	Coolest since: 1982	1899
Feb–Sep 1989 8-Month	46.5°F (8.1°C)	47.9°F (8.8°C)	-1.4°F (-0.7°C)	107th Warmest	Warmest since: 1988	2012, 2016
Jan–Sep 1989 9-Month	43.7°F (6.5°C)	44.5°F (6.9°C)	-0.8°F (-0.4°C)	39th Coolest	Coolest since: 1982	1899
	43.7°F (6.5°C)	44.5°F (6.9°C)	-0.8°F (-0.4°C)	90th Warmest	Warmest since: 1988	2012
	Ties: 1897, 1956
Dec 1988–Sep 1989 10-Month	41.7°F (5.4°C)	42.1°F (5.6°C)	-0.4°F (-0.2°C)	45th Coolest	Coolest since: 1985	1950
	41.7°F (5.4°C)	42.1°F (5.6°C)	-0.4°F (-0.2°C)	83rd Warmest	Warmest since: 1988	2012
	Ties: 1898, 1945, 1971
Nov 1988–Sep 1989 11-Month	40.6°F (4.8°C)	41.0°F (5.0°C)	-0.4°F (-0.2°C)	49th Coolest	Coolest since: 1985	1899
Nov 1988–Sep 1989 11-Month	40.6°F (4.8°C)	41.0°F (5.0°C)	-0.4°F (-0.2°C)	79th Warmest	Warmest since: 1988	2012
Oct 1988–Sep 1989 12-Month	41.2°F (5.1°C)	41.2°F (5.1°C)	0.0°F (0.0°C)	61st Coolest	Coolest since: 1986	1899
	41.2°F (5.1°C)	41.2°F (5.1°C)	0.0°F (0.0°C)	67th Warmest	Warmest since: 1988	2012
	Ties: 1942, 1973
Apr 1988–Sep 1989 18-Month	47.1°F (8.4°C)	45.9°F (7.7°C)	1.2°F (0.7°C)	96th Coolest	Coolest since: 1986	1917
	47.1°F (8.4°C)	45.9°F (7.7°C)	1.2°F (0.7°C)	32nd Warmest	Warmest since: 1988	2016
	Ties: 1919, 1939, 1958, 1977, 1995
Oct 1987–Sep 1989 24-Month	42.7°F (5.9°C)	41.1°F (5.1°C)	1.6°F (0.8°C)	104th Coolest	Coolest since: 1987	1917
	42.7°F (5.9°C)	41.1°F (5.1°C)	1.6°F (0.8°C)	23rd Warmest	Warmest since: 1988	2016
	Ties: 1934
Oct 1986–Sep 1989 36-Month	43.2°F (6.2°C)	41.1°F (5.1°C)	2.1°F (1.1°C)	116th Coolest	Coolest since: 1988	1951
	43.2°F (6.2°C)	41.1°F (5.1°C)	2.1°F (1.1°C)	10th Warmest	Warmest to Date	2017
	Ties: 2018
Oct 1985–Sep 1989 48-Month	42.6°F (5.9°C)	41.1°F (5.1°C)	1.5°F (0.8°C)	108th Coolest	Coolest since: 1988	1952
	42.6°F (5.9°C)	41.1°F (5.1°C)	1.5°F (0.8°C)	17th Warmest	Warmest since: 1941	2007, 2017, 2018
	Ties: 1941, 2022
Oct 1984–Sep 1989 60-Month	42.1°F (5.6°C)	41.1°F (5.1°C)	1.0°F (0.5°C)	94th Coolest	Coolest since: 1987	1952
	42.1°F (5.6°C)	41.1°F (5.1°C)	1.0°F (0.5°C)	30th Warmest	Warmest since: 1988	2016
	Ties: 1941, 1984, 2012

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published June 2023, retrieved on June 10, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings