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 1939

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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 1939 1-Month	55.9°F (13.3°C)	53.8°F (12.1°C)	2.1°F (1.2°C)	93rd Coolest	Coolest since: 1936	1965
September 1939 1-Month	55.9°F (13.3°C)	53.8°F (12.1°C)	2.1°F (1.2°C)	36th Warmest	Warmest since: 1938	1998
Aug–Sep 1939 2-Month	60.3°F (15.7°C)	59.0°F (15.0°C)	1.3°F (0.7°C)	86th Coolest	Coolest since: 1935	1965
	60.3°F (15.7°C)	59.0°F (15.0°C)	1.3°F (0.7°C)	43rd Warmest	Warmest since: 1938	2022
	Ties: 1949
Jul–Sep 1939 3-Month	62.9°F (17.2°C)	61.2°F (16.2°C)	1.7°F (1.0°C)	101st Coolest	Coolest since: 1935	1912
	62.9°F (17.2°C)	61.2°F (16.2°C)	1.7°F (1.0°C)	28th Warmest	Warmest since: 1938	2022
	Ties: 1922, 2009
Jun–Sep 1939 4-Month	60.8°F (16.0°C)	60.5°F (15.8°C)	0.3°F (0.2°C)	68th Coolest	Coolest since: 1934	1993
	60.8°F (16.0°C)	60.5°F (15.8°C)	0.3°F (0.2°C)	61st Warmest	Warmest since: 1938	2021
	Ties: 1897, 1900, 1917, 1957, 1969
May–Sep 1939 5-Month	59.5°F (15.3°C)	58.4°F (14.7°C)	1.1°F (0.6°C)	93rd Coolest	Coolest since: 1935	1907
	59.5°F (15.3°C)	58.4°F (14.7°C)	1.1°F (0.6°C)	36th Warmest	Warmest since: 1938	1936
	Ties: 1949, 1958, 1987
Apr–Sep 1939 6-Month	56.9°F (13.8°C)	55.5°F (13.1°C)	1.4°F (0.7°C)	102nd Coolest	Coolest since: 1938	1907
	56.9°F (13.8°C)	55.5°F (13.1°C)	1.4°F (0.7°C)	27th Warmest	Warmest since: 1937	1936
	Ties: 2013
Mar–Sep 1939 7-Month	53.1°F (11.7°C)	51.7°F (10.9°C)	1.4°F (0.8°C)	100th Coolest	Coolest since: 1937	1965
	53.1°F (11.7°C)	51.7°F (10.9°C)	1.4°F (0.8°C)	29th Warmest	Warmest since: 1938	2012
	Ties: 1937, 1986, 1992, 2013
Feb–Sep 1939 8-Month	48.1°F (8.9°C)	47.9°F (8.8°C)	0.2°F (0.1°C)	75th Coolest	Coolest since: 1936	1899
	48.1°F (8.9°C)	47.9°F (8.8°C)	0.2°F (0.1°C)	54th Warmest	Warmest since: 1938	2012, 2016
	Ties: 1933, 1953, 1971, 1995, 2008, 2010
Jan–Sep 1939 9-Month	45.6°F (7.6°C)	44.5°F (6.9°C)	1.1°F (0.7°C)	85th Coolest	Coolest since: 1938	1899
	45.6°F (7.6°C)	44.5°F (6.9°C)	1.1°F (0.7°C)	44th Warmest	Warmest since: 1938	2012
	Ties: 1938, 1973, 2009
Dec 1938–Sep 1939 10-Month	43.5°F (6.4°C)	42.1°F (5.6°C)	1.4°F (0.8°C)	88th Coolest	Coolest since: 1938	1950
	43.5°F (6.4°C)	42.1°F (5.6°C)	1.4°F (0.8°C)	40th Warmest	Warmest since: 1934	2012
	Ties: 2004
Nov 1938–Sep 1939 11-Month	41.9°F (5.5°C)	41.0°F (5.0°C)	0.9°F (0.5°C)	88th Coolest	Coolest since: 1938	1899
	41.9°F (5.5°C)	41.0°F (5.0°C)	0.9°F (0.5°C)	40th Warmest	Warmest since: 1934	2012
	Ties: 1908
Oct 1938–Sep 1939 12-Month	42.3°F (5.7°C)	41.2°F (5.1°C)	1.1°F (0.6°C)	89th Coolest	Coolest since: 1938	1899
	42.3°F (5.7°C)	41.2°F (5.1°C)	1.1°F (0.6°C)	39th Warmest	Warmest since: 1934	2012
	Ties: 1908
Apr 1938–Sep 1939 18-Month	47.1°F (8.4°C)	45.9°F (7.7°C)	1.2°F (0.7°C)	96th Coolest	Coolest since: 1937	1917
	47.1°F (8.4°C)	45.9°F (7.7°C)	1.2°F (0.7°C)	32nd Warmest	Warmest since: 1938	2016
	Ties: 1919, 1958, 1977, 1989, 1995
Oct 1937–Sep 1939 24-Month	42.2°F (5.7°C)	41.1°F (5.1°C)	1.1°F (0.6°C)	93rd Coolest	Coolest since: 1938	1917
	42.2°F (5.7°C)	41.1°F (5.1°C)	1.1°F (0.6°C)	34th Warmest	Warmest since: 1935	2016
	Ties: 1961, 1998
Oct 1936–Sep 1939 36-Month	41.5°F (5.3°C)	41.1°F (5.1°C)	0.4°F (0.2°C)	75th Coolest	Coolest since: 1938	1951
	41.5°F (5.3°C)	41.1°F (5.1°C)	0.4°F (0.2°C)	51st Warmest	Warmest since: 1936	2017
	Ties: 1968, 1978, 2010
Oct 1935–Sep 1939 48-Month	41.2°F (5.1°C)	41.1°F (5.1°C)	0.1°F (0.0°C)	66th Coolest	Coolest since: 1938	1952
	41.2°F (5.1°C)	41.1°F (5.1°C)	0.1°F (0.0°C)	59th Warmest	Warmest since: 1937	2007, 2017, 2018
	Ties: 1921, 1948, 1955, 1956, 1960, 1962
Oct 1934–Sep 1939 60-Month	41.3°F (5.2°C)	41.1°F (5.1°C)	0.2°F (0.1°C)	66th Coolest	Coolest since: 1933	1952
	41.3°F (5.2°C)	41.1°F (5.1°C)	0.2°F (0.1°C)	58th Warmest	Warmest since: 1938	2016
	Ties: 1933, 1946, 1981

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings