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 1920

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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 1920 1-Month	55.0°F (12.8°C)	53.8°F (12.1°C)	1.2°F (0.7°C)	80th Coolest	Coolest since: 1918	1965
	55.0°F (12.8°C)	53.8°F (12.1°C)	1.2°F (0.7°C)	49th Warmest	Warmest since: 1919	1998
	Ties: 2007, 2019
Aug–Sep 1920 2-Month	60.1°F (15.6°C)	59.0°F (15.0°C)	1.1°F (0.6°C)	83rd Coolest	Coolest since: 1918	1965
Aug–Sep 1920 2-Month	60.1°F (15.6°C)	59.0°F (15.0°C)	1.1°F (0.6°C)	46th Warmest	Warmest since: 1919	2022
Jul–Sep 1920 3-Month	62.5°F (16.9°C)	61.2°F (16.2°C)	1.3°F (0.7°C)	94th Coolest	Coolest since: 1918	1912
	62.5°F (16.9°C)	61.2°F (16.2°C)	1.3°F (0.7°C)	35th Warmest	Warmest since: 1919	2022
	Ties: 1933, 1953, 1969, 2014
Jun–Sep 1920 4-Month	61.1°F (16.2°C)	60.5°F (15.8°C)	0.6°F (0.4°C)	83rd Coolest	Coolest since: 1918	1993
	61.1°F (16.2°C)	60.5°F (15.8°C)	0.6°F (0.4°C)	46th Warmest	Warmest since: 1919	2021
	Ties: 1953
May–Sep 1920 5-Month	58.6°F (14.8°C)	58.4°F (14.7°C)	0.2°F (0.1°C)	62nd Coolest	Coolest since: 1918	1907
	58.6°F (14.8°C)	58.4°F (14.7°C)	0.2°F (0.1°C)	67th Warmest	Warmest since: 1919	1936
	Ties: 1914, 1971, 1980, 1983
Apr–Sep 1920 6-Month	54.4°F (12.4°C)	55.5°F (13.1°C)	-1.1°F (-0.7°C)	24th Coolest	Coolest since: 1917	1907
	54.4°F (12.4°C)	55.5°F (13.1°C)	-1.1°F (-0.7°C)	105th Warmest	Warmest since: 1919	1936
	Ties: 1917, 1953
Mar–Sep 1920 7-Month	50.4°F (10.2°C)	51.7°F (10.9°C)	-1.3°F (-0.7°C)	20th Coolest	Coolest since: 1917	1965
	50.4°F (10.2°C)	51.7°F (10.9°C)	-1.3°F (-0.7°C)	109th Warmest	Warmest since: 1919	2012
	Ties: 1895, 1945, 1964
Feb–Sep 1920 8-Month	46.9°F (8.3°C)	47.9°F (8.8°C)	-1.0°F (-0.5°C)	26th Coolest	Coolest since: 1917	1899
	46.9°F (8.3°C)	47.9°F (8.8°C)	-1.0°F (-0.5°C)	103rd Warmest	Warmest since: 1919	2012, 2016
	Ties: 1909, 1944, 1945, 1962
Jan–Sep 1920 9-Month	43.6°F (6.4°C)	44.5°F (6.9°C)	-0.9°F (-0.5°C)	37th Coolest	Coolest since: 1917	1899
	43.6°F (6.4°C)	44.5°F (6.9°C)	-0.9°F (-0.5°C)	92nd Warmest	Warmest since: 1919	2012
	Ties: 1954
Dec 1919–Sep 1920 10-Month	40.7°F (4.8°C)	42.1°F (5.6°C)	-1.4°F (-0.8°C)	23rd Coolest	Coolest since: 1917	1950
	40.7°F (4.8°C)	42.1°F (5.6°C)	-1.4°F (-0.8°C)	105th Warmest	Warmest since: 1919	2012
	Ties: 1928, 1962
Nov 1919–Sep 1920 11-Month	38.9°F (3.8°C)	41.0°F (5.0°C)	-2.1°F (-1.2°C)	13th Coolest	Coolest since: 1917	1899
	38.9°F (3.8°C)	41.0°F (5.0°C)	-2.1°F (-1.2°C)	115th Warmest	Warmest since: 1919	2012
	Ties: 1929, 1949
Oct 1919–Sep 1920 12-Month	38.4°F (3.6°C)	41.2°F (5.1°C)	-2.8°F (-1.5°C)	8th Coolest	Coolest since: 1917	1899
Oct 1919–Sep 1920 12-Month	38.4°F (3.6°C)	41.2°F (5.1°C)	-2.8°F (-1.5°C)	120th Warmest	Warmest since: 1919	2012
Apr 1919–Sep 1920 18-Month	45.0°F (7.2°C)	45.9°F (7.7°C)	-0.9°F (-0.5°C)	22nd Coolest	Coolest since: 1917	1917
	45.0°F (7.2°C)	45.9°F (7.7°C)	-0.9°F (-0.5°C)	106th Warmest	Warmest since: 1919	2016
	Ties: 1922, 1927, 1943, 1985
Oct 1918–Sep 1920 24-Month	40.8°F (4.9°C)	41.1°F (5.1°C)	-0.3°F (-0.2°C)	43rd Coolest	Coolest since: 1918	1917
	40.8°F (4.9°C)	41.1°F (5.1°C)	-0.3°F (-0.2°C)	84th Warmest	Warmest since: 1919	2016
	Ties: 1911, 1948, 1975, 2011
Oct 1917–Sep 1920 36-Month	40.8°F (4.9°C)	41.1°F (5.1°C)	-0.3°F (-0.2°C)	41st Coolest	Coolest since: 1919	1951
	40.8°F (4.9°C)	41.1°F (5.1°C)	-0.3°F (-0.2°C)	85th Warmest	Warmest since: 1915	2017
	Ties: 1915, 1938, 1974, 1986
Oct 1916–Sep 1920 48-Month	39.9°F (4.4°C)	41.1°F (5.1°C)	-1.2°F (-0.7°C)	8th Coolest	Coolest since: 1918	1952
	39.9°F (4.4°C)	41.1°F (5.1°C)	-1.2°F (-0.7°C)	117th Warmest	Warmest since: 1919	2007, 2017, 2018
	Ties: 1900, 1912, 1913
Oct 1915–Sep 1920 60-Month	39.8°F (4.3°C)	41.1°F (5.1°C)	-1.3°F (-0.8°C)	4th Coolest	Coolest since: 1917	1952
	39.8°F (4.3°C)	41.1°F (5.1°C)	-1.3°F (-0.8°C)	120th Warmest	Warmest since: 1919	2016
	Ties: 1917

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 6, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings