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 1915

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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 1915 1-Month	49.9°F (9.9°C)	53.8°F (12.1°C)	-3.9°F (-2.2°C)	13th Coolest	Coolest since: 1912	1965
	49.9°F (9.9°C)	53.8°F (12.1°C)	-3.9°F (-2.2°C)	116th Warmest	Warmest since: 1914	1998
	Ties: 1921
Aug–Sep 1915 2-Month	57.7°F (14.3°C)	59.0°F (15.0°C)	-1.3°F (-0.7°C)	32nd Coolest	Coolest since: 1912	1965
	57.7°F (14.3°C)	59.0°F (15.0°C)	-1.3°F (-0.7°C)	97th Warmest	Warmest since: 1914	2022
	Ties: 1959
Jul–Sep 1915 3-Month	58.2°F (14.6°C)	61.2°F (16.2°C)	-3.0°F (-1.6°C)	6th Coolest	Coolest since: 1912	1912
	58.2°F (14.6°C)	61.2°F (16.2°C)	-3.0°F (-1.6°C)	123rd Warmest	Warmest since: 1914	2022
	Ties: 1992
Jun–Sep 1915 4-Month	57.0°F (13.9°C)	60.5°F (15.8°C)	-3.5°F (-1.9°C)	3rd Coolest	Coolest since: 1912	1993
Jun–Sep 1915 4-Month	57.0°F (13.9°C)	60.5°F (15.8°C)	-3.5°F (-1.9°C)	126th Warmest	Warmest since: 1914	2021
May–Sep 1915 5-Month	55.4°F (13.0°C)	58.4°F (14.7°C)	-3.0°F (-1.7°C)	4th Coolest	Coolest since: 1912	1907
May–Sep 1915 5-Month	55.4°F (13.0°C)	58.4°F (14.7°C)	-3.0°F (-1.7°C)	125th Warmest	Warmest since: 1914	1936
Apr–Sep 1915 6-Month	54.3°F (12.4°C)	55.5°F (13.1°C)	-1.2°F (-0.7°C)	22nd Coolest	Coolest since: 1912	1907
	54.3°F (12.4°C)	55.5°F (13.1°C)	-1.2°F (-0.7°C)	107th Warmest	Warmest since: 1914	1936
	Ties: 1928
Mar–Sep 1915 7-Month	50.6°F (10.3°C)	51.7°F (10.9°C)	-1.1°F (-0.6°C)	27th Coolest	Coolest since: 1912	1965
	50.6°F (10.3°C)	51.7°F (10.9°C)	-1.1°F (-0.6°C)	102nd Warmest	Warmest since: 1914	2012
	Ties: 1935, 1993
Feb–Sep 1915 8-Month	47.3°F (8.5°C)	47.9°F (8.8°C)	-0.6°F (-0.3°C)	42nd Coolest	Coolest since: 1913	1899
	47.3°F (8.5°C)	47.9°F (8.8°C)	-0.6°F (-0.3°C)	87th Warmest	Warmest since: 1914	2012, 2016
	Ties: 1924, 1956, 1979
Jan–Sep 1915 9-Month	43.9°F (6.6°C)	44.5°F (6.9°C)	-0.6°F (-0.3°C)	43rd Coolest	Coolest since: 1913	1899
	43.9°F (6.6°C)	44.5°F (6.9°C)	-0.6°F (-0.3°C)	86th Warmest	Warmest since: 1914	2012
	Ties: 1905
Dec 1914–Sep 1915 10-Month	40.8°F (4.9°C)	42.1°F (5.6°C)	-1.3°F (-0.7°C)	26th Coolest	Coolest since: 1913	1950
	40.8°F (4.9°C)	42.1°F (5.6°C)	-1.3°F (-0.7°C)	102nd Warmest	Warmest since: 1914	2012
	Ties: 1909, 1913, 1943
Nov 1914–Sep 1915 11-Month	40.3°F (4.6°C)	41.0°F (5.0°C)	-0.7°F (-0.4°C)	39th Coolest	Coolest since: 1913	1899
	40.3°F (4.6°C)	41.0°F (5.0°C)	-0.7°F (-0.4°C)	89th Warmest	Warmest since: 1914	2012
	Ties: 1936, 2019
Oct 1914–Sep 1915 12-Month	40.6°F (4.8°C)	41.2°F (5.1°C)	-0.6°F (-0.3°C)	43rd Coolest	Coolest since: 1913	1899
Oct 1914–Sep 1915 12-Month	40.6°F (4.8°C)	41.2°F (5.1°C)	-0.6°F (-0.3°C)	85th Warmest	Warmest since: 1914	2012
Apr 1914–Sep 1915 18-Month	45.6°F (7.6°C)	45.9°F (7.7°C)	-0.3°F (-0.1°C)	44th Coolest	Coolest since: 1913	1917
	45.6°F (7.6°C)	45.9°F (7.7°C)	-0.3°F (-0.1°C)	84th Warmest	Warmest since: 1914	2016
	Ties: 1910, 1957, 1973
Oct 1913–Sep 1915 24-Month	41.2°F (5.1°C)	41.1°F (5.1°C)	0.1°F (0.0°C)	60th Coolest	Coolest since: 1914	1917
	41.2°F (5.1°C)	41.1°F (5.1°C)	0.1°F (0.0°C)	67th Warmest	Warmest since: 1909	2016
	Ties: 1902, 1909, 1925, 1983
Oct 1912–Sep 1915 36-Month	40.8°F (4.9°C)	41.1°F (5.1°C)	-0.3°F (-0.2°C)	41st Coolest	Coolest since: 1914	1951
	40.8°F (4.9°C)	41.1°F (5.1°C)	-0.3°F (-0.2°C)	85th Warmest	Warmest since: 1910	2017
	Ties: 1920, 1938, 1974, 1986
Oct 1911–Sep 1915 48-Month	40.1°F (4.5°C)	41.1°F (5.1°C)	-1.0°F (-0.6°C)	13th Coolest	Coolest since: 1914	1952
	40.1°F (4.5°C)	41.1°F (5.1°C)	-1.0°F (-0.6°C)	112th Warmest	Warmest since: 1911	2007, 2017, 2018
	Ties: 1919, 1930
Oct 1910–Sep 1915 60-Month	40.1°F (4.5°C)	41.1°F (5.1°C)	-1.0°F (-0.6°C)	10th Coolest	Coolest since: 1913	1952
	40.1°F (4.5°C)	41.1°F (5.1°C)	-1.0°F (-0.6°C)	114th Warmest	Warmest since: 1914	2016
	Ties: 1907

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings