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 1998

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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 1998 1-Month	61.4°F (16.3°C)	53.8°F (12.1°C)	7.6°F (4.2°C)	128th Coolest	Coolest since: 1997	1965
September 1998 1-Month	61.4°F (16.3°C)	53.8°F (12.1°C)	7.6°F (4.2°C)	1st Warmest	Warmest to Date	1998
Aug–Sep 1998 2-Month	64.8°F (18.2°C)	59.0°F (15.0°C)	5.8°F (3.2°C)	127th Coolest	Coolest since: 1997	1965
Aug–Sep 1998 2-Month	64.8°F (18.2°C)	59.0°F (15.0°C)	5.8°F (3.2°C)	2nd Warmest	Warmest to Date	2022
Jul–Sep 1998 3-Month	66.2°F (19.0°C)	61.2°F (16.2°C)	5.0°F (2.8°C)	127th Coolest	Coolest since: 1997	1912
Jul–Sep 1998 3-Month	66.2°F (19.0°C)	61.2°F (16.2°C)	5.0°F (2.8°C)	2nd Warmest	Warmest to Date	2022
Jun–Sep 1998 4-Month	63.3°F (17.4°C)	60.5°F (15.8°C)	2.8°F (1.6°C)	120th Coolest	Coolest since: 1997	1993
	63.3°F (17.4°C)	60.5°F (15.8°C)	2.8°F (1.6°C)	9th Warmest	Warmest since: 1988	2021
	Ties: 2001, 2003, 2006, 2015
May–Sep 1998 5-Month	61.1°F (16.2°C)	58.4°F (14.7°C)	2.7°F (1.5°C)	119th Coolest	Coolest since: 1997	1907
	61.1°F (16.2°C)	58.4°F (14.7°C)	2.7°F (1.5°C)	10th Warmest	Warmest since: 1988	1936
	Ties: 2012
Apr–Sep 1998 6-Month	58.2°F (14.6°C)	55.5°F (13.1°C)	2.7°F (1.5°C)	123rd Coolest	Coolest since: 1997	1907
	58.2°F (14.6°C)	55.5°F (13.1°C)	2.7°F (1.5°C)	6th Warmest	Warmest since: 1988	1936
	Ties: 1919
Mar–Sep 1998 7-Month	54.0°F (12.2°C)	51.7°F (10.9°C)	2.3°F (1.3°C)	113th Coolest	Coolest since: 1997	1965
	54.0°F (12.2°C)	51.7°F (10.9°C)	2.3°F (1.3°C)	16th Warmest	Warmest since: 1994	2012
	Ties: 2000
Feb–Sep 1998 8-Month	51.1°F (10.6°C)	47.9°F (8.8°C)	3.2°F (1.8°C)	124th Coolest	Coolest since: 1997	1899
	51.1°F (10.6°C)	47.9°F (8.8°C)	3.2°F (1.8°C)	5th Warmest	Warmest since: 1988	2012, 2016
	Ties: 2007, 2017
Jan–Sep 1998 9-Month	47.5°F (8.6°C)	44.5°F (6.9°C)	3.0°F (1.7°C)	117th Coolest	Coolest since: 1997	1899
	47.5°F (8.6°C)	44.5°F (6.9°C)	3.0°F (1.7°C)	12th Warmest	Warmest since: 1992	2012
	Ties: 1961
Dec 1997–Sep 1998 10-Month	45.4°F (7.4°C)	42.1°F (5.6°C)	3.3°F (1.8°C)	116th Coolest	Coolest since: 1997	1950
Dec 1997–Sep 1998 10-Month	45.4°F (7.4°C)	42.1°F (5.6°C)	3.3°F (1.8°C)	12th Warmest	Warmest since: 1992	2012
Nov 1997–Sep 1998 11-Month	44.0°F (6.7°C)	41.0°F (5.0°C)	3.0°F (1.7°C)	115th Coolest	Coolest since: 1997	1899
	44.0°F (6.7°C)	41.0°F (5.0°C)	3.0°F (1.7°C)	13th Warmest	Warmest since: 1992	2012
	Ties: 1987, 2003
Oct 1997–Sep 1998 12-Month	43.9°F (6.6°C)	41.2°F (5.1°C)	2.7°F (1.5°C)	118th Coolest	Coolest since: 1997	1899
	43.9°F (6.6°C)	41.2°F (5.1°C)	2.7°F (1.5°C)	10th Warmest	Warmest since: 1992	2012
	Ties: 1992, 2007, 2021
Apr 1997–Sep 1998 18-Month	47.9°F (8.8°C)	45.9°F (7.7°C)	2.0°F (1.1°C)	111th Coolest	Coolest since: 1997	1917
	47.9°F (8.8°C)	45.9°F (7.7°C)	2.0°F (1.1°C)	17th Warmest	Warmest since: 1992	2016
	Ties: 1940
Oct 1996–Sep 1998 24-Month	42.2°F (5.7°C)	41.1°F (5.1°C)	1.1°F (0.6°C)	93rd Coolest	Coolest since: 1997	1917
	42.2°F (5.7°C)	41.1°F (5.1°C)	1.1°F (0.6°C)	34th Warmest	Warmest since: 1995	2016
	Ties: 1939, 1961
Oct 1995–Sep 1998 36-Month	41.6°F (5.3°C)	41.1°F (5.1°C)	0.5°F (0.2°C)	81st Coolest	Coolest since: 1997	1951
	41.6°F (5.3°C)	41.1°F (5.1°C)	0.5°F (0.2°C)	45th Warmest	Warmest since: 1996	2017
	Ties: 1926, 1964, 1981, 1987, 2019
Oct 1994–Sep 1998 48-Month	41.7°F (5.4°C)	41.1°F (5.1°C)	0.6°F (0.3°C)	80th Coolest	Coolest since: 1997	1952
Oct 1994–Sep 1998 48-Month	41.7°F (5.4°C)	41.1°F (5.1°C)	0.6°F (0.3°C)	45th Warmest	Warmest since: 1995	2007, 2017, 2018
Oct 1993–Sep 1998 60-Month	41.9°F (5.5°C)	41.1°F (5.1°C)	0.8°F (0.4°C)	88th Coolest	Coolest since: 1997	1952
	41.9°F (5.5°C)	41.1°F (5.1°C)	0.8°F (0.4°C)	36th Warmest	Warmest since: 1995	2016
	Ties: 1943, 1964, 1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 20, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings