Statewide Rankings

Statewide Data Info
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 2020

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
September 2020
1-Month		57.0°F
(13.9°C)		53.8°F
(12.1°C)		3.2°F
(1.8°C)		108th Coolest
Coolest since:
1965
21st Warmest
Warmest since:
1998
Aug–Sep 2020
2-Month		62.2°F
(16.8°C)		59.0°F
(15.0°C)		3.2°F
(1.8°C)		114th Coolest
Coolest since:
1965
15th Warmest
Warmest since:
2022
Jul–Sep 2020
3-Month		63.3°F
(17.4°C)		61.2°F
(16.2°C)		2.1°F
(1.2°C)		107th Coolest
Coolest since:
1912
22nd Warmest
Warmest since:
2022
Ties: 1919
Jun–Sep 2020
4-Month		62.3°F
(16.8°C)		60.5°F
(15.8°C)		1.8°F
(1.0°C)		105th Coolest
Coolest since:
1993
24th Warmest
Warmest since:
2021
Ties: 1937, 1963
May–Sep 2020
5-Month		60.0°F
(15.6°C)		58.4°F
(14.7°C)		1.6°F
(0.9°C)		109th Coolest
Coolest since:
1907
20th Warmest
Warmest since:
1936
Ties: 1897, 1933
Apr–Sep 2020
6-Month		56.4°F
(13.6°C)		55.5°F
(13.1°C)		0.9°F
(0.5°C)		91st Coolest
Coolest since:
1907
38th Warmest
Warmest since:
1936
Ties: 1922, 1933, 1961, 1981
Mar–Sep 2020
7-Month		52.8°F
(11.6°C)		51.7°F
(10.9°C)		1.1°F
(0.7°C)		90th Coolest
Coolest since:
1965
39th Warmest
Warmest since:
2012
Feb–Sep 2020
8-Month		49.4°F
(9.7°C)		47.9°F
(8.8°C)		1.5°F
(0.9°C)		98th Coolest
Coolest since:
1899
31st Warmest
Warmest since:
2012, 2016
Ties: 1926, 1946, 1976, 1984
Jan–Sep 2020
9-Month		46.5°F
(8.1°C)		44.5°F
(6.9°C)		2.0°F
(1.2°C)		104th Coolest
Coolest since:
1899
25th Warmest
Warmest since:
2012
Ties: 1946, 1984, 1994
Dec 2019–Sep 2020
10-Month		44.5°F
(6.9°C)		42.1°F
(5.6°C)		2.4°F
(1.3°C)		111th Coolest
Coolest since:
1950
17th Warmest
Warmest since:
2012
Ties: 1926, 1983, 1990, 1994, 2005
Nov 2019–Sep 2020
11-Month		43.1°F
(6.2°C)		41.0°F
(5.0°C)		2.1°F
(1.2°C)		103rd Coolest
Coolest since:
1899
25th Warmest
Warmest since:
2012
Ties: 1963
Oct 2019–Sep 2020
12-Month		42.4°F
(5.8°C)		41.2°F
(5.1°C)		1.2°F
(0.7°C)		95th Coolest
Coolest since:
1899
33rd Warmest
Warmest since:
2012
Ties: 1921, 1926, 1946, 1953, 1977
Apr 2019–Sep 2020
18-Month		46.8°F
(8.2°C)		45.9°F
(7.7°C)		0.9°F
(0.5°C)		87th Coolest
Coolest since:
1917
41st Warmest
Warmest since:
2016
Ties: 1964
Oct 2018–Sep 2020
24-Month		41.4°F
(5.2°C)		41.1°F
(5.1°C)		0.3°F
(0.1°C)		71st Coolest
Coolest since:
1917
56th Warmest
Warmest since:
2016
Ties: 1955, 2010
Oct 2017–Sep 2020
36-Month		41.3°F
(5.2°C)		41.1°F
(5.1°C)		0.2°F
(0.1°C)		57th Coolest
Coolest since:
1951
69th Warmest
Warmest since:
2017
Ties: 1910, 1921, 1927, 1943, 1948, 1954, 1984, 1995
Oct 2016–Sep 2020
48-Month		41.8°F
(5.4°C)		41.1°F
(5.1°C)		0.7°F
(0.3°C)		83rd Coolest
Coolest since:
1952
42nd Warmest
Warmest since:
2007, 2017, 2018
Ties: 1933, 1943
Oct 2015–Sep 2020
60-Month		42.5°F
(5.8°C)		41.1°F
(5.1°C)		1.4°F
(0.7°C)		105th Coolest
Coolest since:
1952
19th Warmest
Warmest since:
2016
Ties: 2000

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