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 2021

View Period (Months):
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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 2021
1-Month
58.3°F
(14.6°C)
53.8°F
(12.1°C)
4.5°F
(2.5°C)
115th Coolest
Coolest since:
1965
14th Warmest
Warmest since:
1998
Ties: 2011
Aug–Sep 2021
2-Month
61.5°F
(16.4°C)
58.9°F
(14.9°C)
2.6°F
(1.5°C)
107th Coolest
Coolest since:
1965
22nd Warmest
Warmest since:
2022
Jul–Sep 2021
3-Month
65.2°F
(18.4°C)
61.2°F
(16.2°C)
4.0°F
(2.2°C)
126th Coolest
Coolest since:
1912
3rd Warmest
Warmest since:
2022
Ties: 1936, 2012
Jun–Sep 2021
4-Month
65.2°F
(18.4°C)
60.5°F
(15.8°C)
4.7°F
(2.6°C)
128th Coolest
Coolest since:
1993
1st Warmest
Warmest to Date
2021
May–Sep 2021
5-Month
61.9°F
(16.6°C)
58.4°F
(14.7°C)
3.5°F
(1.9°C)
127th Coolest
Coolest since:
1907
2nd Warmest
Warmest since:
1936
Ties: 1988
Apr–Sep 2021
6-Month
58.3°F
(14.6°C)
55.4°F
(13.0°C)
2.9°F
(1.6°C)
124th Coolest
Coolest since:
1907
5th Warmest
Warmest since:
1936
Mar–Sep 2021
7-Month
55.1°F
(12.8°C)
51.7°F
(10.9°C)
3.4°F
(1.9°C)
125th Coolest
Coolest since:
1965
4th Warmest
Warmest since:
2012
Feb–Sep 2021
8-Month
50.0°F
(10.0°C)
48.0°F
(8.9°C)
2.0°F
(1.1°C)
109th Coolest
Coolest since:
1899
20th Warmest
Warmest since:
2012, 2016
Ties: 2005
Jan–Sep 2021
9-Month
47.4°F
(8.6°C)
44.5°F
(6.9°C)
2.9°F
(1.7°C)
115th Coolest
Coolest since:
1899
14th Warmest
Warmest since:
2012
Ties: 2000
Dec 2020–Sep 2021
10-Month
45.5°F
(7.5°C)
42.1°F
(5.6°C)
3.4°F
(1.9°C)
117th Coolest
Coolest since:
1950
11th Warmest
Warmest since:
2012
Nov 2020–Sep 2021
11-Month
44.3°F
(6.8°C)
40.9°F
(4.9°C)
3.4°F
(1.9°C)
122nd Coolest
Coolest since:
1899
6th Warmest
Warmest since:
2012
Ties: 1931, 1988, 2015
Oct 2020–Sep 2021
12-Month
43.9°F
(6.6°C)
41.1°F
(5.1°C)
2.8°F
(1.5°C)
118th Coolest
Coolest since:
1899
10th Warmest
Warmest since:
2012
Ties: 1992, 1998, 2007
Apr 2020–Sep 2021
18-Month
48.1°F
(8.9°C)
45.9°F
(7.7°C)
2.2°F
(1.2°C)
116th Coolest
Coolest since:
1917
12th Warmest
Warmest since:
2016
Ties: 1992, 2013
Oct 2019–Sep 2021
24-Month
43.2°F
(6.2°C)
41.2°F
(5.1°C)
2.0°F
(1.1°C)
116th Coolest
Coolest since:
1917
11th Warmest
Warmest since:
2016
Ties: 1981, 1992
Oct 2018–Sep 2021
36-Month
42.3°F
(5.7°C)
41.2°F
(5.1°C)
1.1°F
(0.6°C)
99th Coolest
Coolest since:
1951
27th Warmest
Warmest since:
2017
Ties: 1991
Oct 2017–Sep 2021
48-Month
42.0°F
(5.6°C)
41.1°F
(5.1°C)
0.9°F
(0.5°C)
92nd Coolest
Coolest since:
1952
33rd Warmest
Warmest since:
2007, 2017, 2018
Ties: 1935, 1961, 1984
Oct 2016–Sep 2021
60-Month
42.3°F
(5.7°C)
41.1°F
(5.1°C)
1.2°F
(0.6°C)
101st Coolest
Coolest since:
1952
23rd Warmest
Warmest since:
2016
Ties: 1934, 1942, 2013, 2022

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