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 1999

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1999
1-Month
51.6°F
(10.9°C)
53.8°F
(12.1°C)
-2.2°F
(-1.2°C)
24th Coolest
Coolest since:
1965
105th Warmest
Warmest since:
1998
Ties: 1993
Aug–Sep 1999
2-Month
59.0°F
(15.0°C)
58.9°F
(14.9°C)
0.1°F
(0.1°C)
60th Coolest
Coolest since:
1965
69th Warmest
Warmest since:
2022
Ties: 1923, 1957, 1960
Jul–Sep 1999
3-Month
60.7°F
(15.9°C)
61.2°F
(16.2°C)
-0.5°F
(-0.3°C)
40th Coolest
Coolest since:
1912
89th Warmest
Warmest since:
2022
Ties: 1901, 1941, 1956, 1975, 2010
Jun–Sep 1999
4-Month
59.8°F
(15.4°C)
60.5°F
(15.8°C)
-0.7°F
(-0.4°C)
34th Coolest
Coolest since:
1993
95th Warmest
Warmest since:
2021
Ties: 1908, 1943
May–Sep 1999
5-Month
57.5°F
(14.2°C)
58.4°F
(14.7°C)
-0.9°F
(-0.5°C)
27th Coolest
Coolest since:
1907
102nd Warmest
Warmest since:
1936
Ties: 1954, 1964, 1974
Apr–Sep 1999
6-Month
54.6°F
(12.6°C)
55.4°F
(13.0°C)
-0.8°F
(-0.4°C)
27th Coolest
Coolest since:
1907
102nd Warmest
Warmest since:
1936
Ties: 1929, 1935, 1959, 1964, 1972, 1995, 2010
Mar–Sep 1999
7-Month
51.8°F
(11.0°C)
51.7°F
(10.9°C)
0.1°F
(0.1°C)
59th Coolest
Coolest since:
1965
70th Warmest
Warmest since:
2012
Ties: 1989
Feb–Sep 1999
8-Month
49.1°F
(9.5°C)
47.9°F
(8.8°C)
1.2°F
(0.7°C)
91st Coolest
Coolest since:
1899
38th Warmest
Warmest since:
2012, 2016
Ties: 1997, 2004
Jan–Sep 1999
9-Month
46.1°F
(7.8°C)
44.4°F
(6.9°C)
1.7°F
(0.9°C)
94th Coolest
Coolest since:
1899
35th Warmest
Warmest since:
2012
Ties: 1921, 1941
Dec 1998–Sep 1999
10-Month
43.6°F
(6.4°C)
42.0°F
(5.6°C)
1.6°F
(0.8°C)
91st Coolest
Coolest since:
1950
37th Warmest
Warmest since:
2012
Ties: 1946, 1953
Nov 1998–Sep 1999
11-Month
42.7°F
(5.9°C)
41.0°F
(5.0°C)
1.7°F
(0.9°C)
98th Coolest
Coolest since:
1899
30th Warmest
Warmest since:
2012
Ties: 1994
Oct 1998–Sep 1999
12-Month
42.8°F
(6.0°C)
41.1°F
(5.1°C)
1.7°F
(0.9°C)
102nd Coolest
Coolest since:
1899
26th Warmest
Warmest since:
2012
Ties: 1958, 1994
Apr 1998–Sep 1999
18-Month
48.0°F
(8.9°C)
46.0°F
(7.8°C)
2.0°F
(1.1°C)
113th Coolest
Coolest since:
1917
15th Warmest
Warmest since:
2016
Ties: 2017
Oct 1997–Sep 1999
24-Month
43.4°F
(6.3°C)
41.2°F
(5.1°C)
2.2°F
(1.2°C)
117th Coolest
Coolest since:
1917
10th Warmest
Warmest since:
2016
Oct 1996–Sep 1999
36-Month
42.4°F
(5.8°C)
41.1°F
(5.1°C)
1.3°F
(0.7°C)
103rd Coolest
Coolest since:
1951
23rd Warmest
Warmest since:
2017
Ties: 1935, 1942, 2003
Oct 1995–Sep 1999
48-Month
41.9°F
(5.5°C)
41.1°F
(5.1°C)
0.8°F
(0.4°C)
88th Coolest
Coolest since:
1952
37th Warmest
Warmest since:
2007, 2017, 2018
Ties: 1936, 1940, 1963, 1995
Oct 1994–Sep 1999
60-Month
41.9°F
(5.5°C)
41.1°F
(5.1°C)
0.8°F
(0.4°C)
88th Coolest
Coolest since:
1952
36th Warmest
Warmest since:
2016
Ties: 1943, 1964, 1998

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