Climate at a Glance

City Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of August 2019. For more information, please see Climatological Rankings.


Helena, Montana

Average Temperature Rankings, May 2018

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1981-2010
Mean
Amomaly Rank
(1938-2019)
Warmest/Coolest
Since
Record
May 2018
1-Month
57.8°F
(14.3°C)
53.8°F
(12.1°C)
4.0°F
(2.2°C)
76th Coolest Coolest since: 2017 2010
6th Warmest Warmest since: 2001 1958
Ties: 1939
Apr–May 2018
2-Month
50.2°F
(10.1°C)
49.3°F
(9.6°C)
0.9°F
(0.5°C)
59th Coolest Coolest since: 2015 1975
23rd Warmest Warmest since: 2017 1987
Ties: 1946, 1962
Mar–May 2018
3-Month
44.4°F
(6.9°C)
44.9°F
(7.2°C)
-0.5°F
(-0.3°C)
46th Coolest Coolest since: 2013 1975
34th Warmest Warmest since: 2017 1992
Ties: 1990
Feb–May 2018
4-Month
37.4°F
(3.0°C)
40.5°F
(4.7°C)
-3.1°F
(-1.7°C)
15th Coolest Coolest since: 2011 2019
65th Warmest Warmest since: 2017 1992
Jan–May 2018
5-Month
34.5°F
(1.4°C)
37.0°F
(2.8°C)
-2.5°F
(-1.4°C)
22nd Coolest Coolest since: 1996 1943
58th Warmest Warmest since: 2017 1992
Dec 2017–May 2018
6-Month
31.7°F
(-0.2°C)
34.4°F
(1.3°C)
-2.7°F
(-1.5°C)
18th Coolest Coolest since: 1996 1949
61st Warmest Warmest since: 2017 1992
Ties: 1964, 1973
Nov 2017–May 2018
7-Month
31.7°F
(-0.2°C)
34.2°F
(1.2°C)
-2.5°F
(-1.4°C)
24th Coolest Coolest since: 2011 1979
55th Warmest Warmest since: 2017 2000
Oct 2017–May 2018
8-Month
33.4°F
(0.8°C)
35.5°F
(1.9°C)
-2.1°F
(-1.1°C)
24th Coolest Coolest since: 2010 1949
54th Warmest Warmest since: 2017 2000
Ties: 1959
Sep 2017–May 2018
9-Month
36.1°F
(2.3°C)
37.9°F
(3.3°C)
-1.8°F
(-1.0°C)
25th Coolest Coolest since: 2001 1949
53rd Warmest Warmest since: 2017 2000
Ties: 1959
Aug 2017–May 2018
10-Month
39.6°F
(4.2°C)
41.0°F
(5.0°C)
-1.4°F
(-0.8°C)
28th Coolest Coolest since: 2011 1949, 1979
50th Warmest Warmest since: 2017 2000
Ties: 1945, 1947, 2010
Jul 2017–May 2018
11-Month
43.0°F
(6.1°C)
43.6°F
(6.4°C)
-0.6°F
(-0.3°C)
33rd Coolest Coolest since: 2011 1949
45th Warmest Warmest since: 2017 2016
Ties: 1944, 1982, 1994
Jun 2017–May 2018
12-Month
44.8°F
(7.1°C)
45.2°F
(7.3°C)
-0.4°F
(-0.2°C)
42nd Coolest Coolest since: 2011 1949
36th Warmest Warmest since: 2017 2016
Ties: 1976, 2005
Dec 2016–May 2018
18-Month
40.7°F
(4.8°C)
41.6°F
(5.3°C)
-0.9°F
(-0.5°C)
31st Coolest Coolest since: 2011 1950
44th Warmest Warmest since: 2017 2000
Ties: 1975
Jun 2016–May 2018
24-Month
45.2°F
(7.3°C)
45.2°F
(7.3°C)
0.0°F
(0.0°C)
52nd Coolest Coolest since: 2012 1952
22nd Warmest Warmest since: 2017 2000, 2017
Ties: 1989, 1990, 1993, 2002
Jun 2015–May 2018
36-Month
46.3°F
(7.9°C)
45.2°F
(7.3°C)
1.1°F
(0.6°C)
67th Coolest Coolest since: 2013 1951
3rd Warmest Warmest since: 2000 1992, 2000
Jun 2014–May 2018
48-Month
-- 0.0°F
(-17.8°C)
-- -- -- 1952
-- -- 2002
Ties: 1955, 1956, 1957, 1958, 1981, 1982, 1983, 1984, 2014, 2015, 2016, 2017
Jun 2013–May 2018
60-Month
-- 0.0°F
(-17.8°C)
-- -- -- 1952
-- -- 1992, 2002

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: City Time Series, published September 2019, retrieved on September 19, 2019 from https://www.ncdc.noaa.gov/cag/