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 October 2021. For more information, please see Climatological Rankings.


Helena, Montana

Average Temperature Rankings, December 1984

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Period Value 1981-2010
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
December 1984
1-Month
12.5°F
(-10.8°C)
22.1°F
(-5.5°C)
-9.6°F
(-5.3°C)
3rd Coolest Coolest since: 1983 1983
80th Warmest Warmest since: 1982 1957
Nov–Dec 1984
2-Month
23.3°F
(-4.8°C)
27.6°F
(-2.4°C)
-4.3°F
(-2.4°C)
7th Coolest Coolest since: 1983 1985
76th Warmest Warmest since: 1982 1999
Ties: 2010
Oct–Dec 1984
3-Month
29.8°F
(-1.2°C)
33.8°F
(1.0°C)
-4.0°F
(-2.2°C)
7th Coolest Coolest since: 1983 1985
75th Warmest Warmest since: 1982 1953
Ties: 1951
Sep–Dec 1984
4-Month
35.6°F
(2.0°C)
39.9°F
(4.4°C)
-4.3°F
(-2.4°C)
2nd Coolest Coolest to Date 1985
80th Warmest Warmest since: 1983 1953
Aug–Dec 1984
5-Month
42.7°F
(5.9°C)
45.7°F
(7.6°C)
-3.0°F
(-1.7°C)
5th Coolest Coolest since: 1978 1985
77th Warmest Warmest since: 1983 1953
Jul–Dec 1984
6-Month
47.4°F
(8.6°C)
49.8°F
(9.9°C)
-2.4°F
(-1.3°C)
9th Coolest Coolest since: 1983 1985
73rd Warmest Warmest since: 1982 1953
Jun–Dec 1984
7-Month
49.3°F
(9.6°C)
51.6°F
(10.9°C)
-2.3°F
(-1.3°C)
7th Coolest Coolest since: 1983 1985
75th Warmest Warmest since: 1982 2001
Ties: 1978
May–Dec 1984
8-Month
49.9°F
(9.9°C)
52.0°F
(11.1°C)
-2.1°F
(-1.2°C)
7th Coolest Coolest since: 1983 1985
75th Warmest Warmest since: 1982 2001
Ties: 1978, 1993
Apr–Dec 1984
9-Month
49.3°F
(9.6°C)
51.3°F
(10.7°C)
-2.0°F
(-1.1°C)
8th Coolest Coolest since: 1983 1951
74th Warmest Warmest since: 1982 2001
Ties: 1950
Mar–Dec 1984
10-Month
48.2°F
(9.0°C)
49.8°F
(9.9°C)
-1.6°F
(-0.9°C)
14th Coolest Coolest since: 1983 1951
66th Warmest Warmest since: 1982 2007
Ties: 1965, 1993, 2019
Feb–Dec 1984
11-Month
46.8°F
(8.2°C)
47.8°F
(8.8°C)
-1.0°F
(-0.6°C)
24th Coolest Coolest since: 1982 1951
56th Warmest Warmest since: 1983 2015
Ties: 1952, 1986
Jan–Dec 1984
12-Month
45.3°F
(7.4°C)
45.8°F
(7.7°C)
-0.5°F
(-0.3°C)
36th Coolest Coolest since: 1982 1951
44th Warmest Warmest since: 1983 2015
Ties: 1945, 2011, 2018
Jul 1983–Dec 1984
18-Month
45.9°F
(7.7°C)
47.2°F
(8.4°C)
-1.3°F
(-0.7°C)
22nd Coolest Coolest since: 1979 1985
56th Warmest Warmest since: 1983 2016
Ties: 1948
Jan 1983–Dec 1984
24-Month
45.4°F
(7.4°C)
45.8°F
(7.7°C)
-0.4°F
(-0.3°C)
37th Coolest Coolest since: 1983 1951
39th Warmest Warmest since: 1982 2016
Jan 1982–Dec 1984
36-Month
44.9°F
(7.2°C)
45.8°F
(7.7°C)
-0.9°F
(-0.5°C)
23rd Coolest Coolest since: 1979 1951
49th Warmest Warmest since: 1983 2017
Ties: 1998, 2010
Jan 1981–Dec 1984
48-Month
45.5°F
(7.5°C)
45.8°F
(7.7°C)
-0.3°F
(-0.2°C)
37th Coolest Coolest since: 1979 1951, 1952
31st Warmest Warmest since: 1969 2001, 2018
Ties: 1988, 1995
Jan 1980–Dec 1984
60-Month
-- 0.0°F
(-17.8°C)
-- -- -- 1952
-- -- 2007
Ties: 1955, 1956, 1957, 1958, 1959, 1980, 1981, 1982, 1983, 2014, 2015, 2016, 2017, 2018

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: City Time Series, published November 2021, retrieved on December 1, 2021 from https://www.ncdc.noaa.gov/cag/