Juneau Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Juneau, Alaska during each month of the year.

The average high and low temperatures are listed below monthly and annually for Juneau, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 50, 60 or 70 °F each month in Juneau, scroll down farther. There are also monthly and yearly counts of days with cold weather.

All the numbers are averages, based on climate data gathered from 1981 to 2010.

Average Juneau temperatures
High °F Low °F   High °C Low °C
35 26 January 1 -3
37 28 February 3 -2
41 30 March 5 -1
49 35 April 10 2
57 42 May 14 6
62 48 June 17 9
63 51 July 17 11
63 50 August 17 10
57 46 September 14 8
48 39 October 9 4
40 31 November 4 0
37 28 December 3 -2
49 38 Year 10 3

Days of Warm Weather in Juneau

A warm summer day in Juneau means temperatures in the 70s Fahrenheit. The city normally sees 17 days a year above 69 degrees, which show up sporadically from May until September. Just once a year on average, one day here heats up to 80 °F.

Days per month in Juneau of at least 50, 60 or 70 °F
  50 °F
10 °C
60 °F
16 °C
70 °F
21 °C
January 0 0 0
February 0 0 0
March 1 0 0
April 12 2 0
May 26 10 2
June 30 17 5
July 31 20 5
August 31 18 5
September 29 7 1
October 12 0 0
November 1 0 0
December 1 0 0
Year 172 74 17

How Often Juneau Has Cold Temperatures

Freezing temperatures can happen in Juneau anytime from September until May. Juneau typically sees 101 frosty nights a year. The coldest nights drop down to below 0 °F (-18 °C). But the temperature doesn't go that low here every year.

For an average of 29 days annually the thermometer never rises above freezing. Days that chilly usually show up during November to March.

Days in Juneau with a minimum temperature that drops to 32, 20 and 10 °F or lower
  10 °F
-12 °C
20 °F
-8 °C
32 °F
0 °C
January 2 7 22
February 1 5 19
March 0 3 17
April 0 0 6
May 0 0 0
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 0
October 0 0 4
November 1 3 14
December 1 6 20
Year 5 23 101
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

Alaska Temperatures
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