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The tables below display average monthly climate and weather indicators in Juneau Alaska.
Temperature by: Fahrenheit / Centigrade
| Juneau Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
-4.3 |
-2.0 |
0.4 |
4.3 |
8.3 |
11.7 |
13.3 |
12.8 |
9.7 |
5.7 |
0.0 |
-2.7 |
4.8 |
| Avg. Max Temperature |
-1.4 |
1.2 |
3.7 |
8.4 |
12.8 |
16.1 |
17.7 |
17.1 |
13.3 |
8.4 |
2.6 |
-0.2 |
8.3 |
| Avg. Min Temperature |
-7.2 |
-5.2 |
-2.9 |
0.1 |
3.8 |
7.2 |
8.9 |
8.5 |
6.1 |
2.9 |
-2.7 |
-5.2 |
1.2 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
0.0 |
< 0.5 |
1.0 |
5.0 |
7.0 |
6.0 |
< 0.5 |
0.0 |
0.0 |
0.0 |
19.0 |
| Days with Min Temp Below Freezing |
25.0 |
22.0 |
23.0 |
14.0 |
3.0 |
< 0.5 |
0.0 |
< 0.5 |
1.0 |
8.0 |
18.0 |
23.0 |
139 |
| | |
| Juneau Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
1265 |
1025 |
1001 |
759 |
558 |
360 |
279 |
310 |
468 |
707 |
990 |
1175 |
8897 |
| Cooling Degree Days |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| | |
| Juneau Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
4.5 |
3.8 |
3.3 |
2.8 |
3.4 |
3.1 |
4.2 |
5.3 |
6.7 |
7.8 |
4.9 |
4.4 |
54.3 |
| Days with Precipitation 0.01 inch or More |
18.0 |
17.0 |
18.0 |
17.0 |
17.0 |
15.0 |
17.0 |
18.0 |
20.0 |
23.0 |
20.0 |
21.0 |
222 |
| Monthly Snowfall (inches) |
25.7 |
19.0 |
15.2 |
3.3 |
0.0 |
< 0.05 |
0.0 |
0.0 |
< 0.05 |
1.0 |
12.5 |
22.3 |
99.0 |
| | |
| Other Juneau Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
8.0 |
8.4 |
8.4 |
8.6 |
8.3 |
7.7 |
7.5 |
7.4 |
8.0 |
9.5 |
8.4 |
8.9 |
8.3 |
| Clear Days |
6.0 |
4.0 |
4.0 |
4.0 |
4.0 |
3.0 |
3.0 |
4.0 |
3.0 |
2.0 |
4.0 |
3.0 |
44.0 |
| Partly Cloudy Days |
3.0 |
3.0 |
3.0 |
4.0 |
4.0 |
4.0 |
5.0 |
5.0 |
3.0 |
2.0 |
2.0 |
2.0 |
41.0 |
| Cloudy Days |
23.0 |
21.0 |
23.0 |
22.0 |
23.0 |
22.0 |
23.0 |
22.0 |
24.0 |
27.0 |
24.0 |
25.0 |
280 |
| Percent of Possible Sunshine |
32.0 |
32.0 |
37.0 |
39.0 |
39.0 |
34.0 |
31.0 |
32.0 |
26.0 |
19.0 |
23.0 |
20.0 |
30.0 |
| Avg. Relative Humidity |
54.0 |
76.5 |
75.0 |
71.5 |
68.0 |
67.0 |
69.0 |
73.5 |
77.0 |
78.0 |
77.0 |
78.0 |
78.5 |
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