Juneau has a mild, maritime climate. The mean annual temperature is 55 degrees Fahrenheit. Winter temperatures seldom drop below 20 degrees Fahrenheit and summer temperatures seldom exceed 65 degrees.

Abundant rainfall contributes to the growth of very large Sitka spruce and Western hemlock in the coastal forests and to abundant fish populations in local waters. Snowfall is heavy in most winters, averaging 101 inches. Statistically, June is the month with the least rainfall.

Juneau, Alaska does not have the “midnight sun” experienced further north in Alaska, but day length is much longer in the summer and much shorter in the winter than in the “Lower 48″ states. Long twilight makes the effective day length longer in summer and shorter in winter than the times shown in the table below.