The highest day temperature in August 2026 was 60°F. The lowest night temperature was 30°F. The average values for day and night temperatures during August were 48.3°F и 41.8°F respectivly.

The average sea surface temperature in August 2026 for Juneau was 57.5°F. The maximum and minimum values were 54.2°F and 60.2°F respectively.

Most of the days in August are gloomy but you can also expect sunny days.

Precipitation total in August for Juneau is 3.4 in.

The average wind speed in August is 4.1 mph. It makes August one of the most windless months of the year for Juneau.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Juneau in August is 4.6 hours.