The highest day temperature in August 2023 was 68°F. The lowest night temperature was 54°F. The average values for day and night temperatures during August were 61.4°F и 57.7°F respectivly.

The average sea surface temperature in August 2023 for Ketchikan was 62.2°F. The maximum and minimum values were 59.2°F and 65.0°F respectively.

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

Precipitation total in August for Ketchikan is 5.4 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 8.2 mph. It makes August one of the most windless months of the year for Ketchikan.

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 Ketchikan in August is 5.7 hours.