Temperatures in August
It's pleasantly warm in August in Ketchikan with an average temperature of 19°C. Temperatures this month range from a low of 17°C to a high of 21°C. At night, you can expect temperatures between 11°C and 14°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Ketchikan in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in Ketchikan with mild temperatures, averaging around 20°C during the day and nights close to 14°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-August
By mid-August, the average daytime temperature drops to around 19°C, with nights close to 14°C. The chance of precipitation is high during this period.
End of August
By the end of August, the average daytime temperature in Ketchikan will be around 18°C, with nights close to 13°C. There’s a significant chance of many days with precipitation.
Discover cheap trips to Ketchikan 
Water temperature
The water temperature at Ketchikan is 16°C this month. This is probably too cold to swim without protective gear.
Precipitation in August
In August, there is an average of 306 mm of precipitation, spread over 15 days. The wind speed is around 4 Bft, mostly coming from the South.
Across the whole month, the average precipitation chance is 50% per day. Though it seems average, the weather’s variable. Some days have higher, others lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for Ketchikan. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Ketchikan in August |
London | ||
|---|---|---|---|
 Average Temperature |
19°C | 22°C | |
 High Temp |
21°C | 24°C | |
| Low Temp |
17°C | 19°C | |
 Total Precipitation |
306 mm | 60 mm | |
| Rainy Days |
15 days | 10 days | |
July
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit Ketchikan?
After some sun? Then August isn’t the best time to be in Ketchikan. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Ketchikan in August
With 27°C, Ketchikan hit the highest temperature in the last 10 years in August 2017. The lowest daytime temperature in this month was 12°C in 2020. The extreme night temperatures ranged from a low of 6°C to a high of 18°C.
Check out the climate of Ketchikan for all months and discover the best travel time
Plan your next holiday
Don’t miss the best holiday deals for Ketchikan and see what our partners have for you.
Daily Temperature in August in Ketchikan
This chart shows the average daily temperatures, both day and night, for each day in August in Ketchikan, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Ketchikan
The chart below shows the average daily precipitation in August for Ketchikan, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 15 days of rain in Ketchikan.
Daily UV Index in August in Ketchikan
This chart shows the average daily UV index in August in Ketchikan, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Ketchikan Over the Years
This chart shows the average temperature in August in Ketchikan, measured in degrees Celsius, over the past years.
Total Precipitation in August in Ketchikan Over the Years
This chart shows the average precipitation in August in Ketchikan, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Ketchikan
Click on a specific day in August for detailed info on the typical weather on that day in Ketchikan. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Ketchikan
Have you been to Ketchikan in August?
Share your weather experience in August in Ketchikan.
Average Weather in Ketchikan by Month
Click on a month below to see detailed weather info for Ketchikan. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Ketchikan for all months at once
