Temperatures in August
It's cool to moderate in August in Juneau with an average temperature of 17°C. Temperatures this month range from a low of 15°C to a high of 21°C. At night, you can expect temperatures between 10°C and 15°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Juneau 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 Juneau 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 17°C, with nights close to 13°C. The chance of precipitation is high during this period. Opt for a light coat, jumper or cardigan, and long trousers.
End of August
By the end of August, the average daytime temperature in Juneau will be around 16°C, with nights close to 11°C. There’s a significant chance of many days with precipitation.
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Precipitation in August
In August, there is an average of 242 mm of precipitation, spread over 17 days. The wind speed is around 3 Bft, mostly coming from the South.
Across the whole month, the average precipitation chance is 56% per day. Though that seems frequent, the weather’s variable. Some days have high and others have lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for Juneau. 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.
Juneau in August |
London | ||
|---|---|---|---|
 Average Temperature |
17°C | 22°C | |
 High Temp |
21°C | 24°C | |
| Low Temp |
15°C | 19°C | |
 Total Precipitation |
242 mm | 60 mm | |
| Rainy Days |
17 days | 10 days | |
July
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is August a good time to visit Juneau?
Looking for sun and warm weather? Then August isn’t the best time to be in Juneau. The temperature is too low this month for a warm stay.
Temperature records for Juneau in August
With 28°C, Juneau hit the highest temperature in the last 10 years in August 2019. The lowest daytime temperature in this month was 10°C in 2015. The extreme night temperatures ranged from a low of 5°C to a high of 18°C.
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Daily Temperature in August in Juneau
This chart shows the average daily temperatures, both day and night, for each day in August in Juneau, 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 Juneau
The chart below shows the average daily precipitation in August for Juneau, 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 17 days of rain in Juneau.
Daily UV Index in August in Juneau
This chart shows the average daily UV index in August in Juneau, 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 Juneau Over the Years
This chart shows the average temperature in August in Juneau, measured in degrees Celsius, over the past years.
Total Precipitation in August in Juneau Over the Years
This chart shows the average precipitation in August in Juneau, 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 Juneau
Click on a specific day in August for detailed info on the typical weather on that day in Juneau. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Juneau
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Average Weather in Juneau by Month
Click on a month below to see detailed weather info for Juneau. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
