Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
During August, Juneau observes a subtle ascent to a fresh 54.1°F (12.3°C) from July's 55.8°F (13.2°C) in the average high-temperature. August nights experience a consistent temperature drop to a frosty 44.6°F (7°C).Humidity
In August, the average relative humidity is 90%.Rainfall
In August, the rain falls for 21.6 days. Throughout August, 7.56" (192mm) of precipitation is accumulated. In Juneau, during the entire year, the rain falls for 172.4 days and collects up to 85.87" (2181mm) of precipitation.Snowfall
June through September are months without snowfall.Ocean temperature
With an average ocean temperature of 53.4°F (11.9°C), August is the month with the warmest seawater.Note: Unprotected swimming in 53.4°F (11.9°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
In Juneau, the average length of the day in August is 15h and 17min.On the first day of the month, sunrise is at 4:51 am and sunset at 9:16 pm. On the last day of August, in Juneau, sunrise is at 5:56 am and sunset at 7:58 pm AKDT.
Sunshine
The average sunshine in August is 5.1h.UV index
The average daily maximum UV index in August is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 2 in August suggests the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
What is the month with the warmest ocean?
What is the ocean temperature in August?
How many hours of daylight does Juneau have in August?
When are sunrise and sunset in August?
How many hours of sunshine does Juneau have in August?
What is the UV index reading in August?
Average temperature in August
Juneau, AK
- Average high temperature in August: 54.1°F
The warmest month (with the highest average high temperature) is July (55.8°F).
The months with the lowest average high temperature are January and December (25.7°F).
- Average low temperature in August: 44.6°F
The month with the highest average low temperature is July (45.1°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).
Average pressure in August
Juneau, AK
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is July (30.03"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in August
Juneau, AK
- Average wind speed in August: 4.2mph
The windiest month (with the highest average wind speed) is January (6.9mph).
The calmest months (with the lowest average wind speed) are June and July (3.7mph).
Average humidity in August
Juneau, AK
- Average humidity in August: 90%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (86%).
Average rainfall in August
Juneau, AK
- Average rainfall in August: 7.56"
The wettest month (with the highest rainfall) is October (9.88").
The driest month (with the least rainfall) is May (4.13").
Average rainfall days in August
Juneau, AK
- Average rainfall days in August: 21.6 days
The month with the highest number of rainy days is September (21.9 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in August
Juneau, AK
- Average snowfall in August: 0"
The month with the highest snowfall is December (62.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Juneau, AK
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (21.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in August
Juneau, AK
- Average sea temperature in August: 53.5°F
The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is March (40.3°F).
Average daylight in August /
Average sunshine in August
Juneau, AK
- Average daylight in August: 15h and 2min
The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in August: 5h and 1min
The month with the most sunshine is June (Average sunshine: 6h and 24min).
The month with the least sunshine is November (Average sunshine: 2h and 36min).
Average sunshine days in August
Juneau, AK
- Average sunshine days in August: 7.3 days
The month with the most sunshine days is May (10 days).
The month with the least sunshine days is November (6.1 days).
Average UV index in August
Juneau, AK
- Average UV index in August: 2
The months with the highest UV index are May and July (UV index 3).
The months with the lowest UV index are January, April, October, November and December (UV index 1).
Average cloud cover in August
Juneau, AK
- Average cloud cover in August: 70
The months with the most cloud cover are January and November (Cloud cover 72).
The month with the least cloud cover is May (Cloud cover 61).
Average visibility in August
Juneau, AK
- Average visibility in August: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Juneau, Alaska, USA
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