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
As Juneau welcomes August, the average high-temperature stabilizes at a cool 54.1°F (12.3°C), showing little deviation from July's 55.8°F (13.2°C). Juneau, during August nights, observes an average temperature of 44.6°F (7°C).Humidity
The average relative humidity in August in Juneau is 90%.Rainfall
In August, the rain falls for 21.6 days. Throughout August, 7.56" (192mm) of precipitation is accumulated. Throughout the year, there are 172.4 rainfall days, and 85.87" (2181mm) of precipitation is accumulated.Snowfall
In Juneau, snow does not fall in June through September.Ocean temperature
With an average ocean temperature of 53.4°F (11.9°C), August is the month with the warmest seawater.Note: Diving into 53.4°F (11.9°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
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, sunrise is at 5:56 am and sunset at 7:58 pm AKDT.
Sunshine
In Juneau, the average sunshine in August is 5.1h.UV index
The average daily maximum UV index in August in Juneau is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 in August translates into this advice:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are August temperatures in Juneau?
What is the average humidity in August in Juneau?
How much does it rain in Juneau in August?
When it does not snow in Juneau?
When is the ocean warmest in Juneau?
What is the water temperature in August in Juneau?
What is the average length of the day in August in Juneau?
When is the sunrise / sunset in August in Juneau?
How long on average sun shines in August in Juneau?
What is the UV index reading in August in Juneau?
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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