Juneau weather in August
Temperature, rain and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Poor
Best time to visit: April – June
What is the weather like in Juneau in August?
In August, Juneau is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. Expect around 5 hours of sunshine a day. It rains often – on about 19 days, adding up to 227 mm. All in all, August is not an ideal month for a holiday in Juneau.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 7 | 6 | 0 |
| Day | 17° | 17° | 13° |
| Night | 11° | 11° | 8° |
| Sun | 5 h | 5 h | 3 h |
| Rain days | 18 | 19 | 21 |
More details for August
- Daylight
- 15 h 30 min05:18 – 20:47
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 76 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−8America/Juneau
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %30 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Juneau in August: quick answers
Is Juneau hot in August?
No. In August, Juneau is mild: daytime highs average 17 °C and nights drop to about 11 °C.
Does it rain much in Juneau in August?
It rains often – on about 19 days, adding up to 227 mm.
Juneau month by month
The whole year in JuneauAll destinations: USAWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences