Alaska (Juneau) · August
Best travel monthPeak seasonUSA · North America
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 2° (36°)-8– (18–)7 (45) | 2° (36°)-6– (21–)8 (46) | 4° (39°)-3– (27–)9 (48) | 9° (48°)3– (37–)15 (59) | 14° (57°)7– (45–)22 (72) | 16° (61°)10– (50–)25 (77) | 17° (63°)12– (54–)24 (75) | 17° (63°)11– (52–)23 (73) | 13° (55°)9– (48–)18 (64) | 9° (48°)4– (39–)13 (55) | 4° (39°)-3– (27–)9 (48) | 2° (36°)-6– (21–)7 (45) |
Ø night, range from coldest to warmest nightØ nightrange | -2° (28°)-13– (9–)4 (39) | -2° (28°)-12– (10–)3 (37) | -1° (30°)-9– (16–)3 (37) | 2° (36°)-3– (27–)6 (43) | 7° (45°)1– (34–)10 (50) | 10° (50°)5– (41–)13 (55) | 12° (54°)8– (46–)13 (55) | 11° (52°)7– (45–)14 (57) | 9° (48°)3– (37–)12 (54) | 5° (41°)-2– (28–)9 (48) | 0° (32°)-8– (18–)5 (41) | -1° (30°)-10– (14–)4 (39) |
☀️Sunshine | 1h UV 1 | 3h UV 2 | 4h UV 4 | 6h UV 5 | 8h UV 6 | 6h UV 6 | 5h UV 5 | 5h UV 4 | 2h UV 3 | 3h UV 2 | 3h UV 2 | 2h UV 1 |
🌊Water Temp | 6° (43°) | 5° (41°) | 5° (41°) | 6° (43°) | 8° (46°) | 11° (52°) | 13° (55°) | 14° (57°) | 13° (55°) | 11° (52°) | 8° (46°) | 7° (45°) |
🌧Rain Days | 16d176mm (6.9") | 11d108mm (4.2") | 11d90mm (3.5") | 11d94mm (3.7") | 10d96mm (3.8") | 10d103mm (4.0") | 13d134mm (5.3") | 15d175mm (6.9") | 18d229mm (9.0") | 17d219mm (8.6") | 16d165mm (6.5") | 14d155mm (6.1") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Peak season — flights and hotels at their annual highest. Book early.
August is one of the best travel months for Alaska (Juneau) — conditions are stable, temperatures reach 17°C (63°F), and outdoor activities are excellent.
Daytime highs average 17°C (63°F), cooling to 11°C (52°F) at night (daily average: 14°C (57°F)). Peaks reach around 23°C (73°F), the coldest nights around 7°C (45°F). With 5 sunshine hours per day and 15 rain days (175 mm (6.9 in)), this is one of the cloudier months. At 14°C (57°F), the water is still quite cool in August — a wetsuit may be useful.
Layer up — warm days and cool evenings alternate. Perfect timing for hikes and sightseeing.
High summer in Juneau: long days, a full harbour every day, and whale-watching boats leaving by the hour. It is mild but rarely properly warm, and cloud comes with the territory. Salmon run up the rivers and bears appear along the creeks.
Events & Festivals
- Golden North Salmon Derbyearly/mid-August (Fri–Sun)
This salmon fishing tournament has run every year since 1947, over three days in the waters around Juneau.
Packing list for Alaska (Juneau) in August
- Long-sleeved shirts and light trousers
- Light jacket
- Sunscreen
- Sunglasses
- Rain jacket and waterproof shoes
- Travel first-aid kit
Frequently Asked Questions
- Is August a good time to visit Alaska (Juneau)?
- Yes — August is one of the best months to visit Alaska (Juneau) (Climate Score: 43/100). Pleasant temperatures (17°C (63°F)), good sunshine (5 h/day), and few rain days (15) make it one of the most recommended months.
- How warm is it in Alaska (Juneau) in August?
- In August, Alaska (Juneau) sees daily highs of 17°C (63°F). Nights cool to 11°C (52°F), with a daily average of 14°C (57°F). Peaks reach around 23°C (73°F), the coldest nights around 7°C (45°F).
- How much rain falls in Alaska (Juneau) in August?
- In August, Alaska (Juneau) receives an average of 175 mm (6.9 in) of rain over 15 rain days. With frequent rain days, waterproof clothing is recommended.
- How many sunshine hours does Alaska (Juneau) get in August?
- Alaska (Juneau) averages 5 sunshine hours per day in August — above the annual average.
- How warm is the water in Alaska (Juneau) in August?
- Water temperature in Alaska (Juneau) in August averages 14°C (57°F) — still quite cool — a wetsuit may be useful.
