Shoulder Season

Juneau in September 2026

Travellers combining Southeast Alaska glacier and whale watching with occasional aurora sightings. Here's everything you need to plan your September visit.

✦5/10

🌡️ Weather in Juneau in September

9°C

Avg Temperature

mild — light jacket and layers

Dark Hours / Night

Some darkness — limited aurora viewing window

🟠 Low

Aurora Likelihood

Aurora unlikely but not impossible — short windows with high solar activity

September in Juneau sits at 9°C average, which is mild — light jacket and layers. Expect around 4 hours of darkness each night. Pack accordingly and check the detailed packing list below.

🌌 Northern Lights in September

🟠 Low likelihood· Aurora score 5/10

Juneau has a base aurora score of 5/10. In September, aurora chances are limited — only 4 hours of darkness and typically lower Kp levels reduce visibility. Patience and luck are required.

Tips for aurora chasing in September: Head away from town light pollution, check real-time Kp forecasts (apps like SpaceWeatherLive or My Aurora Forecast), and allow at least 3 nights to maximise your chances of a sighting.

🎯 What to Do in Juneau in September

✓Whale Watching

✓Kayaking

✓Hiking & Trekking

✓Wildlife Watching

✓Photography Tours

Activity availability depends on snow / ice conditions and local operator schedules. Always confirm in advance.

🎒 What to Pack for September in Juneau

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Light to mid-weight layers — mornings and evenings remain cool

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Comfortable walking shoes; waterproof layer for unexpected rain

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Sunscreen and sunglasses — polar sun can be intense

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Dry bag for electronics; most operators provide drysuits but check in advance

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Sea sickness prevention if boat trips are planned

📦 View the full interactive packing list for Juneau →

🏨 Accommodation in September

Shoulder Season

Shoulder season offers a sweet spot: fewer crowds but conditions are still good. Prices average $60/night for mid-range. Downtown hotels, Glacier View lodges, B&Bs are available. Booking 4–6 weeks ahead is usually sufficient.