Juneau Weather in September

September in Juneau brings low temperatures, with highs of 11°C (52°F) and nights dropping to 5°C (41°F). It's the rainiest month of the year, so come prepared with waterproof gear.

Rainfall in Juneau in September

As part of the rainy season, Juneau sees around 19 days of rain in September, with an average of 368 mm (14 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.

Temperature in Juneau in September

September in Juneau brings low temperatures, with highs of 11°C (52°F) and nights around 5°C (41°F). The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Juneau in September

The area enjoys a moderate level of sunlight, with around 112 hours. It's a good balance between sunny and rainy days.

Wind Speed in Juneau in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

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