Gustavus Weather in September

Gustavus in September sees moderate temperatures, with highs around 13°C (55°F) and overnight lows of 9°C (48°F). With the rainy season in full effect, expect around 364 mm (14 in) of rainfall and regular showers throughout the month.

Rainfall in Gustavus in September

As part of the rainy season, Gustavus sees around 19 days of rain in September, with an average of 364 mm (14 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.

Temperature in Gustavus in September

Daytime temperatures in Gustavus reach 13°C (55°F) in September, dropping to 9°C (48°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Gustavus in September

The area enjoys a balanced 112 hours of sunlight, ensuring it's neither too rainy nor too sunny.

September in Gustavus can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.