Duluth Weather in September

September in Duluth sees daytime temperatures around 19°C (66°F) and lows of 9°C (48°F) at night. With around 72 mm (2.8 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Duluth in September

Expect around 13 days of rain based on historical data, with 72 mm (2.8 in) average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Duluth in September

Daytime highs in Duluth in September reach 19°C (66°F), with nights around 9°C (48°F). 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 Duluth in September

There are approximately 196 hours of sunshine this month, resulting in mostly clear days.

Wind Speed in Duluth in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.