Superior Weather in September

Superior in September sees pleasant temperatures, with highs around 20°C (68°F) and overnight lows of 9°C (48°F). Rainfall is fairly high at around 77 mm (3 in) on average, so pack waterproofs just in case.

Rainfall in Superior in September

You can typically expect 11 days of rain this month, averaging around 77 mm (3 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Superior in September

Superior in September is worth a visit. The temperature is perfect, with 20°C (68°F) during the day and 9°C (48°F) at night. Experience the summer season in September. The difference between afternoon and evening temperatures is usually noticeable. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Superior in September

The days are predominantly sunny, with an estimated total of around 196 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Superior in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Superior's climate page.

Superior Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 37%  

Precipitation 77 mm (3 in)  

Rainy days 11 days  

Humidity 76% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 196 hours *  

Percentage Sunshine 52% *  

* Data from: Duluth, the United States of America (13 KM, 8 Miles).

What to Wear in Superior in September

For Superior in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Superior in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Superior's climate page.

More climate data for Superior

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Superior climate overview or explore weather in the United States of America.