Willowbrook Weather in September

Willowbrook in September sees high daytime temperatures of 25°C (77°F) and nighttime lows of 13°C (55°F). Rainfall is fairly high this month at around 85 mm (3.3 in), so pack a rain jacket to stay dry.

Rainfall in Willowbrook in September

Records from the past 30 years suggest around 10 days of rain, with 85 mm (3.3 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Willowbrook in September

September tends to be one of the perfect months in Willowbrook, with 25°C (77°F) in the afternoon and 13°C (55°F) overnight. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows of 13°C (55°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Willowbrook in September

The city usually sees around 226 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Willowbrook 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.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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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 Willowbrook's climate page.

Willowbrook Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 33%  

Precipitation 85 mm (3.3 in)  

Rainy days 10 days  

Humidity 71% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (23 KM, 14 Miles).

What to Wear in Willowbrook in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Willowbrook in September

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

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 Willowbrook's climate page.

More climate data for Willowbrook

Temperature Rainfall Sunshine Humidity Wind Speed

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