Mount Prospect Weather in September

September in Mount Prospect typically sees daytime highs of 24°C (75°F) and nighttime lows of 13°C (55°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Mount Prospect in September

Historically, the month has about 9 days of rain, averaging 99 mm (3.9 in) in total. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Mount Prospect in September

September tends to be one of the perfect months in Mount Prospect, with 24°C (75°F) in the afternoon and 13°C (55°F) overnight. This kind of day-to-night contrast is typical for this time of year. 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 Mount Prospect in September

The month enjoys around 226 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Mount Prospect 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 your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Mount Prospect.

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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 Mount Prospect's climate page.

Mount Prospect Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 30%  

Precipitation 99 mm (3.9 in)  

Rainy days 9 days  

Humidity 71% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (9 KM, 6 Miles).

What to Wear in Mount Prospect 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Mount Prospect 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 Mount Prospect's climate page.

More climate data for Mount Prospect

Temperature Rainfall Sunshine Humidity Wind Speed

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