Prospect Heights Weather in September

Prospect Heights in September averages 24°C (75°F) during the day and 13°C (55°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Prospect Heights in September

You can typically expect 9 days of rain this month, averaging around 97 mm (3.8 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Prospect Heights in September

September tends to be one of the excellent months in Prospect Heights, with 24°C (75°F) in the afternoon and 13°C (55°F) overnight. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Prospect Heights in September

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

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

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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 Prospect Heights's climate page.

Prospect Heights Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 30%  

Precipitation 97 mm (3.8 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 (12 KM, 7 Miles).

What to Wear in Prospect Heights in September

For Prospect Heights 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

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

More climate data for Prospect Heights

Temperature Rainfall Sunshine Humidity Wind Speed

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