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 excellent 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.