Mount Prospect Weather in September

What's the weather like in Mount Prospect (Illinois) in September 2024?

The climate in Mount Prospect during September can be summarized as mild and a little damp.

September is in the fall / autumn in Mount Prospect and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (74°F), whilst at night 12°C (54°F) is normal.

Mount Prospect weather averages (imperial / metric)
Daytime temperature 23.6°C 74.4°F
Nightly temperature 12.3°C 54.1°F
Average temperature 17.9°C 64.2°F
Daily sunshine 8.1 hrs
Avg rainfall 88 mm 3.5 ins
Rainy days 10 days
Sea temperature 19.6°C 67.3°F
Humidity 72%
Windspeed 15.5kph 10 mph

On average September is the 5th wettest month of the year in Mount Prospect with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.1 hours of sunshine per day.

September temperatures in Mount Prospect

Mount Prospect average temperature in September

September rainfall

Mount Prospect average rain in September

September hourly sunshine

Mount Prospect average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Mount Prospect in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Mount Prospect weather stats

Mount Prospect weather statistics
Hottest month: July 28.3°C 82.9°F
Driest month: February 37mm 1.5ins
Sunniest month: July 11hrs
Coldest month: January -2°C 28.4°F
Wettest month: July 104mm 4.1ins
Map showing location of Mount Prospect (42.06642, -87.93729) Mount Prospect map pin © Google

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