Jonesboro Weather in September

What's the weather like in Jonesboro (Illinois) in September 2025?

The climate in Jonesboro during September can be summarized as warm, humid and a little damp.

September is in the fall / autumn in Jonesboro and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 15°C (59°F) is normal.

Jonesboro weather averages (imperial / metric)
Daytime temperature 26.9°C 80.4°F
Nightly temperature 14.7°C 58.5°F
Average temperature 20.8°C 69.4°F
Daily sunshine 8.7 hrs
Avg rainfall 88 mm 3.4 ins
Rainy days 8 days
Sea temperature 22.2°C 71.9°F
Humidity 72%
Windspeed 12.6kph 8 mph

On average September is the 4th driest month of the year in Jonesboro with around 88mm 3.4 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.7 hours of sunshine per day.

September temperatures in Jonesboro

Jonesboro average temperature in September

September rainfall

Jonesboro average rain in September

September hourly sunshine

Jonesboro 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 Jonesboro in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Jonesboro weather stats

Jonesboro weather statistics
Hottest month: July 31.4°C 88.5°F
Driest month: October 76mm 3ins
Sunniest month: July 11hrs
Coldest month: January 4.4°C 39.9°F
Wettest month: May 127mm 5ins
Map showing location of Jonesboro (37.45172, -89.26814) Jonesboro map pin © Google

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