Northbrook Weather in September

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

The climate in Northbrook during September can be summarized as warm and a little damp.

September is in the fall / autumn in Northbrook and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (74°F), whilst at night 13°C (55°F) is normal.

Northbrook weather averages (imperial / metric)
Daytime temperature 23.5°C 74.3°F
Nightly temperature 12.5°C 54.5°F
Average temperature 18°C 64.4°F
Daily sunshine 8.1 hrs
Avg rainfall 84 mm 3.3 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 6th wettest month of the year in Northbrook with around 84mm 3.3 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 Northbrook

Northbrook average temperature in September

September rainfall

Northbrook average rain in September

September hourly sunshine

Northbrook 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 Northbrook 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

Northbrook weather stats

Northbrook weather statistics
Hottest month: July 28.2°C 82.8°F
Driest month: February 39mm 1.5ins
Sunniest month: July 11.1hrs
Coldest month: January -1.5°C 29.3°F
Wettest month: July 101mm 4ins
Map showing location of Northbrook (42.12753, -87.82895) Northbrook map pin © Google

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