Arlington Heights Weather in October

What's the weather like in Arlington Heights (Illinois) in October 2025?

The climate in Arlington Heights during October can be summarized as mild and reasonably dry.

October is in the fall / autumn in Arlington Heights and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 6°C (43°F) is normal.

Arlington Heights weather averages (imperial / metric)
Daytime temperature 17.2°C 62.9°F
Nightly temperature 5.9°C 42.5°F
Average temperature 11.5°C 52.7°F
Daily sunshine 6.7 hrs
Avg rainfall 64 mm 2.5 ins
Rainy days 9 days
Sea temperature 14°C 57.2°F
Humidity 70%
Windspeed 17.3kph 11 mph

On average October is the 3rd driest month of the year in Arlington Heights with around 64mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.7 hours of sunshine per day.

October temperatures in Arlington Heights

Arlington Heights average temperature in October

October rainfall

Arlington Heights average rain in October

October hourly sunshine

Arlington Heights average rain in October

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 Arlington Heights in October 2025.

Other monthly averages

Best places to visit in October

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Arlington Heights weather stats

Arlington Heights 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 Arlington Heights (42.08836, -87.98063) Arlington Heights map pin © Google

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