Rock Island Weather in December

What's the weather like in Rock Island (Illinois) in December 2024?

The climate in Rock Island during December can be summarized as cold and reasonably dry.

December is in the winter in Rock Island and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing 1°C (34°F), whilst at night -8°C (18°F) is normal.

Rock Island weather averages (imperial / metric)
Daytime temperature 1.1°C 33.9°F
Nightly temperature -7.9°C 17.9°F
Average temperature -3.4°C 25.9°F
Daily sunshine 4.3 hrs
Avg rainfall 48 mm 1.9 ins
Rainy days 10 days
Sea temperature 9°C 48.2°F
Humidity 75%
Windspeed 18.4kph 11 mph

On average December is the 3rd driest month of the year in Rock Island with around 48mm 1.9 inches of rain making it a reasonably dry 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 4.3 hours of sunshine per day.

December temperatures in Rock Island

Rock Island average temperature in December

December rainfall

Rock Island average rain in December

December hourly sunshine

Rock Island average rain in December

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 Rock Island in December 2024.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Rock Island weather stats

Rock Island weather statistics
Hottest month: July 29.9°C 85.8°F
Driest month: February 26mm 1ins
Sunniest month: July 10.6hrs
Coldest month: January -2.3°C 27.9°F
Wettest month: July 114mm 4.5ins
Map showing location of Rock Island (41.50948, -90.57875) Rock Island map pin © Google

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