Harrisburg Weather in December

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

The climate in Harrisburg during December can be summarized as cool and damp.

December is in the winter in Harrisburg and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cold 7°C (45°F), whilst at night -3°C (27°F) is normal.

Harrisburg weather averages (imperial / metric)
Daytime temperature 7.4°C 45.2°F
Nightly temperature -2.8°C 27.1°F
Average temperature 2.3°C 36.1°F
Daily sunshine 4.5 hrs
Avg rainfall 103 mm 4.1 ins
Rainy days 10 days
Sea temperature 12.2°C 54°F
Humidity 74%
Windspeed 16.6kph 10 mph

On average December is the 4th wettest month of the year in Harrisburg with around 103mm 4.1 inches of rain making it a 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 4.5 hours of sunshine per day.

December temperatures in Harrisburg

Harrisburg average temperature in December

December rainfall

Harrisburg average rain in December

December hourly sunshine

Harrisburg 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 Harrisburg 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

Harrisburg weather stats

Harrisburg weather statistics
Hottest month: July 32.2°C 90°F
Driest month: October 74mm 2.9ins
Sunniest month: July 11hrs
Coldest month: January 4.7°C 40.5°F
Wettest month: May 129mm 5.1ins
Map showing location of Harrisburg (37.73838, -88.54061) Harrisburg map pin © Google

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