Weather in December
December marks the onset of winter in LaSalle, Illinois, with a stark contrast to the weather conditions of November. Temperatures steadily dwindle, ranging from 18°F (-7.8°C) to 34°F (1.1°C), embodying the cold essence of the winter season. Days shorten further to just 9.2 hours, lending to twinkling night skies above the tranquil winter landscape. The winter solstice in December brings the shortest day of the year, setting the stage for an increase in daylight as the New Year begins.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:36 pm CST.
Temperature
The shift into December brings a noticeable decrease in the average high-temperature, falling from a frosty 48.9°F (9.4°C) in November to a wintry 34°F (1.1°C). Throughout the month of December, LaSalle sees a steady low-temperature average of 18°F (-7.8°C).Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:36 pm CST.
Updated: Jun 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
In December, in LaSalle, the average high-temperature is 34°F (1.1°C), and the average low-temperature is 18°F (-7.8°C).
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
How many hours of daylight does LaSalle have in December?
In December, the average day length is 9h and 15min.
What time are sunrise and sunset in December?
In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:36 pm CST.
Average temperature in December
LaSalle, IL
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (85°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average daylight in December
LaSalle, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
LaSalle, Illinois, USA
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