December weather forecastLisle, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Lisle, Illinois, with an average temperature fluctuating between 24.6°F (-4.1°C) and 34.5°F (1.4°C).Temperature
A subtle decrease in the average high-temperature marks December, falling from November's frosty 45.7°F (7.6°C) to a wintry 34.5°F (1.4°C). Throughout December, Lisle witnesses a consistent average low-temperature of 24.6°F (-4.1°C).Humidity
The average relative humidity in December is 81%.Rainfall
The month with the least rainfall is December, when the rain falls for 7.5 days and typically collects 1.1" (28mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Lisle, during December, snow falls for 9.9 days and regularly aggregates up to 2.01" (51mm) of snow. In Lisle, during the entire year, snow falls for 44.8 days and aggregates up to 12.32" (313mm) of snow.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 7:00 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:31 pm CST.
Sunshine
In December, the average sunshine in Lisle is 4.2h.UV index
In Lisle, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lisle, IL
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Lisle, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Lisle, IL
- Average wind speed in December: 9mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Lisle, IL
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Lisle, IL
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in December
Lisle, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in December
Lisle, IL
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lisle, IL
- Average snowfall days in December: 9.9 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lisle, IL
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Lisle, IL
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in December
Lisle, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Lisle, IL
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Lisle, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
