Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Transition into December marks a drop in the average high-temperature, moving from a chilly 46.9°F (8.3°C) in November to a cold 35.1°F (1.7°C). An average low-temperature of 25°F (-3.9°C) is observed in New Lenox during the December nights.Humidity
In New Lenox, Illinois, the average relative humidity in December is 81%.Rainfall
The months with the least rainfall in New Lenox, Illinois, are February and December Rain falls for 7.6 days and accumulates 1.61" (41mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In New Lenox, during December, snow falls for 9 days and regularly aggregates up to 2.44" (62mm) of snow. Throughout the year, there are 42.2 snowfall days, and 14.65" (372mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:22 pm. On the last day of December, in New Lenox, sunrise is at 7:18 am and sunset at 4:32 pm CST.
Sunshine
In December, the average sunshine is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in New Lenox. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 1 in December transforms into this advice:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. When the Sun is at its strongest around midday, find shade and limit exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in New Lenox in December?
What is the average humidity in December in New Lenox?
What is the driest month in New Lenox?
How much does it rain in New Lenox in December?
How many days does it snow in December in New Lenox?
What is the month with the shortest days in New Lenox?
How many hours of daylight does New Lenox have in December?
What time are sunrise and sunset in December in New Lenox?
How many hours of sunshine does New Lenox have in December?
When is the lowest UV index in New Lenox?
What is the UV index reading in December in New Lenox?
Average temperature in December
New Lenox, IL
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in December: 25°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
New Lenox, IL
- Average pressure in December: 30.1"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
New Lenox, IL
- Average wind speed in December: 9.1mph
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
New Lenox, 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
New Lenox, IL
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is May (4.21").
The driest months (with the least rainfall) are February and December (1.61").
Average rainfall days in December
New Lenox, IL
- Average rainfall days in December: 7.6 days
The months with the highest number of rainy days are June and July (17.3 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
New Lenox, IL
- Average snowfall in December: 2.44"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
New Lenox, IL
- Average snowfall days in December: 9 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
New Lenox, 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).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
New Lenox, IL
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in December
New Lenox, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
New Lenox, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
New Lenox, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
New Lenox, Illinois, USA
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