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
In December, the average high-temperature decreases from a chilly 43.3°F (6.3°C) in November to a wintry 33.3°F (0.7°C). In December, the recorded average low-temperature is a freezing cold 23.5°F (-4.7°C).Humidity
In Upper Lisle, the average relative humidity in December is 87%.Rainfall
In Upper Lisle, in December, it is raining for 11.8 days, with typically 2.68" (68mm) of accumulated precipitation. Throughout the year, there are 175.2 rainfall days, and 33.15" (842mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 16.1 days. Throughout December, 7.64" (194mm) of snow is accumulated. Throughout the year, there are 84.3 snowfall days, and 40.28" (1023mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:14 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:41 pm EST.
Sunshine
In December, the average sunshine is 2.8h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December in Upper Lisle?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Upper Lisle, NY
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in December: 23.5°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in December
Upper Lisle, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Upper Lisle, NY
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Upper Lisle, NY
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, May, June and July (80%).
Average rainfall in December
Upper Lisle, NY
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (3.27").
The driest months (with the least rainfall) are January and September (2.36").
Average rainfall days in December
Upper Lisle, NY
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in December
Upper Lisle, NY
- Average snowfall in December: 7.64"
The month with the highest snowfall is February (8.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Upper Lisle, NY
- Average snowfall days in December: 16.1 days
The month with the highest number of snowfall days is January (19.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Upper Lisle, NY
- Average daylight in December: 9h and 1min
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 6min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Upper Lisle, NY
- Average sunshine days in December: 7.4 days
The month with the most sunshine days is September (13.7 days).
The month with the least sunshine days is February (4.8 days).
Average UV index in December
Upper Lisle, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Upper Lisle, NY
- Average cloud cover in December: 72
The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in December
Upper Lisle, NY
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Upper Lisle, New York, USA
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