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
Lockport's weather changes with the onset of December, slightly falling from a chilly 46.9°F (8.3°C) in November to an icy 34.9°F (1.6°C). In Lockport, the average nighttime temperature during December is a freezing cold 25°F (-3.9°C).Humidity
In Lockport, Illinois, the average relative humidity in December is 81%.Rainfall
In Lockport, Illinois, in December, it is raining for 4.5 days, with typically 0.51" (13mm) of accumulated precipitation. In Lockport, Illinois, during the entire year, the rain falls for 103.8 days and collects up to 10.08" (256mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Lockport. In Lockport, Illinois, in December, during 6.3 snowfall days, 0.39" (10mm) of snow is typically accumulated. Throughout the year, in Lockport, there are 30.8 snowfall days, and 4.02" (102mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:00 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:32 pm CST.
Sunshine
In Lockport, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Lockport in December?
What is the average humidity in December in Lockport?
How much does it rain in Lockport in December?
How much does it snow in Lockport in December?
What is the month with the shortest days in Lockport?
How many hours of daylight does Lockport have in December?
What time are sunrise and sunset in December in Lockport?
How many hours of sunshine does Lockport have in December?
What are the months with the lowest UV index in Lockport?
What is the UV index intensity in December in Lockport?
Average temperature in December
Lockport, IL
- Average high temperature in December: 34.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in December: 25°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in December
Lockport, 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
Lockport, 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
Lockport, IL
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Lockport, IL
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Lockport, IL
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in December
Lockport, IL
- Average snowfall in December: 0.39"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Lockport, IL
- Average snowfall days in December: 6.3 days
The month with the highest number of snowfall days is January (9 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
Lockport, 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 1min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Lockport, IL
- Average sunshine days in December: 22.3 days
The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in December
Lockport, 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
Lockport, 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 32).
Average visibility in December
Lockport, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Lockport, Illinois, USA
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