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
Arrival of December comes with a reduction in the average high-temperature, falling from a chilly 47.1°F (8.4°C) in November to a cold 35.6°F (2°C). South Chicago Heights in December anticipates an average nighttime temperature of 25.9°F (-3.4°C).Humidity
In December, the average relative humidity in South Chicago Heights is 81%.Rainfall
In South Chicago Heights, in December, it is raining for 8.5 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, in South Chicago Heights, there are 167.4 rainfall days, and 35" (889mm) of precipitation is accumulated.Snowfall
Months with snowfall in South Chicago Heights, Illinois, are January through April, October through December. In December, it is snowing for 9.8 days. Throughout December, 3.07" (78mm) of snow is accumulated. In South Chicago Heights, Illinois, during the entire year, snow falls for 47.8 days and aggregates up to 20.04" (509mm) of snow.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 6:58 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:30 pm CST.
Sunshine
In South Chicago Heights, the average sunshine in December is 4h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in South Chicago Heights. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 1 during December translates into these guidelines:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is December in South Chicago Heights?
What is the average humidity in December in South Chicago Heights?
How many days does it rain in December in South Chicago Heights?
How many days does it snow in December in South Chicago Heights?
What is the month with the shortest days in South Chicago Heights?
How many hours of daylight does South Chicago Heights have in December?
When are sunrise and sunset in December in South Chicago Heights?
How long on average sun shines in December in South Chicago Heights?
What is the month with the lowest UV index in South Chicago Heights?
What is the UV index intensity in December in South Chicago Heights?
Average temperature in December
South Chicago Heights, IL
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 25.9°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 (18.9°F).
Average pressure in December
South Chicago Heights, 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
South Chicago Heights, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
South Chicago Heights, 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
South Chicago Heights, IL
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in December
South Chicago Heights, IL
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in December
South Chicago Heights, IL
- Average snowfall in December: 3.07"
The month with the highest snowfall is February (5.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
South Chicago Heights, IL
- Average snowfall days in December: 9.8 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Chicago Heights, 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 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
South Chicago Heights, IL
- Average sunshine days in December: 14 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in December
South Chicago Heights, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
South Chicago Heights, 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 33).
Average visibility in December
South Chicago Heights, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
South Chicago Heights, Illinois, USA
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