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
The beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 44.6°F (7°C) in November to a wintry 32.7°F (0.4°C). During December, Holiday Hills sees a mean low-temperature of 22.8°F (-5.1°C).Humidity
In Holiday Hills, the average relative humidity in December is 82%.Rainfall
December is the month with the least rainfall in Holiday Hills, Illinois. Rain falls for 7.9 days and accumulates 1.34" (34mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Holiday Hills, in December, during 10.3 snowfall days, 2.6" (66mm) of snow is typically accumulated. Throughout the year, in Holiday Hills, there are 49 snowfall days, and 16.5" (419mm) of snow is accumulated.Daylight
December has the shortest days of the year in Holiday Hills, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:30 pm CST.
Sunshine
The average sunshine in December is 4h.UV index
The months with the lowest UV index in Holiday Hills, Illinois, are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 1 during December, leads to the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How cold is it in Holiday Hills in December?
What is the average humidity in December in Holiday Hills?
What is the driest month in Holiday Hills?
How much does it rain in Holiday Hills in December?
How many days does it snow in December in Holiday Hills?
What is the month with the shortest days in Holiday Hills?
How many hours of daylight does Holiday Hills have in December?
What time are sunrise and sunset in December in Holiday Hills?
How many hours of sunshine does Holiday Hills have in December?
When is the lowest UV index in Holiday Hills?
What is the UV index reading in December in Holiday Hills?
Average temperature in December
Holiday Hills, IL
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in December
Holiday Hills, 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
Holiday Hills, IL
- Average wind speed in December: 9.3mph
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
Holiday Hills, IL
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Holiday Hills, IL
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.34").
Average rainfall days in December
Holiday Hills, IL
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Holiday Hills, IL
- Average snowfall in December: 2.6"
The month with the highest snowfall is January (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Holiday Hills, IL
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Holiday Hills, IL
- 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: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Holiday Hills, IL
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is June (10.2 days).
Average UV index in December
Holiday Hills, IL
- Average UV index in December: 1
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Holiday Hills, IL
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in December
Holiday Hills, 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).
Holiday Hills, Illinois, USA
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