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
As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a frosty 45.3°F (7.4°C) to a wintry 32.9°F (0.5°C). Hillcrest encounters an average low-temperature of 22.8°F (-5.1°C) during December nights.Humidity
In December, the average relative humidity is 83%.Rainfall
In Hillcrest, in December, it is raining for 6.2 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 124.5 rainfall days, and 14.49" (368mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Hillcrest, in December, snow falls for 7.7 days, with typically accumulated 0.87" (22mm) of snow. In Hillcrest, Illinois, during the entire year, snow falls for 37.1 days and aggregates up to 6.14" (156mm) of snow.Daylight
The month with the shortest days in Hillcrest is December, with an average of 9h and 12min of daylight.On the first day of December in Hillcrest, sunrise is at 7:05 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:35 pm CST.
Sunshine
In December, the average sunshine in Hillcrest, Illinois, is 3.9h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Hillcrest in December?
What is the average humidity in December in Hillcrest?
How many days does it rain in December in Hillcrest?
How many days does it snow in December in Hillcrest?
What is the month with the shortest days in Hillcrest?
How many hours of daylight does Hillcrest have in December?
What time are sunrise and sunset in December in Hillcrest?
How many hours of sunshine does Hillcrest have in December?
What are the months with the lowest UV index in Hillcrest?
What is the UV index intensity in December in Hillcrest?
Average temperature in December
Hillcrest, IL
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°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 (14.7°F).
Average pressure in December
Hillcrest, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Hillcrest, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Hillcrest, IL
- Average humidity in December: 83%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Hillcrest, IL
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in December
Hillcrest, IL
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Hillcrest, IL
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Hillcrest, IL
- Average snowfall days in December: 7.7 days
The month with the highest number of snowfall days is January (10.3 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
Hillcrest, 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 12min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Hillcrest, IL
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Hillcrest, IL
- 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 and December (UV index 1).
Average cloud cover in December
Hillcrest, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in December
Hillcrest, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Hillcrest, Illinois, USA
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