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 commencement of December indicates a shift in the average high-temperature, receding from November's cool 54.5°F (12.5°C) to a chilly 44.8°F (7.1°C). Throughout December, Tunnel Hill experiences a low-temperature average of 32.7°F (0.4°C).Humidity
In Tunnel Hill, the average relative humidity in December is 78%.Rainfall
In Tunnel Hill, during December, the rain falls for 7.3 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Tunnel Hill, during the entire year, the rain falls for 118.3 days and collects up to 13.03" (331mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Tunnel Hill, in December, during 1.9 snowfall days, 0.12" (3mm) of snow is typically accumulated. In Tunnel Hill, during the entire year, snow falls for 11 days and aggregates up to 1.57" (40mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 6:51 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:47 pm CST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 in December translates into this advice:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures 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 Tunnel Hill?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Tunnel Hill have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Tunnel Hill, IL
- Average high temperature in December: 44.8°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in December: 32.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Tunnel Hill, IL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Tunnel Hill, IL
- Average wind speed in December: 8.5mph
The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Tunnel Hill, IL
- Average humidity in December: 78%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Tunnel Hill, IL
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in December
Tunnel Hill, IL
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).
Average snowfall in December
Tunnel Hill, IL
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Tunnel Hill, IL
- Average snowfall days in December: 1.9 days
The month with the highest number of snowfall days is January (3.3 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
Tunnel Hill, IL
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in December
Tunnel Hill, IL
- Average sunshine days in December: 21.2 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in December
Tunnel Hill, IL
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Tunnel Hill, IL
- Average cloud cover in December: 49
The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in December
Tunnel Hill, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Tunnel Hill, Illinois, USA
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