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
In the transition to December, Tunnel Hill observes a drop in the average high-temperature, moving from a fresh 54.5°F (12.5°C) in November to a chilly 44.8°F (7.1°C). During December, Tunnel Hill's temperature falls to a steady low-temperature average of 32.7°F (0.4°C).Humidity
The average relative humidity in December in Tunnel Hill 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. Throughout the year, in Tunnel Hill, there are 118.3 rainfall days, and 13.03" (331mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In December, in Tunnel Hill, Illinois, it is snowing for 1.9 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, in Tunnel Hill, there are 11 snowfall days, and 1.57" (40mm) of snow is accumulated.Daylight
The month with the shortest days in Tunnel Hill is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:51 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:09 am and sunset at 4:47 pm CST.
Sunshine
In Tunnel Hill, the average sunshine in December is 4.8h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What are December temperatures in Tunnel Hill?
What is the average humidity in December in Tunnel Hill?
How many days does it rain in December in Tunnel Hill?
How many days does it snow in December in Tunnel Hill?
What is the month with the shortest days in Tunnel Hill?
What is the average length of the day in December in Tunnel Hill?
When is the sunrise / sunset in December in Tunnel Hill?
How long on average sun shines in December in Tunnel Hill?
When is the lowest UV index in Tunnel Hill?
How high is the UV index in December in Tunnel Hill?
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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