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
A shift in the average high-temperature occurs in December, reducing from a frosty 44.6°F (7°C) in November to a wintry 32.7°F (0.4°C). Throughout December, Bull Valley's nights cool down to an average of 22.8°F (-5.1°C).Humidity
In Bull Valley, Illinois, the average relative humidity in December is 82%.Rainfall
December is the month with the least rainfall in Bull Valley, Illinois. Rain falls for 7.9 days and accumulates 1.34" (34mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Bull Valley, in December, snow falls for 10.3 days, with typically accumulated 2.6" (66mm) of snow. Throughout the year, in Bull Valley, there are 49 snowfall days, and 16.5" (419mm) of snow is accumulated.Daylight
December has the shortest days of the year in Bull Valley, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:21 pm. On the last day of December, in Bull Valley, sunrise is at 7:22 am and sunset at 4:31 pm CST.
Sunshine
The average sunshine in December is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Bull Valley. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 1 during December leads to these instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is it in Bull Valley in December?
What is the average humidity in December in Bull Valley?
What is the driest month in Bull Valley?
How much does it rain in Bull Valley in December?
How much does it snow in Bull Valley in December?
What is the month with the shortest days in Bull Valley?
What is the average length of the day in December in Bull Valley?
What time are sunrise and sunset in December in Bull Valley?
How long on average sun shines in December in Bull Valley?
What are the months with the lowest UV index in Bull Valley?
What is the UV index reading in December in Bull Valley?
Average temperature in December
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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
Bull Valley, 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).
Bull Valley, Illinois, USA
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