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
December's arrival comes with a decrease in the average high-temperature, moving from a cool 54.1°F (12.3°C) in November to a chilly 44.6°F (7°C). An average low-temperature of 32.9°F (0.5°C) is noted during the month of December.Humidity
In December, the average relative humidity in Junction is 78%.Rainfall
In Junction, in December, during 10.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Junction, during the entire year, the rain falls for 146.3 days and collects up to 24.96" (634mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Junction, Illinois, in December, during 3.5 snowfall days, 0.63" (16mm) of snow is typically accumulated. Throughout the year, in Junction, Illinois, there are 15.9 snowfall days, and 3.58" (91mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:50 am and sunset at 4:34 pm. On the last day of December, in Junction, sunrise is at 7:08 am and sunset at 4:44 pm CST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index in Junction are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Junction?
What is the average humidity in December in Junction?
How much does it rain in Junction in December?
How much does it snow in Junction in December?
What is the month with the shortest days in Junction?
What is the average length of the day in December in Junction?
When is the sunrise / sunset in December in Junction?
How many hours of sunshine does Junction have in December?
What is the month with the lowest UV index in Junction?
How high is the UV index in December in Junction?
Average temperature in December
Junction, IL
- Average high temperature in December: 44.6°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Junction, 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 (29.95"Hg).
Average wind speed in December
Junction, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Junction, IL
- Average humidity in December: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Junction, IL
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in December
Junction, IL
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).
Average snowfall in December
Junction, IL
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Junction, IL
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (4.8 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
Junction, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Junction, IL
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in December
Junction, 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
Junction, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in December
Junction, 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).
Junction, Illinois, USA
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