December weather forecastBrighton, IL
December
Weather in December
The first month of the winter, December, is also a wintry month in Brighton, Illinois, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 40.6°F (4.8°C).Temperature
In Brighton, entering December brings a temperature decrement, reducing from November's fresh 51.6°F (10.9°C) to an icy 40.6°F (4.8°C). Throughout December, Brighton anticipates an average low-temperature of 29.3°F (-1.5°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Brighton, during December, the rain falls for 8.1 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Brighton, Illinois, during the entire year, the rain falls for 141.9 days and collects up to 27.36" (695mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Brighton, in December, snow falls for 3.9 days, with typically accumulated 1.73" (44mm) of snow. Throughout the year, there are 19.8 snowfall days, and 7.91" (201mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:48 pm CST.
Sunshine
In Brighton, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 2 during December leads to these instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Brighton, IL
- Average high temperature in December: 40.6°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Brighton, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Brighton, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Brighton, IL
- Average humidity in December: 77%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Brighton, IL
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Brighton, IL
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in December
Brighton, IL
- Average snowfall in December: 1.73"
The month with the highest snowfall is February (2.48").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Brighton, IL
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (6.2 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
Brighton, IL
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Brighton, IL
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (12.1 days).
Average UV index in December
Brighton, 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, November and December (UV index 2).
Average cloud cover in December
Brighton, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in December
Brighton, 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).
