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
Transition into December marks a drop in the average high-temperature, moving from a cool 51.6°F (10.9°C) in November to a cold 40.6°F (4.8°C). An average temperature of 29.3°F (-1.5°C) is recorded during the nights in December.Humidity
The average relative humidity in December in Brighton, Illinois, 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, during the entire year, the rain falls for 141.9 days and collects up to 27.36" (695mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Brighton, during December, snow falls for 3.9 days and regularly aggregates up to 1.73" (44mm) of snow. In Brighton, Illinois, during the entire year, snow falls for 19.8 days and aggregates up to 7.91" (201mm) of snow.Daylight
December has the shortest days of the year in Brighton, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:48 pm CST.
Sunshine
In December, the average sunshine is 4.9h.UV index
The months with the lowest UV index in Brighton are January, February, November 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 rays for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
Is December cold in Brighton?
What is the average humidity in December in Brighton?
How many days does it rain in December in Brighton?
How many days does it snow in December in Brighton?
What is the month with the shortest days in Brighton?
How many hours of daylight does Brighton have in December?
When are sunrise and sunset in December in Brighton?
How many hours of sunshine does Brighton have in December?
What are the months with the lowest UV index in Brighton?
What is the UV index intensity in December in Brighton?
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 3min
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 5min
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).
Brighton, Illinois, USA
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