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
During Forsyth's transition into December, the average high-temperature lessens, moving from a frosty 49.3°F (9.6°C) in November to an icy 38.1°F (3.4°C). Forsyth observes an average nighttime low-temperature of 27.5°F (-2.5°C) during the month of December.Humidity
In Forsyth, the average relative humidity in December is 79%.Rainfall
The month with the least rainfall in Forsyth is December, when the rain falls for 8.1 days and typically collects 1.06" (27mm) of precipitation.Snowfall
Months with snowfall in Forsyth, Illinois, are January through April, November and December. In Forsyth, during December, snow falls for 7.1 days and regularly aggregates up to 1.14" (29mm) of snow. Throughout the year, in Forsyth, there are 30.3 snowfall days, and 6.89" (175mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Forsyth.On the first day of the month, sunrise is at 6:58 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:40 pm CST.
Sunshine
The average sunshine in December is 4.4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 in December translates into this advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
Is December cold in Forsyth?
What is the average humidity in December in Forsyth?
What is the driest month in Forsyth?
How much does it rain in Forsyth in December?
How much does it snow in Forsyth in December?
What is the month with the shortest days in Forsyth?
How many hours of daylight does Forsyth have in December?
When are sunrise and sunset in December in Forsyth?
How long on average sun shines in December in Forsyth?
What is the month with the lowest UV index in Forsyth?
What is the UV index intensity in December in Forsyth?
Average temperature in December
Forsyth, IL
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Forsyth, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Forsyth, IL
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January, February and April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Forsyth, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Forsyth, IL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is December (1.06").
Average rainfall days in December
Forsyth, IL
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in December
Forsyth, IL
- Average snowfall in December: 1.14"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Forsyth, IL
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Forsyth, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Forsyth, IL
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in December
Forsyth, IL
- Average UV index in December: 2
The months with the highest UV index are 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
Forsyth, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Forsyth, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Forsyth, Illinois, USA
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