December weather forecastForest City, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Forest City, Illinois, with an average temperature fluctuating between 26.4°F (-3.1°C) and 37.2°F (2.9°C).Temperature
With the onset of December, Forest City experiences a modest temperature adjustment, with the average high-temperature receding from a chilly 49.3°F (9.6°C) in November to a wintry 37.2°F (2.9°C). December witnesses an average nighttime temperature of 26.4°F (-3.1°C) in Forest City, Illinois.Humidity
In December, the average relative humidity is 79%.Rainfall
In Forest City, during December, the rain falls for 8.9 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Forest City, during the entire year, the rain falls for 162.3 days and collects up to 32.72" (831mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Forest City, during December, snow falls for 6.9 days and regularly aggregates up to 2.01" (51mm) of snow. Throughout the year, there are 35.3 snowfall days, and 13.35" (339mm) of snow is accumulated.Daylight
The month with the shortest days in Forest City is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:03 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:43 pm CST.
Sunshine
In December, the average sunshine in Forest City is 4.5h.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 of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Forest City, IL
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Forest City, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Forest City, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Forest City, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Forest City, IL
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in December
Forest City, IL
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in December
Forest City, IL
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (4.25").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Forest City, IL
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (11.3 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
Forest City, IL
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 4h and 30min
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 6min).
Average sunshine days in December
Forest City, IL
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is July (8.5 days).
Average UV index in December
Forest City, 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
Forest City, IL
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Forest City, 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).
