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
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
How cold is December in Forest City?
What is the average humidity in December in Forest City?
How many days does it rain in December in Forest City?
How much does it snow in Forest City in December?
What is the month with the shortest days in Forest City?
How many hours of daylight does Forest City have in December?
When are sunrise and sunset in December in Forest City?
How long on average sun shines in December in Forest City?
What are the months with the lowest UV index in Forest City?
What is the UV index reading in December in Forest City?
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 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 18min).
- Average sunshine in December: 4h and 3min
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).
Forest City, Illinois, USA
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