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
The transition into December in Pearl City, Illinois, is accompanied by a temperature decrease, with the average high-temperature shifting from a frosty 43.9°F (6.6°C) in November to a freezing cold 31.6°F (-0.2°C). Throughout the month of December, Pearl City witnesses an average low-temperature of 21.4°F (-5.9°C).Humidity
In December, the average relative humidity in Pearl City is 83%.Rainfall
In Pearl City, in December, it is raining for 7.4 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, in Pearl City, there are 145.9 rainfall days, and 22.8" (579mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In December, in Pearl City, it is snowing for 11.3 days. Throughout December, 2.52" (64mm) of snow is accumulated. Throughout the year, in Pearl City, there are 50.1 snowfall days, and 13.62" (346mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:09 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:37 pm CST.
Sunshine
The average sunshine in December in Pearl City is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 suggests these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Always opt for UVA and UVB-resistant sunglasses on radiant days. 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
How cold is December in Pearl City?
What is the average humidity in December in Pearl City?
How much does it rain in Pearl City in December?
How much does it snow in Pearl City in December?
What is the month with the shortest days in Pearl City?
What is the average length of the day in December in Pearl City?
When is the sunrise / sunset in December in Pearl City?
How long on average sun shines in December in Pearl City?
What are the months with the lowest UV index in Pearl City?
How high is the UV index in December in Pearl City?
Average temperature in December
Pearl City, IL
- Average high temperature in December: 31.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in December: 21.4°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in December
Pearl City, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Pearl City, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Pearl City, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in December
Pearl City, IL
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Pearl City, IL
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in December
Pearl City, IL
- Average snowfall in December: 2.52"
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Pearl City, IL
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Pearl City, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Pearl City, IL
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in December
Pearl City, IL
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Pearl City, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in December
Pearl City, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Pearl City, Illinois, USA
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