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 December's arrival, Sugar Island sees a decrease in average high-temperatures, moving from a chilly 47.7°F (8.7°C) in November to a wintry 36.5°F (2.5°C). In Sugar Island, the expected average low-temperature for December is a freezing cold 26.1°F (-3.3°C).Humidity
In Sugar Island, the average relative humidity in December is 81%.Rainfall
January, February and December are months with the least rain in Sugar Island when the rain falls for 6.8 days and typically aggregates up to 1.06" (27mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In Sugar Island, in December, snow falls for 7.7 days, with typically accumulated 1.34" (34mm) of snow. In Sugar Island, during the entire year, snow falls for 35.3 days and aggregates up to 9.37" (238mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:33 pm CST.
Sunshine
In Sugar Island, the average sunshine in December is 4.3h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is it in Sugar Island in December?
What is the average humidity in December in Sugar Island?
What is the driest month in Sugar Island?
How much does it rain in Sugar Island in December?
How much does it snow in Sugar Island in December?
What is the month with the shortest days in Sugar Island?
What is the average length of the day in December in Sugar Island?
What time are sunrise and sunset in December in Sugar Island?
How long on average sun shines in December in Sugar Island?
What is the month with the lowest UV index in Sugar Island?
How high is the UV index in December in Sugar Island?
Average temperature in December
Sugar Island, IL
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Sugar Island, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Sugar Island, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Sugar Island, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Sugar Island, IL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are January, February and December (1.06").
Average rainfall days in December
Sugar Island, IL
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Sugar Island, IL
- Average snowfall in December: 1.34"
The month with the highest snowfall is February (2.48").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Sugar Island, IL
- Average snowfall days in December: 7.7 days
The month with the highest number of snowfall days is January (10.8 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
Sugar Island, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Sugar Island, IL
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10 days).
Average UV index in December
Sugar Island, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Sugar Island, IL
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in December
Sugar Island, 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).
Sugar Island, Illinois, USA
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