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
Sheffield's progression into December includes a drop in the average high-temperature, from a frosty 47.1°F (8.4°C) in November to a wintry 34.7°F (1.5°C). During December nights, Sheffield witnesses a consistent average temperature of 24.1°F (-4.4°C).Humidity
In Sheffield, the average relative humidity in December is 82%.Rainfall
January and December are months with the least rain in Sheffield, Illinois, when the rain falls for 7.9 days and typically aggregates up to 1.42" (36mm) of rain.Snowfall
January through April, October through December are months with snowfall in Sheffield. In December, it is snowing for 7.3 days. Throughout December, 1.97" (50mm) of snow is accumulated. Throughout the year, in Sheffield, there are 37 snowfall days, and 12.91" (328mm) of snow is accumulated.Daylight
The month with the shortest days in Sheffield is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:39 pm CST.
Sunshine
The average sunshine in December is 4.2h.UV index
In Sheffield, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
How cold is it in Sheffield in December?
What is the average humidity in December in Sheffield?
What is the driest month in Sheffield?
How many days does it rain in December in Sheffield?
How much does it snow in Sheffield in December?
What is the month with the shortest days in Sheffield?
What is the average length of the day in December in Sheffield?
When is the sunrise / sunset in December in Sheffield?
How many hours of sunshine does Sheffield have in December?
What is the UV index intensity in December in Sheffield?
Average temperature in December
Sheffield, IL
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in December
Sheffield, 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 (29.91"Hg).
Average wind speed in December
Sheffield, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Sheffield, IL
- Average humidity in December: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Sheffield, IL
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and December (1.42").
Average rainfall days in December
Sheffield, IL
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in December
Sheffield, IL
- Average snowfall in December: 1.97"
The month with the highest snowfall is January (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Sheffield, IL
- Average snowfall days in December: 7.3 days
The month with the highest number of snowfall days is January (11.4 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
Sheffield, IL
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Sheffield, IL
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (10.2 days).
Average UV index in December
Sheffield, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Sheffield, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Sheffield, 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).
Sheffield, Illinois, USA
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