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
In December, the meteorological conditions alter, with the average high-temperature shifting from a chilly 47.3°F (8.5°C) in November to a wintry 35.8°F (2.1°C). Lacon experiences an average low-temperature of 25.3°F (-3.7°C) in the month of December.Humidity
In December, the average relative humidity is 81%.Rainfall
In Lacon, in December, it is raining for 7.3 days, with typically 1.69" (43mm) of accumulated precipitation. In Lacon, during the entire year, the rain falls for 148.8 days and collects up to 30.94" (786mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Lacon, in December, during 6.9 snowfall days, 2.13" (54mm) of snow is typically accumulated. Throughout the year, there are 33.3 snowfall days, and 14.33" (364mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:39 pm CST.
Sunshine
In December, the average sunshine is 4.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 1 during December translates into the following guidance:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in Lacon in December?
What is the month with the shortest days in Lacon?
What is the average length of the day in December in Lacon?
When is the sunrise / sunset in December?
How many hours of sunshine does Lacon have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Lacon, IL
- Average high temperature in December: 35.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 25.3°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 (17.4°F).
Average pressure in December
Lacon, 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
Lacon, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Lacon, 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 (72%).
Average rainfall in December
Lacon, IL
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in December
Lacon, IL
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in December
Lacon, IL
- Average snowfall in December: 2.13"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Lacon, IL
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (10.4 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
Lacon, 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 1min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Lacon, IL
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
Lacon, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Lacon, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Lacon, 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).
Lacon, Illinois, USA
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