December weather forecastSeaton, IL
December
Weather in December
December, the first month of the winter in Seaton, is also a wintry month, with an average temperature ranging between max 35.1°F (1.7°C) and min 24.4°F (-4.2°C).Temperature
December brings a drop in Seaton's average high-temperature, falling from a chilly 47.3°F (8.5°C) in November to an icy 35.1°F (1.7°C). Throughout the December nights, Seaton encounters a low-temperature of 24.4°F (-4.2°C).Humidity
The average relative humidity in December in Seaton, Illinois, is 81%.Rainfall
December is the month with the least rainfall. Rain falls for 5.5 days and accumulates 0.67" (17mm) of precipitation.Snowfall
Months with snowfall in Seaton, Illinois, are January through April, October through December. In Seaton, in December, during 6.1 snowfall days, 0.98" (25mm) of snow is typically accumulated. In Seaton, during the entire year, snow falls for 26.3 days and aggregates up to 7.64" (194mm) 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 in Seaton, sunrise is at 7:09 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:44 pm CST.
Sunshine
In December, the average sunshine is 4.5h.UV index
In Seaton, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 2 during December leads to these advisories:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Seaton, IL
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Seaton, 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 (29.9"Hg).
Average wind speed in December
Seaton, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Seaton, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Seaton, IL
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in December
Seaton, IL
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in December
Seaton, IL
- Average snowfall in December: 0.98"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Seaton, IL
- Average snowfall days in December: 6.1 days
The month with the highest number of snowfall days is January (7.8 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
Seaton, IL
- Average daylight in December: 9h and 18min
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 30min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Seaton, IL
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in December
Seaton, 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
Seaton, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in December
Seaton, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
