December weather forecastSaint Francisville, IL
December
Weather in December
December, the first month of the winter in Saint Francisville, is also a wintry month, with an average temperature ranging between min 30.9°F (-0.6°C) and max 42.1°F (5.6°C).Temperature
Saint Francisville's December weather comes with a decrease in average high-temperatures, moving from a cool 52.2°F (11.2°C) in November to a wintry 42.1°F (5.6°C). December is noted for a mean low-temperature of 30.9°F (-0.6°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Saint Francisville, Illinois, during December, the rain falls for 4.9 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 89 rainfall days, and 7.6" (193mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In December, it is snowing for 2.3 days. Throughout December, 0.12" (3mm) of snow is accumulated. In Saint Francisville, during the entire year, snow falls for 13.3 days and aggregates up to 0.91" (23mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:49 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:39 pm CST.
Sunshine
With an average of 4.5h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December translates into the following guidance:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint Francisville, IL
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in December
Saint Francisville, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Saint Francisville, IL
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Saint Francisville, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Saint Francisville, IL
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is April (0.91").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in December
Saint Francisville, IL
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is May (10.8 days).
The month with the least rainy days is December (4.9 days).
Average snowfall in December
Saint Francisville, IL
- Average snowfall in December: 0.12"
The month with the highest snowfall is March (0.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Saint Francisville, IL
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Saint Francisville, IL
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in December
Saint Francisville, IL
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is May (16.9 days).
Average UV index in December
Saint Francisville, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Saint Francisville, IL
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in December
Saint Francisville, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
