December weather forecastMorrisonville, IL
December
Weather in December
The first month of the winter, December, is also a wintry month in Morrisonville, Illinois, with an average temperature varying between 28.2°F (-2.1°C) and 39.2°F (4°C).Temperature
The move into December indicates a reduction in the average high-temperature, down from November's fresh 50.4°F (10.2°C) to a cold 39.2°F (4°C). Throughout the month of December, Morrisonville expects an average low of 28.2°F (-2.1°C).Humidity
In Morrisonville, Illinois, the average relative humidity in December is 78%.Rainfall
The months with the least rainfall in Morrisonville are September and December Rain falls for 5.1 days and accumulates 0.39" (10mm) of rain.Snowfall
Months with snowfall are January through March, November and December. In Morrisonville, in December, snow falls for 3.9 days, with typically accumulated 0.47" (12mm) of snow. In Morrisonville, during the entire year, snow falls for 17.5 days and aggregates up to 1.97" (50mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:44 pm CST.
Sunshine
In Morrisonville, Illinois, the average sunshine in December is 4.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Morrisonville, IL
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Morrisonville, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Morrisonville, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Morrisonville, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Morrisonville, IL
- Average rainfall in December: 0.39"
The wettest month (with the highest rainfall) is April (0.94").
The driest months (with the least rainfall) are September and December (0.39").
Average rainfall days in December
Morrisonville, IL
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is May (11.5 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Morrisonville, IL
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Morrisonville, IL
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (5.9 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
Morrisonville, IL
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Morrisonville, IL
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is November (22.6 days).
The months with the least sunshine days are May and June (16.5 days).
Average UV index in December
Morrisonville, 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
Morrisonville, IL
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Morrisonville, 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).
