December weather forecastAssumption, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Assumption, Illinois, with temperature in the range of an average high of 38.8°F (3.8°C) and an average low of 28.2°F (-2.1°C).Temperature
During Assumption's transition into December, the average high-temperature lessens, moving from a cool 50.2°F (10.1°C) in November to a wintry 38.8°F (3.8°C). The average temperature during December nights is registered at a freezing cold 28.2°F (-2.1°C).Humidity
In Assumption, the average relative humidity in December is 79%.Rainfall
The months with the least rainfall are February and December Rain falls for 7.7 days and accumulates 1.38" (35mm) of rain.Snowfall
January through March, November and December are months with snowfall in Assumption. In Assumption, in December, during 4.9 snowfall days, 1.5" (38mm) of snow is typically accumulated. In Assumption, during the entire year, snow falls for 23.6 days and aggregates up to 8.54" (217mm) 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 December in Assumption, sunrise is at 6:58 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:42 pm CST.
Sunshine
The average sunshine in December in Assumption is 4.6h.UV index
The months with the lowest UV index in Assumption are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Assumption, IL
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Assumption, 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
Assumption, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in December
Assumption, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Assumption, IL
- Average rainfall in December: 1.38"
The wettest months (with the highest rainfall) are April and May (2.91").
The driest months (with the least rainfall) are February and December (1.38").
Average rainfall days in December
Assumption, IL
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Assumption, IL
- Average snowfall in December: 1.5"
The month with the highest snowfall is February (2.8").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Assumption, IL
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (7.6 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
Assumption, 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 36min
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 6min).
Average sunshine days in December
Assumption, IL
- Average sunshine days in December: 18.3 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in December
Assumption, 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
Assumption, IL
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June and September (Cloud cover 30).
Average visibility in December
Assumption, 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).
