December weather forecastTolono, IL
December
Weather in December
December, the first month of the winter in Tolono, is also a wintry month, with an average temperature ranging between min 27.7°F (-2.4°C) and max 37.8°F (3.2°C).Temperature
Tolono's weather changes with the onset of December, slightly falling from a frosty 49.1°F (9.5°C) in November to a wintry 37.8°F (3.2°C). During the December nights, an average temperature of 27.7°F (-2.4°C) is observed.Humidity
The average relative humidity in December is 80%.Rainfall
In December, in Tolono, the rain falls for 8.1 days. Throughout December, 1.3" (33mm) of precipitation is accumulated. Throughout the year, in Tolono, there are 143.2 rainfall days, and 23.11" (587mm) of precipitation is accumulated.Snowfall
Months with snowfall in Tolono are January through April, November and December. In Tolono, Illinois, in December, snow falls for 6.8 days, with typically accumulated 1.69" (43mm) of snow. Throughout the year, there are 30.6 snowfall days, and 8.54" (217mm) of snow is accumulated.Daylight
December has the shortest days of the year in Tolono, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:38 pm CST.
Sunshine
In Tolono, Illinois, the average sunshine in December is 4.5h.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 estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Boost your sun resistance with garments that are densely woven yet spacious. 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
Tolono, IL
- Average high temperature in December: 37.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Tolono, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Tolono, IL
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.4mph).
Average humidity in December
Tolono, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Tolono, IL
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in December
Tolono, IL
- Average rainfall days in December: 8.1 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in December
Tolono, IL
- Average snowfall in December: 1.69"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Tolono, IL
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (9.4 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
Tolono, IL
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Tolono, IL
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Tolono, 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
Tolono, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in December
Tolono, 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).
