December weather forecastAlpha, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Alpha, Illinois, with an average temperature ranging between min 24.1°F (-4.4°C) and max 34.7°F (1.5°C).Temperature
With December's arrival, Alpha's weather changes as the average high-temperature falls from a chilly 46.9°F (8.3°C) in November to a cold 34.7°F (1.5°C). December nights observe an average temperature dip to a subzero cold 24.1°F (-4.4°C).Humidity
The average relative humidity in December is 81%.Rainfall
The month with the least rainfall in Alpha is December, when the rain falls for 7.4 days and typically collects 1.26" (32mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Alpha. In Alpha, in December, snow falls for 7.5 days, with typically accumulated 1.97" (50mm) of snow. Throughout the year, in Alpha, there are 36.5 snowfall days, and 13.5" (343mm) of snow is accumulated.Daylight
December has the shortest days of the year in Alpha, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:42 pm CST.
Sunshine
In Alpha, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index in Alpha, Illinois, are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 1 during December leads to these instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. 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
Alpha, IL
- Average high temperature in December: 34.7°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 (28.4°F).
- Average low temperature in December: 24.1°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 (16.2°F).
Average pressure in December
Alpha, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Alpha, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in December
Alpha, IL
- Average humidity in December: 81%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Alpha, IL
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is December (1.26").
Average rainfall days in December
Alpha, IL
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (5 days).
Average snowfall in December
Alpha, IL
- Average snowfall in December: 1.97"
The month with the highest snowfall is January (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Alpha, IL
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Alpha, 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 18min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Alpha, IL
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in December
Alpha, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Alpha, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Alpha, 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).
