Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
A change in temperatures is noted as November gives way to December, with average highs reducing from a cool 52.9°F (11.6°C) to an icy 42.3°F (5.7°C). Aviston, in December, observes a steady average low-temperature of 30.2°F (-1°C).Humidity
In December, the average relative humidity in Aviston is 77%.Rainfall
In Aviston, in December, it is raining for 8.5 days, with typically 1.89" (48mm) of accumulated precipitation. In Aviston, during the entire year, the rain falls for 151.1 days and collects up to 30.43" (773mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Aviston, in December, snow falls for 4.5 days, with typically accumulated 1.46" (37mm) of snow. Throughout the year, there are 22.4 snowfall days, and 6.1" (155mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 6:57 am and sunset at 4:37 pm. On the last day of December, in Aviston, sunrise is at 7:16 am and sunset at 4:47 pm CST.
Sunshine
In Aviston, the average sunshine in December is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Aviston. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Aviston?
What is the average humidity in December in Aviston?
How much does it rain in Aviston in December?
How much does it snow in Aviston in December?
What is the month with the shortest days in Aviston?
What is the average length of the day in December in Aviston?
When is the sunrise / sunset in December in Aviston?
How long on average sun shines in December in Aviston?
What is the month with the lowest UV index in Aviston?
What is the UV index reading in December in Aviston?
Average temperature in December
Aviston, IL
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Aviston, 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 (29.93"Hg).
Average wind speed in December
Aviston, IL
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Aviston, IL
- Average humidity in December: 77%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Aviston, IL
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in December
Aviston, IL
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8 days).
Average snowfall in December
Aviston, IL
- Average snowfall in December: 1.46"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Aviston, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.5 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
Aviston, IL
- Average daylight in December: 9h and 3min
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 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in December
Aviston, IL
- Average sunshine days in December: 18 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11 days).
Average UV index in December
Aviston, IL
- Average UV index in December: 2
The months with the highest UV index are May, 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
Aviston, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Aviston, 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).
Aviston, Illinois, USA
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