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
The arrival of December corresponds with a shift in temperature, down from a chilly 49.8°F (9.9°C) in November to a wintry 38.8°F (3.8°C). Bethany throughout December, records an average low-temperature of 28.4°F (-2°C).Humidity
The average relative humidity in December in Bethany is 79%.Rainfall
In December, the rain falls for 7.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. In Bethany, during the entire year, the rain falls for 130.9 days and collects up to 15.43" (392mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Bethany. In Bethany, in December, snow falls for 4.5 days, with typically accumulated 0.91" (23mm) of snow. Throughout the year, in Bethany, there are 21.5 snowfall days, and 4.53" (115mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December in Bethany, Illinois, sunrise is at 6:57 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:40 pm CST.
Sunshine
In Bethany, the average sunshine in December is 4.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Bethany. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
Is December cold in Bethany?
What is the average humidity in December in Bethany?
How many days does it rain in December in Bethany?
How much does it snow in Bethany in December?
What is the month with the shortest days in Bethany?
What is the average length of the day in December in Bethany?
What time are sunrise and sunset in December in Bethany?
How many hours of sunshine does Bethany have in December?
What is the month with the lowest UV index in Bethany?
What is the UV index reading in December in Bethany?
Average temperature in December
Bethany, IL
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Bethany, 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 (29.93"Hg).
Average wind speed in December
Bethany, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Bethany, 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
Bethany, IL
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is June (1.85").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in December
Bethany, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
Bethany, IL
- Average snowfall in December: 0.91"
The month with the highest snowfall is January (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Bethany, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (6.4 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
Bethany, IL
- Average daylight in December: 9h and 2min
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 4min
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
Bethany, IL
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Bethany, 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
Bethany, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Bethany, 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).
Bethany, Illinois, USA
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