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
With the beginning of December, the average high-temperature shows a decrease, transitioning from a chilly 49.5°F (9.7°C) in November to a cold 39.6°F (4.2°C). The nighttime temperature in Collinsville, during December, averages of 28.8°F (-1.8°C).Humidity
January, February and December, with an average relative humidity of 82%, are the most humid months.Rainfall
In Collinsville, in December, during 12.1 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, there are 169 rainfall days, and 31.85" (809mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 9.2 days. Throughout December, 2.17" (55mm) of snow is accumulated. Throughout the year, there are 40.7 snowfall days, and 12.48" (317mm) of snow is accumulated.Daylight
December has the shortest days of the year in Collinsville, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:40 am and sunset at 5:15 pm. On the last day of December, sunrise is at 7:58 am and sunset at 5:24 pm EST.
Sunshine
In Collinsville, the average sunshine in December is 4.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Collinsville. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. Boost your sun resistance with garments that are densely woven yet spacious. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
Is December cold in Collinsville?
What is the most humid month in Collinsville?
What is the average humidity in December in Collinsville?
How much does it rain in Collinsville in December?
How many days does it snow in December in Collinsville?
What is the month with the shortest days in Collinsville?
What is the average length of the day in December in Collinsville?
What time are sunrise and sunset in December in Collinsville?
How many hours of sunshine does Collinsville have in December?
What are the months with the lowest UV index in Collinsville?
What is the UV index intensity in December in Collinsville?
Average temperature in December
Collinsville, OH
- Average high temperature in December: 39.6°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 (34°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Collinsville, OH
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Collinsville, OH
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Collinsville, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and December (82%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Collinsville, OH
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Collinsville, OH
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is February (9.2 days).
Average snowfall in December
Collinsville, OH
- Average snowfall in December: 2.17"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Collinsville, OH
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Collinsville, OH
- 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 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Collinsville, OH
- Average sunshine days in December: 11.7 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is May (8.8 days).
Average UV index in December
Collinsville, OH
- 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
Collinsville, OH
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Collinsville, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Collinsville, Ohio, USA
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