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
Start of December brings a slight shift in the average high-temperature, dipping a bit from November's moderate 56.3°F (13.5°C) to a frosty 48.6°F (9.2°C). Throughout December nights, Collinsville registers an average low-temperature of 34.2°F (1.2°C).Humidity
The months with the highest humidity in Collinsville are May and December, with an average relative humidity of 76%.Rainfall
In Collinsville, during December, the rain falls for 9.2 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 132.1 rainfall days, and 19.96" (507mm) of precipitation is accumulated.Snowfall
January through March, May, November and December are months with snowfall. The month with the most snowfall is December, when snow falls for 1.1 days and typically aggregates up to 2.05" (52mm) of snow.Daylight
December has the shortest days of the year in Collinsville, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 7:14 am and sunset at 5:03 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:13 pm EST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Collinsville, Virginia, are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Collinsville in December?
What are the most humid months?
What is the average humidity in December in Collinsville?
How much does it rain in December?
When does it snow the most?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Collinsville have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Collinsville, VA
- Average high temperature in December: 48.6°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (44.1°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in December
Collinsville, VA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Collinsville, VA
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Collinsville, VA
- Average humidity in December: 76%
The months with the highest relative humidity are May and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Collinsville, VA
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in December
Collinsville, VA
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (7 days).
Average snowfall in December
Collinsville, VA
- Average snowfall in December: 2.05"
The month with the highest snowfall is December (2.05").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in December
Collinsville, VA
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Collinsville, VA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in December
Collinsville, VA
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.2 days).
Average UV index in December
Collinsville, VA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Collinsville, VA
- Average cloud cover in December: 39
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Collinsville, VA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Collinsville, Virginia, USA
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