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 subtle shift in Mount Heron's weather is observed as November turns into December, with the average high temperature reducing from a cool 52.3°F (11.3°C) to a frosty 44.2°F (6.8°C). Mount Heron, during the month of December, experiences an average low-temperature of 30.6°F (-0.8°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Mount Heron, during December, the rain falls for 10.2 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Mount Heron, during the entire year, the rain falls for 155.9 days and collects up to 23.31" (592mm) of precipitation.Snowfall
Months with snowfall in Mount Heron are January through May, October through December. December is the month with the most snowfall. Snow falls for 6.8 days and accumulates 4.65" (118mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 7:23 am and sunset at 5:10 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:21 pm EST.
Sunshine
The average sunshine in December in Mount Heron, Virginia, is 4.8h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. 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. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
How cold is December in Mount Heron?
What is the average humidity in December in Mount Heron?
How much does it rain in Mount Heron in December?
When does it snow the most in Mount Heron?
How much does it snow in Mount Heron in December?
What is the month with the shortest days in Mount Heron?
What is the average length of the day in December in Mount Heron?
What time are sunrise and sunset in December in Mount Heron?
How many hours of sunshine does Mount Heron have in December?
What is the month with the lowest UV index in Mount Heron?
How high is the UV index in December in Mount Heron?
Average temperature in December
Mount Heron, VA
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in December
Mount Heron, 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 (29.99"Hg).
Average wind speed in December
Mount Heron, VA
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are January, February and April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Mount Heron, VA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Mount Heron, VA
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is February (2.72").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in December
Mount Heron, VA
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Mount Heron, VA
- Average snowfall in December: 4.65"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Heron, VA
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Heron, VA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Mount Heron, VA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in December
Mount Heron, VA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Mount Heron, VA
- Average cloud cover in December: 55
The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Mount Heron, VA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Mount Heron, Virginia, USA
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