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
Mountcastle's transition into December involves a gentle shift in temperature, receding from a moderate 57.7°F (14.3°C) in November to a fresh 50.2°F (10.1°C). Mountcastle's nighttime temperature during December is consistently averaged at a wintry 35.8°F (2.1°C).Humidity
With an average relative humidity of 79%, December is the most humid month in Mountcastle.Rainfall
In Mountcastle, during December, the rain falls for 11.5 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Mountcastle, during the entire year, the rain falls for 166.1 days and collects up to 33.27" (845mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 1.5 days. Throughout December, 0.91" (23mm) of snow is accumulated. In Mountcastle, during the entire year, snow falls for 10.3 days and aggregates up to 5.71" (145mm) of snow.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in Mountcastle, Virginia.On the first day of the month, sunrise is at 7:04 am and sunset at 4:50 pm. On the last day of December, in Mountcastle, sunrise is at 7:22 am and sunset at 5:00 pm EST.
Sunshine
In Mountcastle, the average sunshine in December is 5.3h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the average December temperature in Mountcastle?
What is the most humid month in Mountcastle?
What is the average humidity in December in Mountcastle?
How much does it rain in Mountcastle in December?
How many days does it snow in December in Mountcastle?
What is the month with the shortest days in Mountcastle?
How many hours of daylight does Mountcastle have in December?
When are sunrise and sunset in December in Mountcastle?
How long on average sun shines in December in Mountcastle?
What are the months with the lowest UV index in Mountcastle?
How high is the UV index in December in Mountcastle?
Average temperature in December
Mountcastle, VA
- Average high temperature in December: 50.2°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 35.8°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in December
Mountcastle, VA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Mountcastle, VA
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Mountcastle, VA
- Average humidity in December: 79%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Mountcastle, VA
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Mountcastle, VA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (18.4 days).
The months with the least rainy days are January and November (10.2 days).
Average snowfall in December
Mountcastle, VA
- Average snowfall in December: 0.91"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mountcastle, VA
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is February (3.3 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
Mountcastle, 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 36min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in December
Mountcastle, VA
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in December
Mountcastle, VA
- 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 and December (UV index 2).
Average cloud cover in December
Mountcastle, VA
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Mountcastle, VA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Mountcastle, Virginia, USA
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