December weather forecastUpperville, VA
December
Weather in December
The first month of the winter, December, is also a frosty month in Upperville, Virginia, with an average temperature ranging between min 30.4°F (-0.9°C) and max 43.5°F (6.4°C).Temperature
December ushers in a minute temperature change, with average high-temperatures reducing from November's cool 52.3°F (11.3°C) to a frosty 43.5°F (6.4°C). December is noted for a mean low-temperature of 30.4°F (-0.9°C).Humidity
The months with the highest humidity are May, October and December, with an average relative humidity of 78%.Rainfall
In Upperville, in December, it is raining for 9.3 days, with typically 1.65" (42mm) of accumulated precipitation. In Upperville, during the entire year, the rain falls for 152.4 days and collects up to 23.5" (597mm) of precipitation.Snowfall
Months with snowfall in Upperville are January through May, October through December. In December, it is snowing for 3 days. Throughout December, 1.54" (39mm) of snow is accumulated. Throughout the year, there are 19.9 snowfall days, and 9.69" (246mm) of snow is accumulated.Daylight
December has the shortest days of the year in Upperville, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:12 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:59 pm EST.
Sunshine
January and December, with an average of 5h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Upperville are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 2 in December transforms into this advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Upperville, VA
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in December
Upperville, VA
- Average pressure in December: 30.11"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
Upperville, VA
- Average wind speed in December: 6.3mph
The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Upperville, VA
- Average humidity in December: 78%
The months with the highest relative humidity are May, October and December (78%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Upperville, VA
- Average rainfall in December: 1.65"
The wettest months (with the highest rainfall) are May, July and August (2.68").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in December
Upperville, VA
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Upperville, VA
- Average snowfall in December: 1.54"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Upperville, VA
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Upperville, VA
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 0min).
Average sunshine days in December
Upperville, VA
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Upperville, 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, February, November and December (UV index 2).
Average cloud cover in December
Upperville, VA
- Average cloud cover in December: 47
The months with the most cloud cover are March and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Upperville, VA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are May, September, October and December (5mi).
