December weather forecastMontvale, VA
December
Weather in December
The first month of the winter, December, is also a frosty month in Montvale, Virginia, with an average temperature varying between 45.7°F (7.6°C) and 32°F (0°C).Temperature
With the onset of December, Montvale's average high-temperature slightly adjusts, moderately receding from November's cool 54°F (12.2°C) to a frosty 45.7°F (7.6°C). Montvale usually reports an average low-temperature of 32°F (0°C) during the month of December.Humidity
In Montvale, the average relative humidity in December is 77%.Rainfall
In Montvale, in December, it is raining for 9.3 days, with typically 1.18" (30mm) of accumulated precipitation. In Montvale, Virginia, during the entire year, the rain falls for 134.1 days and collects up to 14.76" (375mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Montvale. In December, it is snowing for 2.4 days. Throughout December, 1.18" (30mm) of snow is accumulated. Throughout the year, there are 13.8 snowfall days, and 5.51" (140mm) of snow is accumulated.Daylight
The month with the shortest days in Montvale is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 5:01 pm. On the last day of December, sunrise is at 7:33 am and sunset at 5:11 pm EST.
Sunshine
In Montvale, the average sunshine in December is 5.5h.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 minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Montvale, VA
- Average high temperature in December: 45.7°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Montvale, 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
Montvale, VA
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Montvale, VA
- Average humidity in December: 77%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is July (72%).
Average rainfall in December
Montvale, VA
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in December
Montvale, VA
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is November (6.9 days).
Average snowfall in December
Montvale, VA
- Average snowfall in December: 1.18"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Montvale, VA
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is February (4.3 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
Montvale, VA
- Average daylight in December: 9h and 36min
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 30min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Montvale, VA
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is November (22.4 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in December
Montvale, 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
Montvale, VA
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 30).
Average visibility in December
Montvale, VA
- Average visibility in December: 5mi
The months with the highest visibility are June, July and November (6mi).
The months with the lowest visibility are January, February, March, April, May, August, September, October and December (5mi).
