December weather forecast
Dayton, VA

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Weather in December

The first month of the winter, December, is still a chilly month in Dayton, Virginia, with an average temperature fluctuating between 43.7°F (6.5°C) and 28.9°F (-1.7°C).

Temperature

The transition to December results in a modest reduction in average high-temperature, moving from a cool 52.2°F (11.2°C) in November to a chilly 43.7°F (6.5°C). The average temperature in Dayton drops to a subzero cold 28.9°F (-1.7°C) during the night in the month of December.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Dayton, in December, during 10.4 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Dayton, during the entire year, the rain falls for 167.3 days and collects up to 30.35" (771mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Dayton, during December, snow falls for 3.5 days and regularly aggregates up to 2.52" (64mm) of snow. Throughout the year, there are 23.3 snowfall days, and 16.89" (429mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:14 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:05 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 5.3h of sunshine.

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 estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jul 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In December, the average high-temperature and low-temperature are 43.7°F (6.5°C) and 28.9°F (-1.7°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 87.8°F (31°C).

What is the average humidity in December?

In Dayton, the average relative humidity in December is 77%.

How much does it rain in December?

In Dayton, in December, during 10.4 rainfall days, 2.44" (62mm) of precipitation is typically accumulated.

How much does it snow in December?

In Dayton, in December, snow falls for 3.5 days, with typically accumulated 2.52" (64mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

How many hours of daylight does Dayton have in December?

In Dayton, the average day length in December is 9h and 32min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:14 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:05 pm EST.

What is the month with the least sunshine?

With an average of 5.3h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Dayton have in December?

The average sunshine duration in December is 5.3h.

What is the month with the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Dayton, VA

Average temperature in December - Dayton, VA
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in December: 28.9°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in December
Dayton, VA

Average pressure in December - Dayton, VA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in December
Dayton, VA

Average wind speed in December - Dayton, VA
  • Average wind speed in December: 5.7mph

The windiest months (with the highest average wind speed) are February and April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in December
Dayton, VA

Average humidity in December - Dayton, VA
  • Average humidity in December: 77%

The months with the highest relative humidity are May, September and October (78%).
The months with the lowest relative humidity are January and July (74%).

Average rainfall in December
Dayton, VA

Average rainfall in December - Dayton, VA
  • Average rainfall in December: 2.44"

The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is November (1.77").

Average rainfall days in December
Dayton, VA

Average rainfall days in December - Dayton, VA
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is November (9 days).

Average snowfall in December
Dayton, VA

Average snowfall in December - Dayton, VA
  • Average snowfall in December: 2.52"

The month with the highest snowfall is March (4.45").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Dayton, VA

Average snowfall days in December - Dayton, VA
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Dayton, VA

Average daylight in December / Average sunshine in December - Dayton, VA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in December
Dayton, VA

Average sunshine days in December - Dayton, VA
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (9.9 days).

Average UV index in December
Dayton, VA

Average UV index in December - Dayton, VA
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Dayton, VA

Average cloud cover in December - Dayton, VA
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are June and July (Cloud cover 32).

Average visibility in December
Dayton, VA

Average visibility in December - Dayton, VA
  • Average visibility in December: 5mi

The months with the highest visibility are February, April, June, July and November (6mi).
The months with the lowest visibility are January, March, May, August, September, October and December (5mi).

Dayton, Virginia, USA

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