December weather forecastFlat Rock, NC
December
Weather in December
The first month of the winter, December, is also a frosty month in Flat Rock, North Carolina, with an average temperature fluctuating between 49.6°F (9.8°C) and 34.7°F (1.5°C).Temperature
December brings a slight decrease in the average high-temperature, shifting from a mild 56.5°F (13.6°C) in November to a frosty 49.6°F (9.8°C). An average low-temperature of 34.7°F (1.5°C) is observed during December nights in Flat Rock.Humidity
May and December, with an average relative humidity of 77%, are the most humid months in Flat Rock.Rainfall
The month with the most rainfall is December, when the rain falls for 10.2 days and typically aggregates up to 3.9" (99mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Flat Rock. The month with the most snowfall in Flat Rock is December, when snow falls for 1.6 days and typically aggregates up to 4.72" (120mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 7:20 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:27 pm EST.
Sunshine
December has the least sunshine of the year in Flat Rock, with an average of 5.7h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Flat Rock. 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: During December, 2 as the daily maximum UV index converts into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. To protect against the Sun's most potent rays, avoid direct exposure around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Flat Rock, NC
- Average high temperature in December: 49.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in December
Flat Rock, NC
- 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
Flat Rock, NC
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Flat Rock, NC
- Average humidity in December: 77%
The months with the highest relative humidity are May and December (77%).
The months with the lowest relative humidity are January, July and November (73%).
Average rainfall in December
Flat Rock, NC
- Average rainfall in December: 3.9"
The wettest month (with the highest rainfall) is December (3.9").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Flat Rock, NC
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is November (9 days).
Average snowfall in December
Flat Rock, NC
- Average snowfall in December: 4.72"
The month with the highest snowfall is December (4.72").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Flat Rock, NC
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Flat Rock, NC
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Flat Rock, NC
- Average sunshine days in December: 18.4 days
The months with the most sunshine days are October and November (19.3 days).
The month with the least sunshine days is July (7.9 days).
Average UV index in December
Flat Rock, NC
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Flat Rock, NC
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Flat Rock, NC
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, June, July, August, October and November (6mi).
The months with the lowest visibility are January, May, September and December (5mi).
