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
December reports an average high-temperature of a mild 58.3°F (14.6°C), slightly varied from November's 63.5°F (17.5°C). Forestbrook, in the month of December, anticipates a consistent average low-temperature of 46.9°F (8.3°C).Humidity
The months with the highest humidity are May, June, August and December, with an average relative humidity of 78%.Rainfall
In December, the rain falls for 11.6 days. Throughout December, 2.64" (67mm) of precipitation is accumulated. Throughout the year, there are 166.5 rainfall days, and 28.78" (731mm) of precipitation is accumulated.Snowfall
Months with snowfall are January, February and December. December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Forestbrook, during the entire year, snow falls for 1 days and aggregates up to 0.16" (4mm) of snow.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 5:07 pm. On the last day of December, sunrise is at 7:20 am and sunset at 5:17 pm EST.
Sunshine
With an average of 5.6h of sunshine, December has the least sunshine of the year.UV index
The average daily maximum UV index in December is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: During December, 4 as the daily maximum UV index converts into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Forestbrook have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Forestbrook have in December?
What is the UV index reading in December?
Average temperature in December
Forestbrook, SC
- Average high temperature in December: 58.3°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (54.3°F).
- Average low temperature in December: 46.9°F
The month with the highest average low temperature is July (76.3°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).
Average pressure in December
Forestbrook, SC
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Forestbrook, SC
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.9mph).
Average humidity in December
Forestbrook, SC
- Average humidity in December: 78%
The months with the highest relative humidity are May, June, August and December (78%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Forestbrook, SC
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is August (4.53").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in December
Forestbrook, SC
- Average rainfall days in December: 11.6 days
The months with the highest number of rainy days are July and August (19.8 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in December
Forestbrook, SC
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Forestbrook, SC
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Forestbrook, SC
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
Forestbrook, SC
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in December
Forestbrook, SC
- Average UV index in December: 4
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in December
Forestbrook, SC
- Average cloud cover in December: 40
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in December
Forestbrook, SC
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Forestbrook, South Carolina, USA
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