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
Transition into December subtly marks a drop in the average high-temperature, moderately moving from a mild 59.9°F (15.5°C) in November to a cool 53.1°F (11.7°C). Fort Mill experiences a mean temperature of 39°F (3.9°C) during December nights.Humidity
December is the most humid month, with an average relative humidity of 75%.Rainfall
In Fort Mill, in December, during 10 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. In Fort Mill, during the entire year, the rain falls for 146.1 days and collects up to 28.94" (735mm) of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows in Fort Mill, South Carolina. Throughout December, in the average 0.5 snowfall days, it receives 0.83" (21mm) of snow. In Fort Mill, during the entire year, snow falls for 3.1 days and aggregates up to 3.58" (91mm) 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 the month, sunrise is at 7:13 am and sunset at 5:12 pm. On the last day of December, in Fort Mill, sunrise is at 7:31 am and sunset at 5:22 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 2 in December transforms into this advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What are the temperatures in Fort Mill in December?
What is the most humid month in Fort Mill?
What is the average humidity in December in Fort Mill?
How many days does it rain in December in Fort Mill?
When does it start to snow in Fort Mill?
What is the month with the shortest days in Fort Mill?
What is the average length of the day in December in Fort Mill?
When are sunrise and sunset in December in Fort Mill?
What is the month with the least sunshine in Fort Mill?
How many hours of sunshine does Fort Mill have in December?
When is the lowest UV index in Fort Mill?
What is the UV index intensity in December in Fort Mill?
Average temperature in December
Fort Mill, SC
- Average high temperature in December: 53.1°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in December: 39°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in December
Fort Mill, SC
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Fort Mill, SC
- Average wind speed in December: 6.8mph
The windiest months (with the highest average wind speed) are February and April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Fort Mill, SC
- Average humidity in December: 75%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Fort Mill, SC
- Average rainfall in December: 2.91"
The wettest month (with the highest rainfall) is August (3.23").
The driest months (with the least rainfall) are September and October (1.81").
Average rainfall days in December
Fort Mill, SC
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in December
Fort Mill, SC
- Average snowfall in December: 0.83"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Fort Mill, SC
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.4 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
Fort Mill, SC
- Average daylight in December: 9h and 5min
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 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Fort Mill, SC
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is October (22 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in December
Fort Mill, SC
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Fort Mill, SC
- Average cloud cover in December: 44
The months with the most cloud cover are February and December (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Fort Mill, 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).
Fort Mill, South Carolina, USA
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