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
Rock Hill's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's agreeable 68.4°F (20.2°C) to a refreshing 62.6°F (17°C). Throughout the month of December, the nighttime temperature dips to an average of 47.8°F (8.8°C).Humidity
The most humid month is December, with an average relative humidity of 77%.Rainfall
In Rock Hill, during December, the rain falls for 9.8 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Rock Hill, during the entire year, the rain falls for 145 days and collects up to 17.91" (455mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
The month with the shortest days is December, with an average of 10h and 12min of daylight.On the first day of the month, sunrise is at 6:24 am and sunset at 4:42 pm. On the last day of December, sunrise is at 6:41 am and sunset at 4:54 pm CST.
Sunshine
In December, the average sunshine is 5.5h.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 3 in December leads to these recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
When it does not snow?
Does it snow in December?
What is the month with the shortest days in Rock Hill?
How many hours of daylight does Rock Hill have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Rock Hill have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Rock Hill, FL
- Average high temperature in December: 62.6°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in December: 47.8°F
The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in December
Rock Hill, FL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in December
Rock Hill, FL
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are January, February and March (7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Rock Hill, FL
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are May and October (70%).
Average rainfall in December
Rock Hill, FL
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is August (2.95").
The driest months (with the least rainfall) are January and November (0.83").
Average rainfall days in December
Rock Hill, FL
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is August (21.3 days).
The month with the least rainy days is November (6.8 days).
Average snowfall in December
Rock Hill, FL
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Rock Hill, FL
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Rock Hill, FL
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in December
Rock Hill, FL
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is November (21.8 days).
The months with the least sunshine days are July and August (6.3 days).
Average UV index in December
Rock Hill, FL
- Average UV index in December: 3
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Rock Hill, FL
- Average cloud cover in December: 42
The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in December
Rock Hill, FL
- 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).
Rock Hill, Florida, USA
Weather forecast for your location
2. Allow the app to use your location