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 brings a slight decrease in the average high-temperature, shifting from an enjoyable 63.5°F (17.5°C) in November to a mild 57.4°F (14.1°C). Throughout December nights, Greeleyville experiences a consistent temperature average of 42.3°F (5.7°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Greeleyville, in December, it is raining for 9.9 days, with typically 3.54" (90mm) of accumulated precipitation. In Greeleyville, during the entire year, the rain falls for 168.1 days and collects up to 33.43" (849mm) of precipitation.Snowfall
March through December are months without snowfall.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 7:06 am and sunset at 5:11 pm. On the last day of December, sunrise is at 7:24 am and sunset at 5:22 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.7h of sunshine.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 3 during December morphs into the following directions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Greeleyville in December?
What is the average humidity in December?
How much does it rain in December?
When it does not snow?
Does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Greeleyville, SC
- Average high temperature in December: 57.4°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (53.8°F).
- Average low temperature in December: 42.3°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in December
Greeleyville, SC
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Greeleyville, SC
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Greeleyville, SC
- Average humidity in December: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in December
Greeleyville, SC
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is August (4.76").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Greeleyville, SC
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is July (22.3 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in December
Greeleyville, SC
- Average snowfall in December: 0"
The months with the highest snowfall are January and February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Greeleyville, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.6 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
Greeleyville, SC
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 42min).
Average sunshine days in December
Greeleyville, SC
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (6.1 days).
Average UV index in December
Greeleyville, SC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Greeleyville, SC
- Average cloud cover in December: 41
The months with the most cloud cover are February and December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Greeleyville, SC
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Greeleyville, South Carolina, USA
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