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
Transitioning from November to December involves a subtle drop in average high-temperatures, descending from an enjoyable 62.2°F (16.8°C) to a still refreshing 56.5°F (13.6°C). During the month of December, Marion's nighttime temperature lowers to an average of 40.8°F (4.9°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Marion, in December, it is raining for 11.5 days, with typically 3.31" (84mm) of accumulated precipitation. Throughout the year, there are 171 rainfall days, and 34.29" (871mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Marion, during the entire year, snow falls for 1.6 days and aggregates up to 1.1" (28mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:18 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.6h of sunshine.UV index
In Marion, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 3 during December translates into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
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 Marion have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Marion have in December?
What is the UV index reading in December in Marion?
Average temperature in December
Marion, SC
- Average high temperature in December: 56.5°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in December: 40.8°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in December
Marion, SC
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Marion, SC
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Marion, SC
- Average humidity in December: 77%
The months with the highest relative humidity are May, August and September (78%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall in December
Marion, SC
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in December
Marion, SC
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is October (8.7 days).
Average snowfall in December
Marion, SC
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Marion, SC
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January and February (0.7 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
Marion, SC
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in December
Marion, SC
- Average sunshine days in December: 18.3 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (8 days).
Average UV index in December
Marion, SC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Marion, SC
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Marion, 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).
Marion, South Carolina, USA
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