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
A moderate decline in average high-temperatures is noted in December, moving from a refreshing 62.1°F (16.7°C) in November to a mild 55.8°F (13.2°C). During the nights in December, McCormick experiences a consistent average temperature of 40.5°F (4.7°C).Humidity
With an average relative humidity of 77%, December is the most humid month.Rainfall
The month with the most rainfall is December, when the rain falls for 11.6 days and typically aggregates up to 3.27" (83mm) of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows in McCormick. Throughout December, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. In McCormick, during the entire year, snow falls for 1.2 days and aggregates up to 1.34" (34mm) of snow.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:16 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:30 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.3h of sunshine.UV index
In McCormick, South Carolina, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 3 in December leads to these guidelines:
Make use of precautions - Suggestions to resist sunburn are communicated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the most humid month?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
When does it start to snow?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
McCormick, SC
- Average high temperature in December: 55.8°F
The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in December: 40.5°F
The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in December
McCormick, 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
McCormick, SC
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
McCormick, SC
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
McCormick, SC
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
McCormick, SC
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in December
McCormick, SC
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
McCormick, 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
McCormick, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
McCormick, SC
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in December
McCormick, SC
- Average UV index in December: 3
The months with the highest UV index are June and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
McCormick, SC
- Average cloud cover in December: 42
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in December
McCormick, 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).
McCormick, South Carolina, USA
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