December weather forecastSaint Matthews, SC
December
Weather in December
December, the first month of the winter in Saint Matthews, is still a refreshing month, with an average temperature fluctuating between 57°F (13.9°C) and 42.6°F (5.9°C).Temperature
Saint Matthews's weather subtly changes with the onset of December, barely falling from a refreshing 63.1°F (17.3°C) in November to a moderate 57°F (13.9°C). In Saint Matthews, the average nighttime temperature during December is a cold 42.6°F (5.9°C).Humidity
In December, the average relative humidity is 75%.Rainfall
December is the month with the most rainfall in Saint Matthews. Rain falls for 11 days and accumulates 3.58" (91mm) of precipitation.Snowfall
January, February, November and December are months with snowfall. In Saint Matthews, in December, snow falls for 0.1 days, with typically accumulated 0.2" (5mm) of snow. Throughout the year, there are 1.7 snowfall days, and 0.87" (22mm) of snow is accumulated.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:10 am and sunset at 5:14 pm. On the last day of December, sunrise is at 7:27 am and sunset at 5:25 pm EST.
Sunshine
The month with the least sunshine in Saint Matthews is December, with an average of 5.5h of sunshine.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 vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 3 during December leads to these instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint Matthews, SC
- Average high temperature in December: 57°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in December: 42.6°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).
Average pressure in December
Saint Matthews, 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 (29.97"Hg).
Average wind speed in December
Saint Matthews, SC
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Saint Matthews, SC
- Average humidity in December: 75%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in December
Saint Matthews, SC
- Average rainfall in December: 3.58"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in December
Saint Matthews, SC
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Saint Matthews, SC
- Average snowfall in December: 0.2"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in December
Saint Matthews, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Saint Matthews, SC
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Saint Matthews, SC
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is August (9.4 days).
Average UV index in December
Saint Matthews, 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 and December (UV index 3).
Average cloud cover in December
Saint Matthews, SC
- Average cloud cover in December: 40
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in December
Saint Matthews, 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).
