December weather forecastDekalb, SC
December
Weather in December
December, the first month of the winter in Dekalb, is still a mild month, with an average temperature ranging between min 41.7°F (5.4°C) and max 55.6°F (13.1°C).Temperature
The transition into December is accompanied by a slight temperature decrease, with the average high-temperature shifting from a refreshing 61.7°F (16.5°C) in November to a mild 55.6°F (13.1°C). Dekalb records an average nighttime low-temperature of 41.7°F (5.4°C) throughout December.Humidity
In Dekalb, the average relative humidity in December is 74%.Rainfall
In Dekalb, in December, it is raining for 8 days, with typically 1.1" (28mm) of accumulated precipitation. In Dekalb, South Carolina, during the entire year, the rain falls for 116.1 days and collects up to 11.42" (290mm) of precipitation.Snowfall
In Dekalb, snow does not fall in March through December.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 5:12 pm. On the last day of December, in Dekalb, sunrise is at 7:28 am and sunset at 5:22 pm EST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine in Dekalb.UV index
In Dekalb, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 3 translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dekalb, SC
- Average high temperature in December: 55.6°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (52.2°F).
- Average low temperature in December: 41.7°F
The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in December
Dekalb, SC
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Dekalb, SC
- Average wind speed in December: 7.2mph
The windiest months (with the highest average wind speed) are February and April (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Dekalb, SC
- Average humidity in December: 74%
The month with the highest relative humidity is May (75%).
The months with the lowest relative humidity are January, March and November (70%).
Average rainfall in December
Dekalb, SC
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is August (1.42").
The driest month (with the least rainfall) is September (0.59").
Average rainfall days in December
Dekalb, SC
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in December
Dekalb, SC
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Dekalb, SC
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and December (0 days).
Average daylight in December /
Average sunshine in December
Dekalb, SC
- Average daylight in December: 9h and 54min
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 36min
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 36min).
Average sunshine days in December
Dekalb, SC
- Average sunshine days in December: 21.2 days
The month with the most sunshine days is October (23.9 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Dekalb, 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
Dekalb, SC
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 28).
Average visibility in December
Dekalb, 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).
