December weather forecastSaint Marys, GA
December
Weather in December
December welcomes winter with a significant drop in temperature. There's an increase in cloud coverage from November, lending to gloomier skies. The humidity continues to rise, albeit the month receives less rainfall. As the end of the year approaches, Saint Marys experiences the colder side of the spectrum with temperatures swinging from 52.5°F (11.4°C) to 65.5°F (18.6°C).Temperature
The advent of December presents an average high-temperature of an enjoyable 65.5°F (18.6°C), maintaining a close correlation with the preceding month. Throughout the month of December, Saint Marys observes an average nighttime temperature of 52.5°F (11.4°C).Humidity
The months with the highest humidity in Saint Marys, Georgia, are August and December, with an average relative humidity of 77%.Rainfall
In Saint Marys, during December, the rain falls for 9 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Saint Marys, Georgia, during the entire year, the rain falls for 165.4 days and collects up to 23.15" (588mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
December has the shortest days of the year, with an average of 10h and 12min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 5:24 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:35 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.8h of sunshine.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index in Saint Marys, Georgia. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 4 translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint Marys, GA
- Average high temperature in December: 65.5°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 (61.5°F).
- Average low temperature in December: 52.5°F
The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).
Average pressure in December
Saint Marys, GA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in December
Saint Marys, GA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
Saint Marys, GA
- Average humidity in December: 77%
The months with the highest relative humidity are August and December (77%).
The month with the lowest relative humidity is March (71%).
Average rainfall in December
Saint Marys, GA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Saint Marys, GA
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is August (23.9 days).
The month with the least rainy days is February (8.3 days).
Average snowfall days in December
Saint Marys, GA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Saint Marys, GA
- Average daylight in December: 10h and 12min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 5h and 48min
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 48min).
Average sunshine days in December
Saint Marys, GA
- Average sunshine days in December: 19.4 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is August (4.5 days).
Average UV index in December
Saint Marys, GA
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in December
Saint Marys, GA
- Average cloud cover in December: 39
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in December
Saint Marys, GA
- 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).
