December weather forecastWaterloo, SC
December
Weather in December
December, the first month of the winter in Waterloo, is still a cool month, with an average temperature varying between 39.7°F (4.3°C) and 54.5°F (12.5°C).Temperature
As December commences, the average high-temperature subtly reduces, transitioning from an enjoyable 61.5°F (16.4°C) in November to a fresh 54.5°F (12.5°C). The temperature in Waterloo dips to an average of 39.7°F (4.3°C) during December nights.Humidity
The most humid month is December, with an average relative humidity of 77%.Rainfall
The month with the most rainfall in Waterloo is December, when the rain falls for 11.5 days and typically aggregates up to 3.39" (86mm) of precipitation.Snowfall
In Waterloo, snow does not fall in April 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 December, sunrise is at 7:16 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:28 pm EST.
Sunshine
December has the least sunshine of the year in Waterloo, with an average of 5.3h of sunshine.UV index
The average daily maximum UV index in December in Waterloo is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 3 suggests these recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Waterloo, SC
- Average high temperature in December: 54.5°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in December: 39.7°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (35.1°F).
Average pressure in December
Waterloo, 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
Waterloo, SC
- Average wind speed in December: 6.8mph
The windiest months (with the highest average wind speed) are February and April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Waterloo, 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
Waterloo, SC
- Average rainfall in December: 3.39"
The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Waterloo, SC
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is October (8.5 days).
Average snowfall in December
Waterloo, SC
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Waterloo, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (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
Waterloo, 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 18min
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
Waterloo, SC
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is October (21.1 days).
The month with the least sunshine days is August (11.4 days).
Average UV index in December
Waterloo, 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
Waterloo, SC
- Average cloud cover in December: 43
The month with the most cloud cover is December (Cloud cover 43).
The months with the least cloud cover are June, July and October (Cloud cover 29).
Average visibility in December
Waterloo, 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).
