December weather forecastJohnsonville, SC
December
Weather in December
December, the first month of the winter in Johnsonville, is also a moderate month, with an average temperature varying between 42.3°F (5.7°C) and 57.4°F (14.1°C).Temperature
December marks a gentle change in average high-temperature, declining from November's refreshing 63.5°F (17.5°C) to a moderate 57.4°F (14.1°C). In December, Johnsonville encounters an average low-temperature of 42.3°F (5.7°C) during the night.Humidity
In Johnsonville, the average relative humidity in December is 78%.Rainfall
In Johnsonville, during December, the rain falls for 9.6 days and regularly aggregates up to 2.56" (65mm) of precipitation. Throughout the year, there are 147.1 rainfall days, and 21.77" (553mm) of precipitation is accumulated.Snowfall
In Johnsonville, 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 December in Johnsonville, sunrise is at 7:05 am and sunset at 5:09 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:19 pm EST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: A maximum daily UV index of 3 during December morphs into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Johnsonville, SC
- Average high temperature in December: 57.4°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (53.8°F).
- Average low temperature in December: 42.3°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.6°F).
Average pressure in December
Johnsonville, SC
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Johnsonville, SC
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Johnsonville, SC
- Average humidity in December: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (74%).
Average rainfall in December
Johnsonville, SC
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in December
Johnsonville, SC
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in December
Johnsonville, SC
- Average snowfall in December: 0"
The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Johnsonville, SC
- Average snowfall days in December: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight in December /
Average sunshine in December
Johnsonville, 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
Johnsonville, SC
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in December
Johnsonville, SC
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Johnsonville, SC
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Johnsonville, SC
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
