Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January, on average, is the coldest month in Charleston, South Carolina, registering a high temperature of 57°F (13.9°C) and a low of 44.4°F (6.9°C).Humidity
The months with the lowest humidity in Charleston, South Carolina, are January and March, with an average relative humidity of 73%.Rainfall
January is the month with the least rainfall in Charleston. Rain falls for 9.8 days and accumulates 1.42" (36mm) of precipitation.Snowfall
January and December are months with snowfall in Charleston, South Carolina. The month with the most snowfall in Charleston is January, when snow falls for 0.4 days and typically aggregates up to 0.12" (3mm) of snow.Ocean temperature
In January, the average ocean temperature is 63.1°F (17.3°C).Note: When the surface water temperature is 63.1°F (17.3°C), most do not enjoy swimming. Breathing control becomes more complex as temperatures drop below 69.8°F (21°C).
Daylight
In Charleston, the average length of the day in January is 10h and 17min.On the first day of the month, sunrise is at 7:22 am and sunset at 5:24 pm. On the last day of January, sunrise is at 7:15 am and sunset at 5:50 pm EST.
Sunshine
In Charleston, the average sunshine in January is 5.8h.UV index
January is the month with the lowest UV index in Charleston, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In January, the average maximum UV index of 3 translates into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Charleston?
What are January temperatures in Charleston?
What are the least humid months in Charleston?
What is the average humidity in January in Charleston?
What is the driest month in Charleston?
How much does it rain in Charleston in January?
What is the snowiest month in Charleston?
What is the last month it snows in Charleston?
How cold is the water in January in Charleston?
What is the average length of the day in January in Charleston?
When are sunrise and sunset in January in Charleston?
How long on average sun shines in January in Charleston?
What is the month with the lowest UV index in Charleston?
How high is the UV index in January in Charleston?
Average temperature in January
Charleston, SC
- Average high temperature in January: 57°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in January: 44.4°F
The month with the highest average low temperature is July (77.4°F).
The coldest month (with the lowest average low temperature) is January (44.4°F).
Average pressure in January
Charleston, SC
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in January
Charleston, SC
- Average wind speed in January: 8.9mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).
Average humidity in January
Charleston, SC
- Average humidity in January: 73%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).
Average rainfall in January
Charleston, SC
- Average rainfall in January: 1.42"
The wettest month (with the highest rainfall) is August (7.13").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in January
Charleston, SC
- Average rainfall days in January: 9.8 days
The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in January
Charleston, SC
- Average snowfall in January: 0.12"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Charleston, SC
- Average snowfall days in January: 0.4 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in January
Charleston, SC
- Average sea temperature in January: 63.1°F
The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).
Average daylight in January /
Average sunshine in January
Charleston, SC
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 5h and 5min
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 42min).
Average sunshine days in January
Charleston, SC
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (3.8 days).
Average UV index in January
Charleston, SC
- Average UV index in January: 3
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in January
Charleston, SC
- Average cloud cover in January: 35
The months with the most cloud cover are February and December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in January
Charleston, SC
- Average visibility in January: 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).
Charleston, South Carolina, USA
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