January weather forecast and climate
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina, seen in the twilight light
Trees along both sides of a street in Charleston, South Carolina, seen in the twilight light

What is the coldest month in Charleston?

The coldest month in Charleston, South Carolina, is January, with an average high-temperature of 59°F (15°C) and an average low-temperature of 37.6°F (3.1°C).

What is the temperature in January in Charleston?

In Charleston, South Carolina, in January, the average high-temperature is 59°F (15°C), and the average low-temperature is 37.6°F (3.1°C).

How many days does it rain in January in Charleston?

In Charleston, in January, during 9.6 rainfall days, typically, 3.7" (94.2mm) of precipitation is accumulated.

Does it snow in Charleston in January?

In January, in Charleston, South Carolina, it doesn't snow. December is the latest month when it typically snows.

How cold is the water in January in Charleston?

In Charleston, in January, the average water temperature is 63.1°F (17.3°C). For most, swimming in 63.1°F (17.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Average temperature in January - Charleston, SC
  • Average high temperature in January: 59°F

The warmest month (with the highest average high temperature) is July (91.1°F).
The month with the lowest average high temperature is January (59°F).

  • Average low temperature in January: 37.5°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.5°F).

Average humidity in January - Charleston, SC
  • Average humidity in January: 69.8%

The month with the highest relative humidity is August (78.9%).
The month with the lowest relative humidity is February (67.4%).

Average rainfall in January - Charleston, SC
  • Average rainfall in January: 3.7"

The wettest month (with the highest rainfall) is August (7.2").
The driest month (with the lowest rainfall) is November (2.4").

Average rainfall days in January - Charleston, SC
  • Average rainfall days in January: 9.6 days

The month with the highest number of rainy days is August (13.2 days).
The month with the lowest number of rainy days is November (7 days).

Average snowfall in January - Charleston, SC
  • Average snowfall in January: 0"

The month with the highest snowfall is December (0.5").
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in January - Charleston, SC
  • Average snowfall days in January: 0.1 days

Months with the highest number of snowfall days are February and December (0.2 days).
Months with the lowest number of 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: 10.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in January: 5.8h

The month with most sunshine is May (Average sunshine: 9.5h).
The month with least sunshine is December (Average sunshine: 5.5h).

Average UV index in January - Charleston, SC
  • Average UV index in January: 3

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).

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