January Weather in Charleston

Last updated: March 2, 2024

The weather in Charleston, United States, during January is characterized by an average temperature of 7°C (45°F). Highs can soar to 23°C (73°F), while lows may dip to -7°C (19°F). Typically, the humidity level in Charleston throughout January hovers around 84%.

-7°C (19°F)

Minimum temperature

7°C (45°F)

Average temperature

23°C (73°F)

Maximum temperature

84%

Humidity

Precipitation and Sunshine hours

In January, Charleston averages 120 mm (4.7 inches) of rainfall, typically over the course of 9 rainy days. The month enjoys an average of 10 hours 9 minutes of daylight, with the sun shining for approximately 4 hours 42 minutes each day. Additionally, there is a 38% probability of sunny days during this period.

120 mm (4.7 inches)

Precipitation

9 rainy days

Rainy days

4 hours 42 minutes

Sunshine hours

38%

Chance of sun

UV Index

In January, the UV Index in Charleston reaches a maximum of 4, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 2 3 4 4 4 3 2 1 1 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

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