January weather forecast
Charleston International Airport, SC

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Weather in January

January's weather in Charleston International Airport sees a mix of rain and cold temperatures, contrasting with the milder climes experienced in later months. Temperature fluctuations are observed, reaching a high of 41°F (5°C) and plunging to a low of 23°F (-5°C). Sunlight is sparse, with daylight hours accounting for just a fraction of the day. Winter coats are essential this month, as frosty temperatures settle in after sunset. With rain observed on numerous days, waterproof wear is an advisable addition to the winter wardrobe.

Temperature

The lowest temperatures are recorded in January, with averages reaching a high of 41°F (5°C) and a low of 23°F (-5°C).

Rainfall

In Charleston International Airport, in January, it is raining for 15 days, with typically 3.11" (79mm) of accumulated precipitation. In Charleston International Airport, South Carolina, during the entire year, the rain falls for 151 days and collects up to 41.93" (1065mm) of precipitation.

Daylight

The average length of the day in January in Charleston International Airport, South Carolina, is 10h and 16min.
On the first day of January, sunrise is at 7:22 am and sunset at 5:24 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:51 pm EST.

Sunshine

The average sunshine in January in Charleston International Airport is 4h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Charleston International Airport. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 2 suggests this advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What month is the coldest in Charleston International Airport?

With average high and low temperatures of 41°F (5°C) and 23°F (-5°C) respectively, January is Charleston International Airport's coldest month.

How cold is January in Charleston International Airport?

The average high-temperature, in January, in Charleston International Airport, is 41°F (5°C), while the average low-temperature is 23°F (-5°C).

How many days does it rain in January in Charleston International Airport?

In January, in Charleston International Airport, the rain falls for 15 days. Throughout January, 3.11" (79mm) of precipitation is accumulated.

How many hours of daylight does Charleston International Airport have in January?

The average day length in January is 10h and 16min.

What time are sunrise and sunset in January in Charleston International Airport?

On the first day of January in Charleston International Airport, South Carolina, sunrise is at 7:22 am and sunset at 5:24 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:51 pm EST.

How long on average sun shines in January in Charleston International Airport?

The average sunshine duration in January in Charleston International Airport is 4h.

What is the month with the lowest UV index in Charleston International Airport?

January and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in January in Charleston International Airport?

In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Average high temperature
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in January
Charleston International Airport, SC

Average temperature in January - Charleston International Airport, SC
  • Average high temperature in January: 41°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in January: 23°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23°F).

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Average rainfall in January
Charleston International Airport, SC

Average rainfall in January - Charleston International Airport, SC
  • Average rainfall in January: 3.1"

The wettest month (with the highest rainfall) is July (4.8").
The driest month (with the least rainfall) is October (2.8").

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Average rainfall days in January
Charleston International Airport, SC

Average rainfall days in January - Charleston International Airport, SC
  • Average rainfall days in January: 15 days

The month with the highest number of rainy days is January (15 days).
The months with the least rainy days are September and October (10 days).

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Average daylight in January /
Average sunshine in January
Charleston International Airport, SC

Average daylight in January / Average sunshine in January - Charleston International Airport, 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: 4h

The months with the most sunshine are May, June, July and August (Average sunshine: 8h).
The month with the least sunshine is December (Average sunshine: 3h).

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Average UV index in January
Charleston International Airport, SC

Average UV index in January - Charleston International Airport, SC
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 9).
The months with the lowest UV index are January and December (UV index 2).

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Charleston International Airport, South Carolina, USA

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