May weather forecast
Charleston International Airport, SC

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Weather in May

May truly brings spring weather to Charleston International Airport, with steadily increasing temperatures and a more pleasing climate. Being a rainy season, the precipitation averages around 3.8" (97mm), accompanied by cooler temperatures at night. Longer days offer extended sunlight hours, and the UV index is at its peak. This period is characterized by a blend of heat and rainfall, painting a picture of blooming flora and rejuvenated fauna. The month’s end sets the stage for the impending summer.

Temperature

Charleston International Airport's weather in May shows a rise in the average high-temperature, moving up from April's enjoyable 66.2°F (19°C) to a moderately hot 75.2°F (24°C). A notable decrease from the day's highest temperature marks May, culminating in an average low of 50°F (10°C).

Rainfall

In Charleston International Airport, during May, the rain falls for 13 days and regularly aggregates up to 3.82" (97mm) of precipitation. In Charleston International Airport, during the entire year, the rain falls for 151 days and collects up to 41.93" (1065mm) of precipitation.

Daylight

In May, the average length of the day in Charleston International Airport is 13h and 52min.
On the first day of the month, sunrise is at 6:31 am and sunset at 8:02 pm. On the last day of May, sunrise is at 6:12 am and sunset at 8:23 pm EDT.

Sunshine

The months with the most sunshine are May through August, with an average of 8h of sunshine.

UV index

In Charleston International Airport, the average daily maximum UV index in May is 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 8 in May interprets into the following advice:
Protection is paramount; otherwise, swift harm can come to the skin and eyes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What is the temperature in May in Charleston International Airport?

Charleston International Airport in May has an average high-temperature of 75.2°F (24°C) and an average low-temperature of 50°F (10°C).

How much does it rain in Charleston International Airport in May?

In Charleston International Airport, South Carolina, in May, during 13 rainfall days, 3.82" (97mm) of precipitation is typically accumulated.

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

In May, the average day length in Charleston International Airport is 13h and 52min.

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

In May, on the first day of the month, sunrise is at 6:31 am and sunset at 8:02 pm. On the last day of the month, in Charleston International Airport, sunrise is at 6:12 am and sunset at 8:23 pm EDT.

What is the month with the most sunshine in Charleston International Airport?

May through August, with an average of 8h of sunshine, are months with the most sunshine in Charleston International Airport, South Carolina.

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

In Charleston International Airport, the average sunshine duration in May is 8h.

What is the UV index intensity in May in Charleston International Airport?

In Charleston International Airport, the average daily maximum UV index in May is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to UV radiation.
Average low temperature
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in May
Charleston International Airport, SC

Average temperature in May - Charleston International Airport, SC
  • Average high temperature in May: 75°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 May: 50°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 May
Charleston International Airport, SC

Average rainfall in May - Charleston International Airport, SC
  • Average rainfall in May: 3.8"

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 May
Charleston International Airport, SC

Average rainfall days in May - Charleston International Airport, SC
  • Average rainfall days in May: 13 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 May /
Average sunshine in May
Charleston International Airport, SC

Average daylight in May / Average sunshine in May - Charleston International Airport, SC
  • Average daylight in May: 13h and 5min

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 May: 8h

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 May
Charleston International Airport, SC

Average UV index in May - Charleston International Airport, SC
  • Average UV index in May: 8

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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