May weather forecast
Round O, SC

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Weather in May

The last month of the spring, May, is also a moderately hot month in Round O, South Carolina, with an average temperature fluctuating between 64.2°F (17.9°C) and 82.8°F (28.2°C).

Temperature

In Round O, stepping into May brings a gentle temperature nudge, moving slightly up from April's moderately hot 75.7°F (24.3°C) to a still warm 82.8°F (28.2°C). During the nights in May, Round O experiences a consistent average temperature of 64.2°F (17.9°C).

Heat index

May's mean heat index is evaluated at a tropical 89.6°F (32°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.
Understanding the heat index involves considering values for shaded locales with light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

The average relative humidity in May in Round O is 75%.

Rainfall

In Round O, during May, the rain falls for 14.4 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, in Round O, there are 149.7 rainfall days, and 21.5" (546mm) of precipitation is accumulated.

Snowfall

In Round O, snow does not fall in March through December.

Daylight

The average length of the day in May is 13h and 52min.
On the first day of the month, sunrise is at 6:33 am and sunset at 8:04 pm. On the last day of May, in Round O, sunrise is at 6:14 am and sunset at 8:25 pm EDT.

Sunshine

The average sunshine in May in Round O is 10.1h.

UV index

In May, the average daily maximum UV index in Round O is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 6 during May translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Feb 13, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

Is it hot in Round O during May?

In Round O, 82.8°F (28.2°C) is the average high-temperature and 64.2°F (17.9°C) is the average low-temperature during May. In May, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 89.6°F (32°C).

What is the average humidity in May in Round O?

The average relative humidity in May in Round O, South Carolina, is 75%.

How much does it rain in Round O in May?

In Round O, in May, it is raining for 14.4 days, with typically 1.61" (41mm) of accumulated precipitation.

When it does not snow in Round O?

March through December are months without snowfall in Round O, South Carolina.

How many hours of daylight does Round O have in May?

The average day length in May is 13h and 52min.

What time are sunrise and sunset in May in Round O?

In May, on the first day of the month, sunrise is at 6:33 am and sunset at 8:04 pm. On the last day of the month, in Round O, sunrise is at 6:14 am and sunset at 8:25 pm EDT.

How long on average sun shines in May in Round O?

In May, the average sunshine duration in Round O, South Carolina, is 10.1h.

How high is the UV index in May in Round O?

In Round O, South Carolina, the average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Round O, SC

Average temperature in May - Round O, SC
  • Average high temperature in May: 82.8°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (56.1°F).

  • Average low temperature in May: 64.2°F

The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).

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Average pressure in May
Round O, SC

Average pressure in May - Round O, SC
  • Average pressure in May: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in May
Round O, SC

Average wind speed in May - Round O, SC
  • Average wind speed in May: 6mph

The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in May
Round O, SC

Average humidity in May - Round O, SC
  • Average humidity in May: 75%

The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are January, March and November (72%).

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Average rainfall in May
Round O, SC

Average rainfall in May - Round O, SC
  • Average rainfall in May: 1.61"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is November (0.75").

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Average rainfall days in May
Round O, SC

Average rainfall days in May - Round O, SC
  • Average rainfall days in May: 14.4 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (6.2 days).

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Average snowfall in May
Round O, SC

Average snowfall in May - Round O, SC
  • Average snowfall in May: 0"

The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in May
Round O, SC

Average snowfall days in May - Round O, SC
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Round O, SC

Average daylight in May / Average sunshine in May - Round O, 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: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in May
Round O, SC

Average sunshine days in May - Round O, SC
  • Average sunshine days in May: 14.2 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (6.9 days).

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Average UV index in May
Round O, SC

Average UV index in May - Round O, SC
  • Average UV index in May: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in May
Round O, SC

Average cloud cover in May - Round O, SC
  • Average cloud cover in May: 34

The month with the most cloud cover is December (Cloud cover 42).
The months with the least cloud cover are July and October (Cloud cover 29).

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Average visibility in May
Round O, SC

Average visibility in May - Round O, SC
  • Average visibility in May: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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Round O, South Carolina, USA

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