May weather forecast
Runnymede, SC

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Weather in May

The last month of the spring, May, is another warm month in Runnymede, South Carolina, with an average temperature fluctuating between 66°F (18.9°C) and 81.3°F (27.4°C).

Temperature

The shift into May is marked by a modest rise in the average high-temperature, moving from April's 74.8°F (23.8°C) to a still warm 81.3°F (27.4°C). An average low-temperature of 66°F (18.9°C) is noted in Runnymede during the month of May.

Heat index

May's heat index is calculated to be a tropical 86°F (30°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In Runnymede, South Carolina, the average relative humidity in May is 75%.

Rainfall

In Runnymede, in May, it is raining for 15.6 days, with typically 2.95" (75mm) of accumulated precipitation. In Runnymede, South Carolina, during the entire year, the rain falls for 172.6 days and collects up to 39.13" (994mm) of precipitation.

Snowfall

March through November are months without snowfall in Runnymede.

Daylight

The average length of the day in May is 13h and 52min.
On the first day of the month, sunrise is at 6:32 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

In Runnymede, South Carolina, the average sunshine in May is 10.2h.

UV index

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 the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What is the temperature in May in Runnymede?

Runnymede in May has an average high-temperature of 81.3°F (27.4°C) and an average low-temperature of 66°F (18.9°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in May is calculated to be 86°F (30°C).

What is the average humidity in May in Runnymede?

The average relative humidity in May in Runnymede is 75%.

How much does it rain in Runnymede in May?

In Runnymede, South Carolina, in May, during 15.6 rainfall days, 2.95" (75mm) of precipitation is typically accumulated.

When it does not snow in Runnymede?

In Runnymede, South Carolina, snow does not fall in March through November.

What is the average length of the day in May in Runnymede?

The average day length in May in Runnymede, South Carolina, is 13h and 52min.

When are sunrise and sunset in May in Runnymede?

On the first day of May in Runnymede, sunrise is at 6:32 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:23 pm EDT.

How many hours of sunshine does Runnymede have in May?

The average sunshine duration in May is 10.2h.

What is the UV index reading in May in Runnymede?

In May, the average daily maximum UV index in Runnymede, South Carolina, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
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
Runnymede, SC

Average temperature in May - Runnymede, SC
  • Average high temperature in May: 81.3°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (56.8°F).

  • Average low temperature in May: 66°F

The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in May
Runnymede, SC

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).

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Average wind speed in May
Runnymede, SC

Average wind speed in May - Runnymede, SC
  • Average wind speed in May: 6.9mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in May
Runnymede, SC

Average humidity in May - Runnymede, SC
  • Average humidity in May: 75%

The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January and March (72%).

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Average rainfall in May
Runnymede, SC

Average rainfall in May - Runnymede, SC
  • Average rainfall in May: 2.95"

The wettest month (with the highest rainfall) is August (6.22").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in May
Runnymede, SC

Average rainfall days in May - Runnymede, SC
  • Average rainfall days in May: 15.6 days

The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is November (8.2 days).

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Average snowfall in May
Runnymede, SC

Average snowfall in May - Runnymede, SC
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Runnymede, SC

Average snowfall days in May - Runnymede, SC
  • Average snowfall days in May: 0 days

The months with the highest number of snowfall days are January and February (0.3 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
Runnymede, SC

Average daylight in May / Average sunshine in May - Runnymede, 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 36min).

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Average sunshine days in May
Runnymede, SC

Average sunshine days in May - Runnymede, SC
  • Average sunshine days in May: 12.9 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is August (5.8 days).

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Average UV index in May
Runnymede, SC

Average UV index in May - Runnymede, SC
  • Average UV index in May: 6

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

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Average cloud cover in May
Runnymede, SC

Average cloud cover in May - Runnymede, SC
  • Average cloud cover in May: 31

The month with the most cloud cover is December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 27).

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Average visibility in May
Runnymede, SC

Average visibility in May - Runnymede, SC
  • Average visibility in May: 6mi

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

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Runnymede, South Carolina, USA

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