May weather forecast
Cainhoy, SC

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Weather in May

May sets the groundwork for the impending hot summer season in Cainhoy, South Carolina. It sees another dramatic rise in temperatures, as the daytime high goes up to 79°F (26.1°C). May is also noticeably relentless in terms of the rainfall with a high of 3.23" (82mm), making it the wettest month since the year's start. Nevertheless, more sunshine and longer daylight hours lighten up the mood and skies, regardless of the occasional showers.

Temperature

With the onset of May, the average high-temperature subtly transitions from a pleasant 72.1°F (22.3°C) in April to a warm 79°F (26.1°C). Nighttime temperature in Cainhoy experiences an average drop to a pleasant 68.5°F (20.3°C) in May.

Humidity

In May, the average relative humidity in Cainhoy is 76%.

Rainfall

In Cainhoy, in May, during 16.5 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. In Cainhoy, South Carolina, during the entire year, the rain falls for 182.9 days and collects up to 44.69" (1135mm) of precipitation.

Snowfall

In Cainhoy, snow does not fall in January, March through November.

Daylight

In May, the average length of the day is 13h and 52min.
On the first day of the month, sunrise is at 6:31 am and sunset at 8:01 pm. On the last day of May, in Cainhoy, sunrise is at 6:11 am and sunset at 8:22 pm EDT.

Sunshine

In Cainhoy, the average sunshine in May is 10.4h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 7 in May interprets into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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Frequently asked questions

What is the average May temperature in Cainhoy?

During May, Cainhoy experiences an average high-temperature of 79°F (26.1°C) and a low-temperature of 68.5°F (20.3°C).

What is the average humidity in May in Cainhoy?

In May, the average relative humidity is 76%.

How many days does it rain in May in Cainhoy?

In Cainhoy, in May, during 16.5 rainfall days, 3.23" (82mm) of precipitation is typically accumulated.

When it does not snow in Cainhoy?

January, March through November are months without snowfall in Cainhoy.

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

In Cainhoy, South Carolina, the average day length in May is 13h and 52min.

When is the sunrise / sunset in May in Cainhoy?

In May, on the first day of the month, sunrise is at 6:31 am and sunset at 8:01 pm. On the last day of the month, in Cainhoy, sunrise is at 6:11 am and sunset at 8:22 pm EDT.

How many hours of sunshine does Cainhoy have in May?

The average sunshine duration in May is 10.4h.

What is the month with the highest UV index in Cainhoy?

The months with the highest UV index are May through August, with an average maximum UV index of 7.

What is the UV index intensity in May in Cainhoy?

The average daily maximum UV index in May in Cainhoy is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's 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
Cainhoy, SC

Average temperature in May - Cainhoy, SC
  • Average high temperature in May: 79°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.2°F).

  • Average low temperature in May: 68.5°F

The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).

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Average pressure in May
Cainhoy, SC

Average pressure in May - Cainhoy, 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 (29.98"Hg).

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Average wind speed in May
Cainhoy, SC

Average wind speed in May - Cainhoy, SC
  • Average wind speed in May: 8.9mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

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Average humidity in May
Cainhoy, SC

Average humidity in May - Cainhoy, SC
  • Average humidity in May: 76%

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).

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Average rainfall in May
Cainhoy, SC

Average rainfall in May - Cainhoy, SC
  • Average rainfall in May: 3.23"

The wettest month (with the highest rainfall) is August (8.03").
The driest month (with the least rainfall) is January (1.38").

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Average rainfall days in May
Cainhoy, SC

Average rainfall days in May - Cainhoy, SC
  • Average rainfall days in May: 16.5 days

The month with the highest number of rainy days is August (25.8 days).
The month with the least rainy days is November (8.6 days).

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Average snowfall in May
Cainhoy, SC

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

The month with the highest snowfall is December (0.5").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Cainhoy, SC

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

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in May /
Average sunshine in May
Cainhoy, SC

Average daylight in May / Average sunshine in May - Cainhoy, 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 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in May
Cainhoy, SC

Average sunshine days in May - Cainhoy, SC
  • Average sunshine days in May: 12.3 days

The months with the most sunshine days are January and November (19.3 days).
The month with the least sunshine days is August (3 days).

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Average UV index in May
Cainhoy, SC

Average UV index in May - Cainhoy, SC
  • Average UV index in May: 7

The months with the highest UV index are May, 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
Cainhoy, SC

Average cloud cover in May - Cainhoy, SC
  • Average cloud cover in May: 27

The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 26).

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Average visibility in May
Cainhoy, SC

Average visibility in May - Cainhoy, 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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Cainhoy, South Carolina, USA

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