May weather forecast and climate
Piedmont, SC

May, the last month of the spring, in Piedmont, is a warm month, with average temperature fluctuating between 78.4°F (25.8°C) and 57.7°F (14.3°C).

Temperature

In May, the average high-temperature marginally rises, from an agreeable 70.5°F (21.4°C) in April, to a moderately hot 78.4°F (25.8°C). In May, in Piedmont, the average low-temperature is 57.7°F (14.3°C).

Humidity

In May, the average relative humidity in Piedmont is 75%.

Rainfall

In May, in Piedmont, the rain falls for 15.3 days. Throughout May, 3.15" (80mm) of precipitation is accumulated. In Piedmont, during the entire year, the rain falls for 150.6 days and collects up to 32.64" (829mm) of precipitation.

Snowfall

April through October are months without snowfall in Piedmont.

Daylight

The average length of the day in May is 14h.

Sunshine

In May, the average sunshine is 10h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Piedmont. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in May in Piedmont?

In May, the average high-temperature is 78.4°F (25.8°C), and the average low-temperature is 57.7°F (14.3°C).

What is the average humidity in May in Piedmont?

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

How many days does it rain in May in Piedmont?

In Piedmont, in May, it is raining for 15.3 days, with typically 3.15" (80mm) of accumulated precipitation.

When it does not snow in Piedmont?

In Piedmont, South Carolina, snow does not fall in April through October.

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

In Piedmont, the average length of the day in May is 14h.

How long on average sun shines in May in Piedmont?

The average sunshine in May in Piedmont is 10h.

What are the months with the highest UV index in Piedmont?

Months with the highest UV index in Piedmont are May through August, with an average maximum UV index of 6.

What is the UV index reading in May in Piedmont?

In Piedmont, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in May - Piedmont, SC
  • Average high temperature in May: 78.4°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (49.3°F).

  • Average low temperature in May: 57.7°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).

Average pressure in May - Piedmont, SC
  • Average pressure in May: 30.03"

The month with the highest atmospheric pressure is November (30.15").
The month with the lowest atmospheric pressure is June (29.99").

Average wind speed in May - Piedmont, SC
  • Average wind speed in May: 5.3mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).

Average rainfall in May - Piedmont, SC
  • Average rainfall in May: 3.15"

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.38").

Average rainfall days in May - Piedmont, SC
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is November (7.8 days).

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

The month with the highest snowfall is December (2.01").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

Months with the highest number of snowfall days are January and February (1 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Piedmont, SC
  • Average daylight in May: 14h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in May: 10h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 5.5h).

Average sunshine days in May - Piedmont, SC
  • Average sunshine days in May: 13.8 days

The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (11.5 days).

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

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in May - Piedmont, SC
  • Average cloud cover in May: 33

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).

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

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