May weather forecast
Ulmer, SC

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Weather in May

The last month of the spring, May, is also a moderately hot month in Ulmer, South Carolina, with an average temperature ranging between max 81.7°F (27.6°C) and min 64°F (17.8°C).

Temperature

The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from 75°F (23.9°C) in April to a still warm 81.7°F (27.6°C). Ulmer experiences an average low-temperature of 64°F (17.8°C) in month of May.

Heat index

Throughout May, the heat index is estimated at a tropical 86°F (30°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.

Humidity

The average relative humidity in May is 75%.

Rainfall

In Ulmer, during May, the rain falls for 14.6 days and regularly aggregates up to 2.8" (71mm) of precipitation. Throughout the year, there are 152.9 rainfall days, and 31.18" (792mm) of precipitation is accumulated.

Snowfall

March through December are months without snowfall.

Daylight

In May, the average length of the day is 13h and 53min.
On the first day of the month, sunrise is at 6:36 am and sunset at 8:07 pm. On the last day of May, sunrise is at 6:16 am and sunset at 8:28 pm EDT.

Sunshine

In May, the average sunshine is 9.9h.

UV index

The average daily maximum UV index in May in Ulmer is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 6 in May suggests the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

The average high-temperature, in May, in Ulmer, is 81.7°F (27.6°C), while the average low-temperature is 64°F (17.8°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in May is estimated at 86°F (30°C).

What is the average humidity in May in Ulmer?

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

How many days does it rain in May?

In May, the rain falls for 14.6 days. Throughout May, 2.8" (71mm) of precipitation is accumulated.

When it does not snow?

In Ulmer, snow does not fall in March through December.

How many hours of daylight does Ulmer have in May?

The average day length in May is 13h and 53min.

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 6:36 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 8:28 pm EDT.

How many hours of sunshine does Ulmer have in May?

In Ulmer, the average sunshine duration in May is 9.9h.

What is the UV index intensity in May?

In May, the average daily maximum UV index in Ulmer is 6. A UV Index reading of 6 to 7 represents a high health vulnerability 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
Ulmer, SC

Average temperature in May - Ulmer, SC
  • Average high temperature in May: 81.7°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (55.4°F).

  • Average low temperature in May: 64°F

The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).

Average pressure in May
Ulmer, SC

Average pressure in May - Ulmer, SC
  • Average pressure in May: 30.02"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).

Average wind speed in May
Ulmer, SC

Average wind speed in May - Ulmer, SC
  • Average wind speed in May: 6.7mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in May
Ulmer, SC

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

The months with the highest relative humidity are August and December (76%).
The month with the lowest relative humidity is January (70%).

Average rainfall in May
Ulmer, SC

Average rainfall in May - Ulmer, SC
  • Average rainfall in May: 2.8"

The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is November (1.38").

Average rainfall days in May
Ulmer, SC

Average rainfall days in May - Ulmer, SC
  • Average rainfall days in May: 14.6 days

The month with the highest number of rainy days is August (20.8 days).
The month with the least rainy days is November (6.6 days).

Average snowfall in May
Ulmer, SC

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

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

Average snowfall days in May
Ulmer, SC

Average snowfall days in May - Ulmer, 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 March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in May / Average sunshine in May - Ulmer, 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: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in May
Ulmer, SC

Average sunshine days in May - Ulmer, SC
  • Average sunshine days in May: 14.5 days

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is August (7.3 days).

Average UV index in May
Ulmer, SC

Average UV index in May - Ulmer, 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).

Average cloud cover in May
Ulmer, SC

Average cloud cover in May - Ulmer, SC
  • Average cloud cover in May: 34

The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in May
Ulmer, SC

Average visibility in May - Ulmer, 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).

Ulmer, South Carolina, USA

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