Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The start of May is characterized by a subtle increase in the average high-temperature, transitioning from 73.8°F (23.2°C) in April to a still moderately hot 81.1°F (27.3°C). Throughout May, an average low-temperature of 63.1°F (17.3°C) is expected in Swansea, South Carolina.Heat index
For most parts of May, the heat index is estimated at a tropical 86°F (30°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.One should consider that heat index numbers are for shaded settings and light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 are highly critical for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In May, the average relative humidity in Swansea is 74%.Rainfall
In Swansea, South Carolina, in May, it is raining for 15.8 days, with typically 3.03" (77mm) of accumulated precipitation. Throughout the year, there are 166.8 rainfall days, and 32.56" (827mm) of precipitation is accumulated.Snowfall
In Swansea, snow does not fall in April through November.Daylight
In Swansea, the average length of the day in May is 13h and 55min.On the first day of the month, sunrise is at 6:34 am and sunset at 8:08 pm. On the last day of May, sunrise is at 6:14 am and sunset at 8:29 pm EDT.
Sunshine
In Swansea, the average sunshine in May is 9.9h.UV index
In May, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 6 suggests these recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Swansea in May?
What is the average humidity in May in Swansea?
How much does it rain in Swansea in May?
When it does not snow in Swansea?
How many hours of daylight does Swansea have in May?
What time are sunrise and sunset in May in Swansea?
How long on average sun shines in May in Swansea?
How high is the UV index in May in Swansea?
Average temperature in May
Swansea, SC
- Average high temperature in May: 81.1°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in May: 63.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).
Average pressure in May
Swansea, SC
- Average pressure in May: 30.02"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Swansea, SC
- Average wind speed in May: 7.2mph
The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in May
Swansea, SC
- Average humidity in May: 74%
The month with the highest relative humidity is December (75%).
The months with the lowest relative humidity are January and November (70%).
Average rainfall in May
Swansea, SC
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is December (3.86").
The driest months (with the least rainfall) are September and November (2.01").
Average rainfall days in May
Swansea, SC
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is July (19.9 days).
The months with the least rainy days are October and November (9 days).
Average snowfall in May
Swansea, SC
- Average snowfall in May: 0"
The months with the highest snowfall are January and February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Swansea, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
Swansea, SC
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
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 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in May
Swansea, SC
- Average sunshine days in May: 13.4 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.4 days).
Average UV index in May
Swansea, SC
- Average UV index in May: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in May
Swansea, SC
- Average cloud cover in May: 33
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 28).
Average visibility in May
Swansea, 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).
Swansea, South Carolina, USA
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