May weather forecastSaint Matthews, SC
May
Weather in May
May, the last month of the spring in Saint Matthews, is another warm month, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 81°F (27.2°C).Temperature
The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from 73.8°F (23.2°C) in April to a still moderately hot 81°F (27.2°C). Throughout May, Saint Matthews experiences a low-temperature average of 63.1°F (17.3°C).Heat index
In May, the average heat index is appraised at a tropical 86°F (30°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
The most humid month is May, with an average relative humidity of 76%.Rainfall
In Saint Matthews, during May, the rain falls for 15.3 days and regularly aggregates up to 2.72" (69mm) of precipitation. Throughout the year, there are 159.1 rainfall days, and 29.96" (761mm) of precipitation is accumulated.Snowfall
March through October are months without snowfall.Daylight
In May, the average length of the day is 13h and 55min.On the first day of the month, sunrise is at 6:33 am and sunset at 8:06 pm. On the last day of May, sunrise is at 6:13 am and sunset at 8:28 pm EDT.
Sunshine
In May, the average sunshine is 10h.UV index
In Saint Matthews, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, an average UV index of 6 transforms into the following instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Matthews, SC
- Average high temperature in May: 81°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (53.6°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 (38.5°F).
Average pressure in May
Saint Matthews, SC
- Average pressure in May: 30.02"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Saint Matthews, SC
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in May
Saint Matthews, SC
- Average humidity in May: 76%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in May
Saint Matthews, SC
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in May
Saint Matthews, SC
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in May
Saint Matthews, SC
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in May
Saint Matthews, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.8 days).
The 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
Saint Matthews, SC
- Average daylight in May: 13h and 54min
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: 10h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in May
Saint Matthews, SC
- Average sunshine days in May: 13.6 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is August (9.4 days).
Average UV index in May
Saint Matthews, 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 and December (UV index 3).
Average cloud cover in May
Saint Matthews, SC
- Average cloud cover in May: 33
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in May
Saint Matthews, 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).
