weather myrtle be
Guide to Myrtle Beach weather in May. The average maximum daytime temperature in Myrtle Beach in May is a warm 28Â°C (82Â°F) with low heat & humidity. The average night-time temperature is usually a comfortable 15Â°C (59Â°F). There are usually 9 hours of bright sunshine each day, which represents 67% of the 14 hours of daylight.