The climate in 29455 Johns Island, SC is generally mild and humid throughout the year. Summers are hot and humid with temperatures averaging around 90 degrees Fahrenheit (32 degrees Celsius) during the day and mid-70s at night. Winter temperatures are much cooler, usually ranging from the mid-40s to low-50s Fahrenheit (7 to 10 degrees Celsius). Precipitation is common year round with an average of 48 inches (122 cm) annually. Snowfall is rare and summer thunderstorms can occur, but rarely last for more than a few hours. Overall, this area enjoys a temperate climate that allows for a long growing season and plenty of outdoor activities throughout the year.
Johns Island (zip 29455), South Carolina gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Johns Island (zip 29455) averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 211 sunny days per year in Johns Island (zip 29455). The US average is 205 sunny days.
Johns Island (zip 29455) gets some kind of precipitation, on average, 106 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 90 degrees
Winter Low: the January low is 39
Rain: averages 48 inches of rain a year
Snow: averages 0 inches of snow a year