Johnston, SC Weather
Johnston, SC climate is warm during summer when temperatures tend to be in the 70's and cold during winter when temperatures tend to be in the 40's.
The warmest month of the year is July with an average maximum temperature of 91.80 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 28.80 degrees Fahrenheit.
Temperature variations between night and day tend to be moderate during summer with a difference that can reach 25 degrees Fahrenheit, and moderate during winter with an average difference of 27 degrees Fahrenheit.
The annual average precipitation at Johnston is 48.65 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is January with an average rainfall of 5.12 Inches.
Moon, Sunrise and Sunset
|Moon Phase: Waxing Gibbous Moon||Civil Twilight:
5:47 AM EDT
6:16 AM EDT
8:40 PM EDT
9:09 PM EDT