10-Day Weather Forecast - Johnston, SC

Mostly cloudy. Patchy fog in the morning. A chance of rain in the afternoon. Highs in the upper 70s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent.

Rain in the evening. Cooler with lows in the mid 40s. West winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 80 percent.

Mostly sunny. Much cooler with highs in the mid 50s. Northwest winds 10 to 15 mph with gusts up to 30 mph.

Mostly clear. Cooler with lows in the upper 20s.

Mostly sunny. Highs in the lower 50s.

Mostly clear. Lows in the upper 20s.

Sunny. Highs in the upper 50s.

Mostly clear in the evening then becoming mostly cloudy. Lows in the upper 30s.

Partly sunny. Highs in the upper 50s.

Mostly cloudy. Lows in the upper 30s.

Partly sunny. A chance of rain in the morning. Highs in the lower 50s. Chance of rain 30 percent.

Clear. Low temperature around 31F. Dew point will be around 24F with an average humidity of 64%. Winds will be 4 mph from the NW.

Sunny. High temperature around 52F. Dew point will be around 26F with an average humidity of 54%. Winds will be 5 mph from the SW.

Clear. Low temperature around 34F. Dew point will be around 28F with an average humidity of 67%. Winds will be 3 mph from the SW.

Partly cloudy. High temperature around 52F. Dew point will be around 33F with an average humidity of 62%. Winds will be 4 mph from the SW.

Partly cloudy. Low temperature around 37F. Dew point will be around 35F with an average humidity of 76%. Winds will be 4 mph from the W.

Partly cloudy. High temperature around 48F. Dew point will be around 31F with an average humidity of 63%. Winds will be 6 mph from the W.

Clear. Low temperature around 30F. Dew point will be around 26F with an average humidity of 67%. Winds will be 4 mph from the NW.