Weather forecast for: Johnston SC
Last Update: 2:21 am EDT Sep 12, 2026
This Afternoon: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 89. South wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. West wind 3 to 6 mph.
Sunday Night: Mostly clear, with a low around 70. Calm wind.
Monday: Sunny, with a high near 93. North wind 3 to 5 mph.
Monday Night: Mostly clear, with a low around 71.
Tuesday: Mostly sunny, with a high near 88.
Tuesday Night: Mostly clear, with a low around 65.
Wednesday: Sunny, with a high near 88.
Wednesday Night: Clear, with a low around 63.
Thursday: Sunny, with a high near 90.
Thursday Night: Mostly clear, with a low around 66.
Friday: Sunny, with a high near 92.
WeatherWorld.com
