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Johnston Weather Forecast
Johnston, SC Weather Forecast Date: 308 AM EDT Thu Sep 10 2026
Weather forecast for Johnston, SC
Today Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Today... Patchy fog this morning. Mostly sunny. Highs in the lower 90s. Light and variable winds, becoming southwest around 5 mph this afternoon. |
Fri Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Friday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds around 5 mph. Chance of rain 50%. |
| Sat Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Saturday... Partly sunny with a chance of showers and thunderstorms in the morning, then mostly cloudy with showers and thunderstorms likely in the afternoon. Humid with highs in the lower 90s. Southwest winds around 5 mph. Chance of rain 70%. |
| Sun Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Sunday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40%. |
Mon Hi: 91°FHi: 33°C Lo: 70°F Lo: 21°C |
Monday... Mostly sunny. Highs in the lower 90s. |
| Tue Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
Tuesday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30%. |
| Wed Hi: 91°FHi: 33°C |
Wednesday... Mostly sunny. Highs in the lower 90s. |
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