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Town of Fort Mill, South CarolinaFort Mill, SC Weather Forecast
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Fort Mill Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  | |  | |  |  | |  | |  | |
| Chance of T-Storm | Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny |
| Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C |
| POP: 40% | POP: 40% | POP: 60% | POP: 80% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 722 PM EDT Sun Sep 20 2026 
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Instant definitions for any meteorological term.
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Issued: 754 PM EDT Sun Sep 20 2026
Key Messages
1. A few severe thunderstorms will be possible Monday and Tuesday, mainly in the late afternoon and early evening. The main concern will be damaging wind gusts and excessive rainfall. 2. A cool-down will finally happen during the middle of the week that should persist into the next weekend, with temperatures switching to 5-10 degrees below normal.
Discussion
... Key message 1: A few severe thunderstorms will be possible Monday and Tuesday, mainly in the late afternoon and early evening...