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City of Simpsonville, South CarolinaSimpsonville, SC Weather Forecast
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| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Sunny |
| Lo: 70°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C |
| POP: 40% | POP: 50% | POP: 50% | POP: 40% | POP: 40% | POP: 50% | POP: 70% | POP: 70% | POP: 70% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 411 PM EDT Fri Sep 18 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 255 PM EDT Fri Sep 18 2026
Key Messages
1. A cold front dropping down slowly from the north may trigger a few severe thunderstorms during the afternoon and evening, and again over the western half of the forecast area on Saturday afternoon and evening. Otherwise, this afternoon should be the last really hot day for the next week. 2. A shift in the upper pattern will finally bring some cool weather right on schedule for the start of autumn.
Discussion
... Key message 1: A cold front dropping down slowly from the north may tri...