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Johnson Lake, SC Weather Forecast
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Johnson Lake Weather Forecast
| REST OF TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 | |  |  |  |  | |  | | | | |
| Patchy Fog | Patchy Fog | Clear | Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear |
| Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 90°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C Lo: 70°FLo: 21°C |
| POP: 70% | POP: 70% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 222 AM EDT Fri Sep 04 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 218 AM EDT Fri Sep 4 2026
Key Messages
1) Well above normal temperatures and humidity will bring triple digit heat indices again today and Saturday. A Heat Advisory is in effect today.
2) A cold front will bring showers and thunderstorms this weekend, followed by cooler temperatures early next week.
Discussion
... KEY MESSAGE 1...Well above normal temperatures and humidity will bring triple digit heat indices again today and Saturday. A Heat Advisory is in effect today.
The powerful mid and upper level ridge will spend one mo...