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American Fork Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
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| Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Partly Cloudy | Chance of Showers |
| Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 100°FHi: 38°C | Lo: 70°FLo: 21°C | Hi: 99°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C | Lo: 65°FLo: 18°C |
| POP: 20% | POP: 40% | POP: 30% | POP: 40% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1243 AM MDT Wed Aug 19 2026 
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Issued: 1254 PM MDT Wed Aug 19 2026
Key Messages
.KEY MESSAGES, Issued 1033 PM MDT Tue Aug 18 2026...- Building high pressure will bring a steady warming trend in temperatures through Thursday as conditions dry.
- Monsoon moisture will move back into Utah and southwest Wyoming late in the week, persisting through at least early next week. This will bring an increased threat of showers and thunderstorms capable of producing flash flooding.
Discussion
, Issued 1033 PM MDT Tue Aug 18 2026... High pressure cent...