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Magna Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Mostly Clear | Mostly Clear | Partly Cloudy |
| Lo: 55°FLo: 13°C | Hi: 70°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 60°FLo: 16°C |
| POP: 80% | POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1250 PM MDT Fri Sep 18 2026 
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Issued: 1226 PM MDT Fri Sep 18 2026
Key Messages
.KEY MESSAGES, Issued 1110 AM MDT Fri Sep 18 2026...- Periods of showers and thunderstorms will continue tonight into Friday, with the best coverage over northern Utah and southwest Wyoming. Hail, heavy rain, and lightning will be the primarily threats. Flash flooding remains a threat as well.
- A weak cold front will bring drier conditions with more seasonable temperatures Saturday through the remainder of the weekend.
- Moisture is expected to increase again Tuesday, with another period...