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Arn School Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  | |  |  | |  | |  |  | |
| Partly Cloudy | Cloudy | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy | Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Mostly Cloudy |
| Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C |
| POP: 50% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 352 AM EDT Fri Sep 18 2026 
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Issued: 421 AM EDT Fri Sep 18 2026
Key Messages
- Dry weather today with increasing clouds late in the day.
- Several rounds of showers and embedded thunderstorms are likely Saturday, Saturday night, and Sunday.
- A cool and cloudy pattern is expected through early next week.
Discussion
...
A stalled frontal boundary remains active with convection across the Ohio Valley this morning but SE MI will see increasing drying influence from high pressure passing through northern Ontario today. Northeast flow allows remaining stratus to push south...