Weather WorldMount Summit, IN Weather Forecast
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Mount Summit Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  |  |  | | | | |  |  | |
| Mostly Clear | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of T-Storm |
| Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C |
| POP: 40% | POP: 100% | POP: 70% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 603 PM EDT Mon Sep 07 2026 
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Issued: 653 PM EDT Mon Sep 7 2026
Key Messages
- Sunny and Warmer on Tuesday.
- Brief return of heat midweek with a chance of storms Late Wednesday Afternoon into Thursday.
Discussion
(This evening through Monday)... Issued at 227 PM EDT Mon Sep 7 2026
Surface analysis this afternoon shows strong high pressure in place over Lake Huron, providing easterly surface flow to Central Indiana. Aloft, strong ridging was in place over the upper midwest, resulting in NW flow across Indiana. Water Vapor imagery shows subsidence in place across Ind...