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Mount Vernon Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  | |  |  | |  | | | | | |
| Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Sunny |
| Lo: 70°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 70°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: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C |
| POP: 70% | POP: 70% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 728 PM EDT Thu Sep 10 2026 
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Issued: 727 PM EDT Thu Sep 10 2026
Key Messages
1. Quiet weather before daily shower and thunderstorm chances return Friday into early next week. Humidity and above normal temperatures remain through at least Monday.
Discussion
... Key message 1: Quiet weather before daily shower and thunderstorm chances return Friday into early next week. Humidity and above normal temperatures remain through at least Monday.
Generally quiet weather as upper flow remains flat with weak surface high pressure over the southeast. By Friday, a frontal bo...