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Sumner County Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT |
 |  | | | | |  |  | | | |  |
| Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Mostly Clear | Sunny | Partly Cloudy |
| Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 70°FLo: 21°C |
| POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 458 AM CDT Wed Sep 02 2026 
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Issued: 1217 PM CDT Wed Sep 2 2026
Key Messages
Updated at 1215 PM CDT Wed Sep 2 2026- A Heat Advisory is in effect for all counties through Friday.
- Major to extreme heat risk this week with heat index values in the triple digits. Wednesday and Thursday are expected to be the hottest days of the week.
- Low rain chances return this weekend into early next week.
Aviation
... (18Z TAFS) Issued at 1215 PM CDT Wed Sep 2 2026
VFR forecast continues due to upper level ridging over the TN Valley. Did add some patchy fog overnight for the two s...