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Tecumseh Lake, OK Weather Forecast
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Tecumseh Lake Weather Forecast
| REST OF TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  | |  |  | | | | | | |
| Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Mostly Sunny | Chance of T-Storm | Mostly Sunny | Mostly Clear | Sunny | Chance of T-Storm | Chance of T-Storm |
| Lo: 75°FLo: 24°C | Hi: 104°FHi: 40°C | Lo: 75°FLo: 24°C | Hi: 104°FHi: 40°C | Lo: 75°FLo: 24°C | Hi: 100°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 103°FHi: 39°C | Lo: 79°FLo: 26°C | Hi: 103°FHi: 39°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1213 AM CDT Fri Aug 21 2026 
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Issued: 135 AM CDT Fri Aug 21 2026
Key Messages
Updated at 125 AM CDT Fri Aug 21 2026- Excessive heat continues through the weekend and into next week.
- Isolated rain/storms are possible most days.
Aviation
... (06Z TAFS) Issued at 1005 PM CDT Thu Aug 20 2026
Predominately VFR conditions are expected during the upcoming period, though will still carry low/scattered mentions of rain and storms into Friday. For now, the most "likely" periods are across northern Oklahoma after 08Z and again by the early eveni...