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Johnston County, OK Weather Forecast
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Johnston County Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  | |  |  | | | |  | |  | |
| Mostly Clear | Sunny | Clear | Chance of T-Storm | Chance of Showers | Mostly Sunny | Clear | Sunny | Partly Cloudy | Mostly Sunny | Chance of Showers | Sunny |
| Lo: 75°FLo: 24°C | Hi: 101°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 100°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C |
| POP: 70% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 743 PM CDT Tue Sep 08 2026 
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Issued: 631 PM CDT Tue Sep 8 2026
Key Messages
Updated at 626 PM CDT Tue Sep 8 2026- Ongoing heatwave continues through Wednesday with triple digit heat indices and lows well above normal.
- Cooler temperatures and scattered to numerous storms expected late Wednesday into Thursday. Strong to severe storms possible across northern Oklahoma Wednesday afternoon and evening.
- Heat tries to rebound this weekend with low rain chances each day.
Aviation
... (00Z TAFS) Issued at 630 PM CDT Tue Sep 8 2026
VFR conditions are expected through at l...