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City of Newcastle, TXNewcastle, TX Weather Forecast
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| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | | | | | | | | |  |  |
| Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm |
| Hi: 102°FHi: 39°C | Lo: 79°FLo: 26°C | Hi: 100°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 101°FHi: 38°C | Lo: 75°FLo: 24°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 | Lo: 69°FLo: 21°C |
| POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 553 AM CDT Sun Sep 13 2026 
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Issued: 528 AM CDT Sun Sep 13 2026
Key Messages
- A Heat Advisory is in effect for most of North and Central Texas this afternoon. Heat indices of up to 106 can be expected.
- Hot and dry conditions will continue into the upcoming work week.
Aviation
... (12Z TAFS) Issued at 507 AM CDT Sun Sep 13 2026
KACT: While a few, ragged low clouds continue to develop across the Hill Country as of 1000Z, SSE flow trajectories at 1 kft per the KGRK VAD have taken them east into Limestone County. Regardless, coverage wouldn`t warrant IFR as it stands...