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KOA Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
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| Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Clearing | Mostly Clear | Partly Cloudy | Mostly Clear |
| Hi: 102°FHi: 39°C | Lo: 79°FLo: 26°C | Hi: 104°FHi: 40°C | Lo: 79°FLo: 26°C | Hi: 104°FHi: 40°C | Lo: 79°FLo: 26°C | Hi: 103°FHi: 39°C | Lo: 79°FLo: 26°C | Hi: 103°FHi: 39°C | Lo: 79°FLo: 26°C | Hi: 103°FHi: 39°C | Lo: 75°FLo: 24°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 323 AM CDT Thu Sep 10 2026 
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Issued: 646 AM CDT Thu Sep 10 2026
Key Messages
Issued at 643 AM CDT Thu Sep 10 2026- Moderate to occasionally Extreme risk of heat-related impacts through Friday with an increased Extreme risk across a large portion of South Texas this weekend.
- Low to medium rain chances through Friday, then low to very low chances by the weekend and into next week.
- Elevated Fire Weather conditions possible Friday-Monday across the Brush Country.
Discussion
... Issued at 126 AM CDT Thu Sep 10 2026
Wednesday turned out to be more active than anticipat...