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Sime Lake, TX Weather Forecast
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Sime Lake Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | THURSDAY |
 |  |  | | | | | | | | |
| Mostly Clear | Sunny | Clearing | Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear |
| Lo: 75°FLo: 24°C | Hi: 100°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 100°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°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: 75°FLo: 24°C | Hi: 99°FHi: 37°C Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C Lo: 75°FLo: 24°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 306 PM CDT Thu Aug 20 2026 
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Issued: 1133 PM CDT Thu Aug 20 2026
Key Messages
- An Extreme Heat Warning has been issued for central Louisiana, most of southwest Louisiana and southeast Texas from 10 AM to 8 PM. This is for high temperatures 100 to 105F and/or heat indices 113 to 115F.
- A Heat Advisory will be in effect for all other areas Friday from 10 AM to 8 PM for heat indices up to 112F and high temps 99 to 101F.
- Heat Stress Levels will increase to Extreme (level 4 of 4) for southeast Texas and Louisiana Friday to Monday. Major ...