| National Weather Service Forecast for:
Plano, TX Issued by: National Weather Service Fort Worth/Dallas, TX |
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| Updated: 08/20/2026 10:51am | ||||||||||||||||||||||||||||||||||||||||
| Plano, Collin County, Texas | ||||||||||||||||||||||||||||||||||||||||
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Extreme Heat Warning issued August 20 at 11:53AM CDT until August 21 at 8:00PM CDT
| Today |
Sunny, with a high near 104. Heat index values as high as 107. South southwest wind 5 to 10 mph. |
| Tonight |
A slight chance of showers and thunderstorms between 7pm and 10pm. Mostly clear. Low around 82, with temperatures rising to around 85 overnight. Heat index values as high as 106. South wind around 5 mph. |
| Friday |
A slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 105. Heat index values as high as 109. South southwest wind around 5 mph. Chance of precipitation is 20%. |
| Friday Night |
A slight chance of showers and thunderstorms before 10pm. Partly cloudy. Low around 82, with temperatures rising to around 84 overnight. Heat index values as high as 108. South southeast wind around 5 mph. Chance of precipitation is 20%. |
| Saturday |
Sunny, with a high near 106. South southwest wind around 5 mph. |
| Saturday Night |
Mostly clear. Low around 81, with temperatures rising to around 84 overnight. South southwest wind 5 to 10 mph. |
| Sunday |
Sunny, with a high near 105. South southwest wind around 5 mph. |
| Sunday Night |
Mostly clear, with a low around 82. South southeast wind around 10 mph. |
| Monday |
Sunny, with a high near 104. South southwest wind around 10 mph. |
| Monday Night |
Mostly clear, with a low around 82. |
| Tuesday |
Sunny, with a high near 104. |
| Tuesday Night |
Mostly clear, with a low around 81. |
| Wednesday |
Sunny, with a high near 102. |
| Wednesday Night |
Mostly clear, with a low around 80. |
Forecast from NOAA-NWS for Plano, TX.