| National Weather Service Forecast for:
Plano, TX Issued by: National Weather Service Fort Worth/Dallas, TX |
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| Updated: 08/21/2026 4:03pm | ||||||||||||||||||||||||||||||||||||||||
| Plano, Collin County, Texas | ||||||||||||||||||||||||||||||||||||||||
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Extreme Heat Warning issued August 21 at 12:51PM CDT until August 22 at 8:00PM CDT
Extreme Heat Warning issued August 21 at 12:23PM CDT until August 21 at 8:00PM CDT
Air Quality Alert issued August 20 at 3:36PM CDT
| This Afternoon |
Mostly sunny, with a high near 103. Heat index values as high as 105. South wind around 5 mph. |
| Tonight |
Partly cloudy. Low around 82, with temperatures rising to around 84 overnight. Heat index values as high as 104. South southeast wind 5 to 10 mph. |
| Saturday |
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 106. Heat index values as high as 107. South wind around 5 mph. |
| Saturday Night |
A slight chance of showers and thunderstorms before 10pm. Mostly clear. Low around 82, with temperatures rising to around 84 overnight. Heat index values as high as 107. South southeast wind 5 to 10 mph. Chance of precipitation is 20%. |
| Sunday |
Sunny, with a high near 105. South wind 5 to 10 mph. |
| Sunday Night |
Mostly clear. Low around 84, with temperatures rising to around 86 overnight. South southeast wind around 10 mph, with gusts as high as 20 mph. |
| Monday |
Sunny, with a high near 106. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. |
| Monday Night |
A slight chance of rain showers after 1am. Clear, with a low around 84. South wind around 15 mph. Chance of precipitation is 20%. |
| Tuesday |
A slight chance of rain showers before 7am. Sunny, with a high near 106. Southwest wind 10 to 15 mph. Chance of precipitation is 20%. |
| Tuesday Night |
Mostly clear, with a low around 83. |
| Wednesday |
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Sunny, with a high near 104. Chance of precipitation is 20%. |
| Wednesday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 80. Chance of precipitation is 20%. |
| Thursday |
Sunny, with a high near 102. |
| Thursday Night |
Mostly clear, with a low around 80. |
Forecast from NOAA-NWS for Plano, TX.