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5-day forecast / Denison, TX

SundayMostly Sunny107° / 83° 1%
MondayMostly Sunny108° / 83° 4%
TuesdaySlight Chance Showers And Thunderstorms then Sunny107° / 81° 13%
WednesdaySlight Chance Showers And Thunderstorms101° / 78° 17%
ThursdayMostly Sunny101° / 77° 11%

Denison Under Extreme Heat Warning as Temperatures Climb Toward 107 - Aug 23, 2 PM

Denison weather, updated every four hours — local forecasts you can trust.

An active Extreme Heat Warning is in effect for Denison. Current conditions show 100F air temperature with a heat index of 105F. Expect highs near 105F today and 107F tomorrow with low humidity and clear skies.

Briar Iverson

August 23, 20262 min read

National Weather Service radar for North Texas (KFWS)
National Weather Service radar for North Texas (KFWS)

*As of Aug 23, 2 PM local time.*

Severe Heat Alert in Effect

An active Extreme Heat Warning from the National Weather Service is currently in effect for the Denison area. This severe alert underscores the dangerous conditions residents are facing right now. The air temperature is currently 100F, but the heat index makes it feel like 105F.

Relative humidity stands at 33%, and the dew point is 66F. Winds are blowing from the south at 8 mph, with gusts reaching 11 mph. The sky remains clear, allowing direct sunlight to intensify the thermal load on the region.

Today’s and Tonight’s Outlook

Today will remain sunny with a high near 105F. Temperatures are expected to fall to around 103F in the afternoon, though heat index values will reach as high as 105F. The chance of precipitation is minimal at 2%.

South winds will range from 5 to 10 mph. Tonight, the sky will be mostly clear with a low around 82F. Interestingly, temperatures are forecast to rise to around 84F overnight, keeping heat index values near 105F.

South southeast winds will continue at 5 to 10 mph.

Tomorrow’s Forecast and Safety

Tomorrow will be mostly sunny with a high near 107F. Heat index values could reach 108F, making the perceived temperature even more intense. The chance of rain is only 3%.

South southwest winds will pick up to around 10 mph, with gusts as high as 20 mph. Tonight, after tomorrow’s high, temperatures will drop to a low of 83F before rising again to 85F overnight. Given the sustained extreme heat, it is crucial to stay hydrated and limit outdoor exertion during the hottest parts of the day.

Check on elderly neighbors and ensure pets have access to shade and water. Avoid leaving anyone in parked vehicles, as temperatures can rise rapidly in enclosed spaces.

National Weather Service radar for North Texas (KFWS)

Sources

https://radar.weather.gov

https://api.weather.gov

https://open-meteo.com

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Briar Iverson

Briar Iverson covers weather, storms, and seasonal life around Denison.

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