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5-day forecast / Denison, TX

SaturdaySunny94° / 72° 2%
SundaySlight Chance Showers And Thunderstorms93° / 73° 22%
MondayChance Rain Showers94° / 75° 30%
TuesdayPartly Sunny95° / 75° 5%
WednesdayChance Showers And Thunderstorms88° / 72° 57%

Heat Advisory in Effect for Denison as Temperatures Climb Near 100 - Aug 11, 8 AM

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

A Heat Advisory is active for Denison, TX, with highs near 99 today and heat index values reaching 104. Humidity remains high with a dew point of 70F.

Briar Iverson

August 11, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Aug 11, 8 AM local time.*

Current Conditions and Alert Status

Denison, TX, is currently under an active Heat Advisory issued by the National Weather Service in Fort Worth. This moderate-severity alert, which carries an expected urgency level, is in effect from early Tuesday morning until 8:00 PM CDT today. The advisory highlights the dangerous combination of rising temperatures and significant humidity that will make conditions feel much hotter than the actual air temperature.

As of this Tuesday morning, the air temperature stands at 77F, with a feels-like reading of 78F. Relative humidity is holding steady at 78%, supported by a dew point of 70F, indicating quite humid air masses moving through the area. Winds are currently blowing from the south southwest at 10 mph, with gusts reaching up to 22 mph. The sky remains clear overhead.

Forecast for Today and Tomorrow

Today will be sunny with a high near 99F. Despite the clear skies, the heat index values are expected to climb as high as 104 due to the humidity. South southwest winds will persist at 5 to 10 mph. There is no chance of precipitation today.

Tonight, conditions will remain clear with a low around 79F. Temperatures may rise slightly to around 81F overnight. The heat index could reach as high as 101, meaning the night will not offer much relief from the heat. South winds will continue around 10 mph.

Tomorrow, the sun will shine again with a high near 101F. Heat index values are forecast to peak at 105. South winds will remain around 10 mph, with gusts potentially reaching 20 mph. Like today, there is no chance of rain.

Safety Reminder

Given the active Heat Advisory and heat index values exceeding 100 degrees, residents should take precautions to stay safe. Hydrate frequently and limit midday exertion when the sun is at its peak. Check on neighbors, especially those who are elderly or vulnerable, to ensure they remain cool and safe during these extreme conditions.

National Weather Service radar for North Texas (KFWS)

Sources

National Weather Service radar

National Weather Service forecast data

Open-Meteo weather data

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Briar Iverson

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

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