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5-day forecast / Denison, TX

FridayMostly Sunny90° / 70° 1%
SaturdayMostly Sunny92° / 72° 1%
SundaySlight Chance Showers And Thunderstorms95° / 73° 24%
MondaySlight Chance Showers And Thunderstorms95° / 75° 15%
TuesdayChance Rain Showers92° / 72° 32%

Heat Advisory in Effect for Denison as Temperatures Climb Near 101 - Aug 11, 4 AM

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

A moderate Heat Advisory is active for Denison, TX. Current conditions show high humidity with a dew point of 70F. Sunny skies and rising heat index values are expected through tomorrow.

Briar Iverson

August 11, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Aug 11, 4 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, remains in effect until August 11 at 8:00PM CDT. The advisory highlights the significant heat stress residents will face over the next day.

As of this Tuesday overnight, the air temperature stands at 79F, with a feels-like reading of 80F. Humidity levels are notably high for this time of year, with relative humidity at 75% and a dew point of 70F. Winds are blowing from the south at 10 mph, with gusts reaching up to 20 mph.

The sky remains clear, offering no relief from the daytime heat buildup.

Forecast for Today and Tomorrow

Today will be sunny with a high near 99F. The National Weather Service reports that heat index values could reach as high as 104 due to the combination of temperature and humidity. South southwest winds are expected to range between 5 to 10 mph.

Overnight tonight, skies will stay clear with a low around 79F. Temperatures may rise slightly to around 81F during the night hours, accompanied by south winds near 10 mph.

Tomorrow promises even more intense heat. Sunny conditions will drive temperatures to a high near 101F. The heat index is forecast to climb as high as 105, creating dangerous conditions for prolonged outdoor exposure. South winds will continue around 10 mph, with gusts potentially hitting 20 mph. Tomorrow night will also be clear, with a low near 79F and temperatures rising to approximately 81F overnight.

Safety Reminders

Given the active Heat Advisory and heat index values exceeding 100 degrees, it is crucial to stay hydrated and limit midday exertion. Check on elderly neighbors or those without air conditioning, as high humidity can make the heat feel more oppressive than the actual temperature suggests. Avoid direct sun exposure during peak hours and seek air-conditioned environments whenever possible.

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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