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5-day forecast / Denison, TX

SaturdaySlight Chance Rain Showers then Sunny99° / 80° 10%
SundaySunny100° / 79° 1%
MondaySunny102° / 80°
TuesdaySunny103° / 81° 1%
WednesdayMostly Sunny102° / 81° 1%

Heat Advisory in Effect for Denison as Temperatures Climb Near 100 - Jul 25, 8 AM

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

A Heat Advisory is active for Denison, TX, with heat index values reaching 107 today. Current conditions are humid with overcast skies, but sunshine is expected to return by midday.

Briar Iverson

July 25, 20262 min read

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

*As of Jul 25, 8 AM local time.*

Current Conditions and Alert Status

A Heat Advisory is currently in effect for Denison, Texas, signaling moderate severity and expected urgency. The National Weather Service in Fort Worth issued this advisory to warn residents of dangerously high heat index values. As of this Saturday morning, the air temperature stands at 82F, but the combination of heat and moisture makes it feel like 87F.

Humidity levels are notably high, with a relative humidity of 70% and a dew point of 72F. The sky remains overcast, and winds are blowing from the south-southwest at 10 mph, with gusts reaching up to 27 mph.

Today and Tonight Forecast

Conditions are expected to shift significantly throughout the day. There is a slight chance of rain showers before 10am, but the sky will clear to become sunny for the remainder of the day. The high will reach near 99F. During the afternoon, heat index values are forecast to climb as high as 107. Winds will remain light, from the south-southwest at 5 to 10 mph.

Tonight, the sky will become mostly clear. Temperatures will drop to a low near 80F, though they may rise slightly to around 82F overnight. The heat index will remain elevated, with values as high as 105. Winds will continue from the south-southwest at 5 to 10 mph.

Tomorrow Outlook

Tomorrow will be sunny with a high near 100F. The heat index is expected to reach 106. Winds will be from the south-southwest at 5 to 10 mph. Overnight, skies will clear with a low around 79F. The heat index will stay high at 106, with winds from the south around 5 mph. The chance of precipitation is minimal at 1% for tomorrow.

Safety Reminders

With heat index values approaching 107, it is crucial to stay hydrated and limit midday exertion. Check on neighbors, especially the elderly and those without air conditioning. Avoid prolonged exposure to the sun and seek air-conditioned environments when possible.

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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