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5-day forecast / Denison, TX

TuesdaySunny103° / 79° 1%
WednesdaySunny100° / 76°
ThursdaySunny96° / 77°
FridaySunny99° / 81° 2%
SaturdayMostly Sunny99° / 81° 7%

Heat Advisory in Effect for Denison as Temperatures Climb to 103F - Jul 20, 4 PM

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

A Heat Advisory is active for Denison, TX, with heat index values reaching 109F tomorrow. Current conditions show dangerous heat with a feels-like temperature of 104F.

Briar Iverson

July 20, 20262 min read

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

*As of Jul 20, 4 PM local time.*

Dangerous Heat Conditions Underway

A Heat Advisory is currently in effect for Denison, Texas, signaling dangerous heat conditions for the region. The National Weather Service has issued this moderate-severity alert, which remains in place until the evening of July 21. Residents are advised to take precautions as temperatures soar and humidity levels rise.

Current conditions in Denison reflect the intensity of the heat. The air temperature stands at 97F, but the combination of heat and moisture makes it feel like 104F. The relative humidity is at 42%, with a dew point of 70F, indicating significant moisture in the air. Winds are light, blowing at 7 mph with gusts up to 7 mph, under a mostly clear sky.

Forecast for Today and Tomorrow

Today, the sun will remain out with a high near 100F. The National Weather Service notes that heat index values could reach as high as 107F. Winds will be from the southwest around 5 mph. The chance of precipitation is 10%.

Tonight, skies will clear with a low around 79F. Temperatures may rise to around 81F overnight. Heat index values will remain high, reaching up to 107F. South southwest winds will persist around 5 mph.

Tomorrow, conditions will stay sunny with a high near 103F. The heat index is expected to climb to 109F. Winds will shift to the west northwest around 5 mph. The chance of precipitation drops to 1%.

Safety Reminders

With heat index values approaching 109F, it is critical to stay cool and hydrated. Limit outdoor exertion, especially during the hottest parts of the day. Drink plenty of water and check on neighbors who may be vulnerable to extreme heat. Avoid leaving people or pets in parked vehicles. Layering is not necessary, but staying in air-conditioned environments is highly recommended to prevent heat-related illnesses.

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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