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5-day forecast / Denison, TX

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

Extreme Heat Warning in Effect for Denison as Temperatures Soar Near 103F - Jul 21, 8 AM

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

An Extreme Heat Warning is active for Denison, TX. Current conditions are hot and humid with a high near 103F expected today. Residents should take precautions against severe heat.

Briar Iverson

July 21, 20262 min read

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

*As of Jul 21, 8 AM local time.*

Severe Heat Alert Active

An Extreme Heat Warning is currently in effect for Denison, Texas. This alert, issued by the National Weather Service, indicates severe conditions with expected urgency. The warning remains active until 8:00 PM CDT today. Residents are urged to monitor local conditions closely as temperatures rise significantly above normal levels.

Current Conditions and Today's Forecast

Right now, the air temperature in Denison stands at 79F, with a feels-like temperature of 80F. The relative humidity is at 74%, and the dew point is recorded at 70F, indicating quite humid air. Winds are light at 3 mph, with gusts reaching up to 10 mph, under a clear sky.

Today, the sun will be out with no rain expected, as the chance of precipitation is just 1%. The high will reach near 103F. The National Weather Service notes that heat index values could climb as high as 110.

Winds will be from the west northwest around 5 mph. Temperatures will remain elevated overnight, with a low near 81F and heat index values peaking at 111. Winds will shift to the east at 0 to 5 mph.

Tomorrow's Outlook and Safety

Tomorrow, the sky will remain sunny with a 0% chance of precipitation. The high will be near 100F, with heat index values reaching up to 107. Winds will come from the northeast at 5 to 10 mph.

Overnight, conditions will become mostly clear with a low around 76F. Temperatures may rise slightly to around 78F during the night, with heat index values as high as 106. Winds will be from the east around 5 mph.

Given the Extreme Heat Warning and temperatures nearing 103F, it is critical 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 whenever possible 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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