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5-day forecast / Denison, TX

MondaySunny100° / 79° 10%
TuesdaySunny103° / 81° 1%
WednesdaySunny102° / 78° 1%
ThursdaySunny97° / 78° 1%
FridaySunny99° / 79° 1%

Dangerous Heat Index Hits 101F in Denison as Humidity Rises - Jul 19, 4 PM

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

Denison residents face dangerous heat with a current feels-like temperature of 101F. Humidity levels are elevated, creating a stifling atmosphere as temperatures climb toward 96F today.

Briar Iverson

July 19, 20262 min read

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

*As of Jul 19, 4 PM local time.*

Current Conditions and Heat Stress

Denison is currently experiencing a significant heat event, with the air temperature at 93F. However, the combination of heat and moisture is making conditions feel much more intense, with a feels-like temperature of 101F. This elevated heat index poses a serious risk to anyone spending time outdoors without proper precautions.

Humidity levels are notably high, with the relative humidity at 50% and a dew point of 72F. This muggy atmosphere traps heat against the skin, reducing the body's ability to cool itself through evaporation. Winds are light, blowing from the south southwest at 6 mph with gusts up to 10 mph, which is insufficient to break the heat.

The sky remains partly cloudy, offering little relief from the sun's intensity.

Forecast Outlook

Today, the heat will persist with a high near 96F. There is a slight chance of showers and thunderstorms, with a 24% probability of precipitation. While rain is possible, it is not expected to significantly lower temperatures. The heat index is forecast to reach as high as 104F during the day.

Tonight, conditions will remain warm and humid. A low near 78F is expected, with a slight chance of showers and thunderstorms before 10pm. The heat index will remain elevated, reaching up to 103F. Winds will shift to the south, increasing slightly to 5 to 10 mph.

Tomorrow, the heat will intensify further. Expect a high near 100F under sunny skies. The heat index could climb to 105F. Winds will be from the southwest at 5 to 10 mph. There is only a 2% chance of precipitation, meaning clear skies will allow for maximum heating.

Safety Reminders

Given the dangerous heat index values, it is critical to stay hydrated and limit midday exertion. Seek air-conditioned environments during the hottest parts of the day. Check on elderly neighbors and those without adequate cooling. Wear lightweight, light-colored clothing and use sunscreen if you must be outside. Remember that heat-related illnesses can develop quickly when humidity is high.

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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