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5-day forecast / Denison, TX

TuesdaySunny103° / 81° 1%
WednesdaySunny100° / 78° 1%
ThursdaySunny97° / 78° 1%
FridaySunny99° / 81°
SaturdayMostly Sunny99° / 80° 9%

Heat Advisory in Effect for Denison as Temperatures Climb to 102F - Jul 20, 4 AM

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

A Heat Advisory is active for Denison, TX, with highs near 99F today and 102F tomorrow. Humidity remains high, making heat index values reach 107F. Stay cool and hydrated.

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 AM local time.*

Active Alert and Current Conditions

A Heat Advisory is currently in effect for Denison, Texas, signaling moderate severity and expected urgency. The National Weather Service has issued this advisory to warn residents of dangerously high temperatures and heat index values. As of this Monday overnight, the air temperature stands at 80F, with a feels-like temperature of 83F.

The atmosphere is quite humid, with relative humidity at 78% and a dew point of 72F. Winds are light, blowing at 6 mph with gusts up to 8 mph, under a clear sky.

Forecast for Today and Tomorrow

Today, Denison will experience sunny skies with a high near 99F and a low near 77F. The chance of precipitation is minimal at 2%. According to the National Weather Service, heat index values will reach as high as 105F today. Winds will be from the southwest around 5 mph.

Tonight, conditions will remain mostly clear with a low around 79F. Temperatures are expected to rise to around 81F overnight. The heat index will continue to be elevated, reaching up to 105F. South southwest winds will persist around 5 mph.

Tomorrow, the heat will intensify with sunny skies and a high near 102F. The low will be near 80F, with only a 1% chance of precipitation. Heat index values are forecast to climb as high as 107F.

Winds will shift to the west southwest at around 5 mph. Tomorrow night will be clear with a low around 80F, and temperatures rising to around 82F overnight. South southwest winds will be 0 to 5 mph.

Safety Reminder

With heat index values approaching 107F, it is critical to take precautions against heat-related illnesses. Stay hydrated by drinking plenty of water, even if you do not feel thirsty. Limit outdoor exertion, especially during the midday hours when the sun is strongest.

Check on neighbors and elderly relatives who may be more vulnerable to extreme heat. If you must be outside, seek shade and wear lightweight, light-colored clothing. Be aware of the signs of heat exhaustion and heat stroke, and seek medical attention immediately if symptoms occur.

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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