Back to Weather

5-day forecast / Denison, TX

SaturdayMostly Sunny95° / 77° 4%
SundaySunny97° / 78° 4%
MondaySunny100° / 79°
TuesdaySunny101° / 80° 1%
WednesdaySunny101° / 79°

Denison Heat Index Hits 99 Today as Humidity Lingers - Jul 18, 12 PM

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

Temperatures in Denison are soaring this Saturday afternoon with a heat index near 99. Humidity remains high, making conditions feel oppressive. No severe weather alerts are active.

Briar Iverson

July 18, 20262 min read

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

*As of Jul 18, 12 PM local time.*

Current Conditions and Heat Index

It is currently Saturday afternoon in Denison, and the heat is already intense. The air temperature stands at 88F, but the combination of heat and moisture pushes the feels-like temperature to 98F. Relative humidity is at 66%, with a dew point of 75F, creating an oppressively humid environment that makes the air feel heavy and stifling.

Winds are blowing from the south southwest at 12 mph, with gusts reaching 16 mph, providing minimal relief from the warmth. The sky remains clear overhead, offering no shade from the sun.

Forecast for Today and Tomorrow

The National Weather Service indicates that today will remain mostly sunny with a high near 94F. The heat index is expected to climb as high as 99F during the day. Winds will shift slightly to the south southwest at 5 to 10 mph. There is only a 4% chance of precipitation, so residents should expect dry conditions.

Tonight, skies will transition to partly cloudy with a low around 77F. The heat index will remain elevated, reaching up to 99F. Winds will continue from the south southwest at 5 to 10 mph.

Tomorrow, the heat will intensify further. Expect sunny skies with a high near 96F. The heat index is forecast to reach 102F, marking a significant increase in perceived temperature.

Winds will remain light from the south southwest at 5 to 10 mph. There is also a 4% chance of rain tomorrow, keeping the day dry. Tomorrow night, conditions will clear with a low around 78F and a heat index up to 101F.

Safety and Alerts

There are no active National Weather Service or NOAA weather alerts in effect for Denison at this time. However, the extreme heat and high humidity pose serious health risks. It is crucial to stay hydrated by drinking plenty of water throughout the day.

Limit outdoor exertion, especially during the midday hours when the sun is strongest. Check on elderly neighbors and those who may be vulnerable to heat-related illnesses. If you must be outside, seek air-conditioned spaces whenever possible and wear lightweight, light-colored clothing to help manage the oppressive heat.

National Weather Service radar for North Texas (KFWS)

Sources

https://radar.weather.gov

https://api.weather.gov

https://open-meteo.com

Share

Briar Iverson

Briar Iverson covers weather, storms, and seasonal life around Denison.

Related Stories

More in Sport