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5-day forecast / Denison, TX

FridaySlight Chance Showers And Thunderstorms then Mostly Sunny96° / 72° 19%
SaturdaySunny100° / 78° 3%
SundaySunny99° / 78°
MondaySunny98° / 78° 1%
TuesdaySunny99° / 78° 2%

Denison Heat Advisory: Dangerous Heat Index Values Expected - Sep 9, 2 PM

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

A Heat Advisory is active for Denison as air temperatures reach 95F and heat index values climb to 104F. Residents should stay hydrated and limit midday exertion.

Briar Iverson

September 9, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Sep 9, 2 PM local time.*

Dangerous Heat Conditions

A Heat Advisory is currently in effect for the Denison area, signaling dangerous heat conditions. As of this afternoon, the air temperature stands at 95F, but the combination of heat and humidity means it feels like 100F. The relative humidity is 42%, with a dew point of 68F.

Winds are light, blowing from the south at 7 mph with gusts reaching 8 mph. The sky remains clear, allowing direct sunlight to intensify the thermal load on the body.

Today and Tonight Outlook

The forecast indicates that sunny conditions will persist, with the high temperature near 100F. The heat index values are expected to reach as high as 104F, creating hazardous conditions for outdoor activity. The low temperature will be near 79F, though temperatures may rise to around 81F overnight.

Winds will shift to a south direction, ranging from 5 to 10 mph. The chance of precipitation is minimal at 1%, meaning dry heat will dominate the evening hours.

Tomorrow's Forecast

Tomorrow will bring a high near 99F, with temperatures falling to around 95F in the afternoon. The heat index values will still reach 102F. While the morning starts sunny, a chance of showers and thunderstorms is expected after 1 pm.

The overall chance of precipitation is 51%, with new rainfall amounts between a tenth and a quarter of an inch possible. Winds will be lighter, around 5 mph from the south. Tonight, the low will be near 77F, with temperatures rising to around 79F overnight.

The chance of precipitation remains at 50%, and winds will shift to the east-northeast at around 5 mph.

Safety Reminders

Given the active Heat Advisory, it is crucial to take precautions. Stay hydrated by drinking water regularly, even if you do not feel thirsty. Limit outdoor exertion during the hottest parts of the day.

Check on elderly neighbors and those without access to air conditioning. If you must be outside, wear light-colored, loose-fitting clothing and use sunscreen. Be aware that heat-related illnesses can develop quickly in these conditions.

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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