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5-day forecast / Denison, TX

FridaySlight Chance Showers And Thunderstorms then Mostly Sunny96° / 77° 19%
SaturdaySunny100° / 78° 3%
SundaySunny99° / 78°
MondaySunny98° / 78° 1%
TuesdaySunny99° / 78° 2%

Denison Heat and Humidity Build Today, Slight Rain Chance Tomorrow - Sep 2, 7 AM

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

Denison faces a humid start with a high near 99F. Expect heat index values up to 102F today. A slight chance of showers is possible tomorrow morning.

Briar Iverson

September 2, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Sep 2, 7 AM local time.*

Humid Start Before Hot Afternoon

Residents in Denison are experiencing a notably humid morning. The air temperature currently sits at 75F, but the high moisture content makes it feel like 76F. Relative humidity stands at 83%, with a dew point of 70F, creating a muggy atmosphere.

Winds are currently calm at 0 mph, with gusts reaching up to 7 mph, while the sky remains clear. This combination of heat and humidity will persist as the day progresses, leading to significant discomfort during peak afternoon hours.

Today’s Forecast and Heat Index

The day will be sunny, with temperatures climbing to a high near 99F. Due to the high humidity, heat index values are expected to reach as high as 102F. Southeast winds will blow at 5 to 10 mph.

The chance of precipitation is low at 6%, meaning dry conditions will dominate the day. As evening approaches, the sky will remain mostly clear. Temperatures will drop to a low around 75F, though they may rise slightly to around 77F overnight.

Heat index values could still reach 100F during the night, keeping the air feeling warm and sticky. Southeast winds will continue at 5 to 10 mph.

Tomorrow’s Outlook and Safety

Tomorrow will bring a slight chance of rain showers between 7am and 10am, followed by a slight chance of showers and thunderstorms. The overall chance of precipitation is 20%. The day will be mostly sunny, with a high near 96F.

Heat index values are expected to peak at 103F, making it even more oppressive than today. Southeast winds will be stronger, ranging from 10 to 15 mph. Given the extreme heat and humidity, it is important to stay hydrated and limit outdoor exertion during the hottest parts of the day.

Check on neighbors who may be vulnerable to the heat, and ensure you have access to cool, shaded areas or air conditioning when possible. No active weather alerts are in effect, but the heat itself poses a significant health risk.

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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