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5-day forecast / Richardson, TX

TuesdaySunny101° / 81°
WednesdaySunny102° / 82°
ThursdayMostly Sunny102° / 83°
FridaySunny103° / 83° 4%
SaturdaySunny101° / 78° 9%

Richardson Heat Index Hits 103 Today as Humidity Clings to the Area - Jun 21, 12 PM

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

Oppressive humidity and high heat define the current weather in Richardson, with heat index values reaching 103 today. Temperatures will climb further tomorrow, bringing a slight chance of storms.

Reese Janssen

June 21, 20262 min read

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

As of Jun 21, 12 PM local time.

Oppressive Humidity and High Heat

The air in Richardson feels heavy and thick this afternoon, driven by a dew point of 75F and a relative humidity of 74%. These conditions create an oppressively humid environment that makes the heat feel significantly more intense than the actual air temperature. Right now, the thermometer reads 84F, but the combination of heat and moisture pushes the feels-like temperature up to 92F.

Winds are blowing from the south southwest at 9 mph, with gusts reaching 17 mph, while the sky remains mostly cloudy.

Looking ahead, the heat will not let up. Today is expected to be mostly sunny with a high near 92F. The National Weather Service indicates that heat index values will climb as high as 103 during the day.

Winds will strengthen slightly, coming from the south southwest at 10 to 15 mph, with gusts as high as 25 mph. The chance of precipitation is minimal at just 5%. As tonight approaches, skies will clear to partly cloudy, allowing temperatures to drop to a low near 79F.

However, the muggy conditions will persist, with heat index values remaining as high as 103. Winds will continue from the south at 10 to 15 mph, with gusts potentially hitting 30 mph.

Tomorrow’s Forecast and Safety Tips

Temperatures will rise significantly tomorrow, with a high near 96F. The heat index is projected to reach 107, making it dangerously hot. A slight chance of showers and thunderstorms is expected between 7am and 4pm, with a 22% chance of precipitation overall.

Winds will remain from the south at 10 to 15 mph, with gusts up to 25 mph. Tonight will bring a slight chance of storms between 7pm and 1am, with a low around 78F and heat index values up to 106.

There are no active National Weather Service or NOAA weather alerts in effect for Richardson at this time. Despite the lack of severe warnings, the extreme heat index values pose a serious health risk. Residents should stay hydrated and limit outdoor exertion during the hottest parts of the day.

Check on elderly neighbors and ensure pets have access to cool, shaded areas. The humidity will make the air feel stifling, so keeping indoor spaces cool is essential for comfort and safety.

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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Reese Janssen

Reese Janssen covers weather, storms, and seasonal life around Richardson.

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