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5-day forecast / Richardson, TX

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

Heat Advisory in Effect for Richardson as Temperatures Climb Near 100 - Jul 20, 8 AM

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

A Heat Advisory is active for Richardson, TX, with current feels-like temperatures at 91F. Highs near 100F today and 103F tomorrow bring oppressive humidity and heat index values up to 107.

Reese Janssen

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, 8 AM local time.*

Current Conditions and Alert Status

A Heat Advisory is currently in effect for Richardson, Texas, signaling dangerous heat levels for the region. The National Weather Service has issued this moderate-severity alert, which remains active until the evening of July 20. Residents are urged to take this warning seriously as conditions intensify.

Right now, the air temperature stands at 82F, but the oppressive humidity makes it feel significantly hotter. The relative humidity is at 84%, with a dew point of 77F, creating a muggy atmosphere. The current feels-like temperature is 91F. Winds are light, blowing at 3 mph with gusts reaching 11 mph, while the sky remains clear.

Forecast for Today and Tomorrow

Today, Richardson will experience sunny skies with a high near 100F. The National Weather Service notes that heat index values could reach as high as 106. Southwest winds will hover around 5 mph.

Overnight, conditions will become mostly clear, with a low around 81F. Temperatures may rise slightly to around 83F during the night hours. Heat index values will remain elevated, peaking near 104, with south southwest winds around 5 mph.

Tomorrow, the heat will persist and intensify. Sunny skies will continue, pushing the high near 103F. The heat index is expected to climb to 107, making it feel even more oppressive.

West southwest winds will remain light at around 5 mph. As tomorrow night approaches, skies will clear, leading to a low around 83F. Temperatures may rise to around 85F overnight, with heat index values reaching 105.

South southwest winds will be calm, ranging from 0 to 5 mph.

Safety Reminders

Given the active Heat Advisory and the forecasted heat index values exceeding 100F, extreme caution is necessary. High humidity levels combined with intense heat can lead to heat-related illnesses quickly. Residents should stay hydrated by drinking water frequently, even if not thirsty.

Limit outdoor exertion, especially during the midday hours when the sun is strongest. Check on elderly neighbors and those without air conditioning to ensure their safety. Wear lightweight, light-colored clothing and seek air-conditioned environments whenever possible to avoid overheating.

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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