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5-day forecast / Van Alstyne, TX

TuesdaySunny102° / 81° 1%
WednesdaySunny100° / 79° 1%
ThursdaySunny98° / 78° 1%
FridaySunny99° / 81°
SaturdayMostly Sunny99° / 80° 6%

Heat Advisory in Effect for Van Alstyne as Temperatures Climb - Jul 20, 8 AM

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

A Heat Advisory is active for Van Alstyne, TX, with highs near 98F and heat index values reaching 104F today. Humidity remains high with a dew point of 73F.

Marlene Ortiz

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 Van Alstyne, Texas, signaling moderate severity and expected urgency. The National Weather Service has issued this alert to warn residents of dangerously high heat index values. As of this morning, the air temperature stands at 82F, but the combination of heat and moisture makes it feel like 88F.

The relative humidity is at 74%, with a dew point of 73F, indicating quite humid conditions. Skies are currently clear, and winds are blowing at 6 mph with gusts reaching 19 mph.

Today and Tonight Forecast

Today will be sunny with a high near 98F. The National Weather Service forecasts heat index values as high as 104F. Southwest winds will be around 5 mph.

The chance of precipitation is just 2%. As tonight approaches, skies will remain clear. Temperatures will drop to a low near 78F, but will rise to around 80F overnight.

Heat index values will remain elevated, reaching up to 104F. South southwest winds will persist at around 5 mph.

Tomorrow Outlook

Tomorrow will also be sunny, with a high near 101F. This marks a significant increase in heat, with heat index values expected to climb as high as 106F. West southwest winds will be around 5 mph.

There is no chance of precipitation, at 0%. Following tomorrow, skies will clear again with a low around 80F. Temperatures may rise to around 82F overnight, with heat index values near 104F.

Winds will be light, around 0 mph from the south.

Safety Reminder

With heat index values exceeding 100F, it is critical to stay hydrated and limit midday exertion. Check on neighbors, especially the elderly and those without air conditioning. Avoid prolonged exposure to the sun and seek air-conditioned environments when possible. The combination of high temperatures and humidity poses a serious risk to health, so please take necessary precautions to stay cool and safe.

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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Marlene Ortiz

Marlene Ortiz covers weather, storms, and seasonal life across Van Alstyne and Grayson County.

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