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5-day forecast / Van Alstyne, TX

TodayMostly Sunny91° / 76° 2%
SundayShowers And Thunderstorms Likely84° / 66° 66%
MondayShowers And Thunderstorms78° / 63° 77%
TuesdayMostly Sunny85° / 71° 2%
WednesdaySunny92° / 77° 1%

Van Alstyne Heat Index Hits 99F; Storms Possible Tonight

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

Van Alstyne residents face oppressive heat with a feels-like temperature of 99F. Scattered showers and thunderstorms are expected tonight and tomorrow with a 40-43% chance of precipitation.

Marlene Ortiz

June 12, 20262 min read

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

Sweltering Conditions and Humidity

Van Alstyne is currently experiencing very hot and oppressively humid conditions. The air temperature stands at 89F, but the heat index makes it feel like 99F. The dew point is sitting at 75F with a relative humidity of 63%, creating a muggy atmosphere that intensifies the perceived heat. Winds are blowing from the south at 11 mph, with gusts reaching up to 23 mph, while the sky remains mostly clear.

Forecast for Today and Tonight

Today, temperatures will peak near 92F before dropping to a low near 77F. The sky will transition from mostly cloudy to a chance of showers and thunderstorms later in the day, with a 41% chance of precipitation.

Tonight, the chance of showers and thunderstorms continues after 1am. Conditions will remain mostly cloudy with a low around 77F. The heat index will stay high, reaching values as high as 98F. South winds will decrease to 5 to 10 mph. Residents should anticipate a 40% chance of precipitation, with new rainfall amounts between a tenth and a quarter of an inch possible.

Tomorrow’s Outlook

Tomorrow, the heat will persist with a high near 89F and a low near 77F. The sky will be partly sunny, and the heat index will reach as high as 97F. Southeast winds will be light, ranging from 5 to 10 mph. There is a 43% chance of showers and thunderstorms throughout the day. Similar to tonight, new rainfall amounts between a tenth and a quarter of an inch are possible.

Safety and Awareness

With heat index values consistently in the upper 90s, it is crucial to stay hydrated and limit midday exertion. The combination of high temperatures and humidity can lead to heat-related illnesses quickly. While there are no active National Weather Service or NOAA weather alerts in effect, the potential for thunderstorms means residents should be prepared for sudden changes in weather. Keep an eye on local updates as conditions evolve through the evening and into tomorrow.

National Weather Service radar for North Texas (KFWS)
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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High Humidity and Heat Index Near 99 in Van Alstyne

Van Alstyne faces a humid start with a dew point of 73F. Today brings mostly sunny skies and a high near 91F, with heat index values reaching 99. Showers and thunderstorms are likely tomorrow.

Marlene OrtizJune 13, 20262 min read