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5-day forecast / Van Alstyne, TX

TodaySlight Chance Showers And Thunderstorms87° / 71° 18%
SundayMostly Sunny92° / 77° 4%
MondayChance Showers And Thunderstorms91° / 75° 34%
TuesdayShowers And Thunderstorms Likely then Chance Showers And Thunderstorms90° / 74° 58%
WednesdayChance Showers And Thunderstorms then Showers And Thunderstorms Likely87° / 72° 55%

Humidity Peaks in Van Alstyne as Heat Builds Toward Tomorrow

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

Van Alstyne residents face high humidity and rising temperatures today, with a slight chance of showers. Conditions will warm significantly tomorrow with heat index values reaching 106.

Marlene Ortiz

June 20, 20262 min read

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

Current Conditions and Humidity

It is currently Saturday overnight in Van Alstyne, and the air remains thick with moisture. The current air temperature sits at 73F, but the high relative humidity of 94% makes it feel like 75F. The dew point is recorded at 72F, indicating a very muggy atmosphere. Winds are currently calm at 0 mph, though gusts have reached up to 10 mph. The sky is clear at this hour.

Today and Tonight Forecast

Today, the sun will break through the clouds, resulting in partly sunny skies. Highs will reach near 88F, but the heat index will climb to as high as 98F due to the humidity. There is a slight chance of showers and thunderstorms after 7am, with a 20% chance of precipitation. Any rainfall is expected to be minimal, with new amounts less than a tenth of an inch possible. Winds will shift to the southeast around 5 mph.

As evening approaches, the chance for storms continues before 7pm, also at 20%. Skies will become partly cloudy overnight. Temperatures will drop to a low around 74F initially, but will rise to around 76F later in the night. Winds will pick up from the south southeast, blowing at 10 to 15 mph with gusts as high as 25 mph.

Tomorrow Outlook

Tomorrow brings significantly warmer and windier conditions. Skies will be mostly sunny with highs near 92F. The heat index is expected to soar to as high as 106F, creating dangerous heat stress levels. South winds will increase to 15 to 20 mph, with gusts reaching 30 mph. There is a 4% chance of precipitation, making rain unlikely during the day.

Safety Reminder

With heat index values approaching 106F tomorrow, it is critical to stay hydrated and limit midday exertion. Wear lightweight, light-colored clothing and seek air-conditioned environments when possible. Check on elderly neighbors and those without reliable cooling to ensure their safety during this period of intense heat.

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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