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5-day forecast / Van Alstyne, TX

SaturdayMostly Sunny94° / 76° 2%
SundaySunny95° / 77° 2%
MondaySunny98° / 78°
TuesdaySunny100° / 79°
WednesdaySunny100° / 79° 1%

Humidity Clings to Van Alstyne as Temps Climb Toward 95 - Jul 18, 8 AM

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

Van Alstyne residents face a humid start with a dew point of 73F. Highs near 94 today and 95 tomorrow bring heat index values up to 102.

Marlene Ortiz

July 18, 20262 min read

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

*As of Jul 18, 8 AM local time.*

Current Conditions and Humidity

The morning air in Van Alstyne is heavy with moisture, creating a muggy atmosphere right from the start. Current readings show an air temperature of 79F, but the heat index makes it feel like 82F. The relative humidity is sitting at a sticky 84%, with a dew point of 73F indicating significant moisture in the lower atmosphere.

Despite the dampness, the sky remains clear. Winds are blowing from the south southwest at 9 mph, with gusts reaching up to 24 mph, adding a slight breeze to the humid conditions.

Today and Tonight Forecast

Temperatures will rise significantly throughout the day. The high today is expected to reach near 94F, while the low tonight will settle around 76F. The sky will be mostly sunny during the day, transitioning to partly cloudy skies overnight.

There is a minimal chance of precipitation at just 2% for both periods. As the sun sets, temperatures will actually rise slightly to around 78F during the overnight hours. The heat index will remain elevated, with values as high as 99F.

Winds will ease up to 5 to 10 mph from the south southwest.

Tomorrow Outlook

Conditions will remain hot and humid as the week progresses. Tomorrow will be sunny with a high near 95F and a low around 77F. The heat index is forecast to climb even higher, reaching up to 102F.

Winds will continue from the south southwest at 5 to 10 mph. Overnight, skies will clear, and the heat index will drop slightly to around 99F, with winds shifting to the south at 5 to 10 mph.

Safety Reminder

With heat index values approaching 102F, the risk of heat-related illness increases. It is crucial to stay hydrated by drinking plenty of water, even if you do not feel thirsty. Limit outdoor exertion during the hottest parts of the day, typically between 10 a.m. and 4 p.m.

If you must be outside, seek air-conditioned spaces frequently and wear lightweight, light-colored clothing. Check on elderly neighbors or those with health conditions who may be more vulnerable to the heat.

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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