Van Alstyne, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Van Alstyne, a city in Grayson County, Texas.
This Afternoon
97°F
Sunny
Sunny, with a high near 97. Heat index values as high as 99. South southeast wind 5 to 10 mph.
7-day forecast for Van Alstyne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 97°F | Sunny | 5 to 10 mph SSE | 0% |
| Tonight | 73°F | Clear | 5 mph S | 0% |
| Saturday | 97°F | Sunny | 5 to 10 mph SSW | 0% |
| Saturday Night | 74°F | Mostly Clear | 10 mph SSE | 0% |
| Sunday | 97°F | Mostly Sunny | 5 to 10 mph S | 12% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 5 mph S | 50% |
| Monday | 93°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph WSW | 50% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NE | 18% |
| Tuesday | 91°F | Mostly Sunny | 10 mph NNE | 12% |
| Tuesday Night | 68°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 90°F | Mostly Sunny | 10 mph ENE | 8% |
| Wednesday Night | 68°F | Partly Cloudy | 5 mph ENE | 2% |
| Thursday | 91°F | Mostly Sunny | 5 mph E | 6% |
| Thursday Night | 69°F | Partly Cloudy | 5 mph ENE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Van Alstyne (33.422, -96.583). Updated through the day.
Growing snapshot for Van Alstyne
Last spring frost
Mar 17
First fall frost
Nov 15
Growing season
241 days
Hardiness zone
8a
More local growing data for Van Alstyne: nearby ZIP 75495 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Mckinney Municipal Airport, Tx (17.4 mi from Van Alstyne). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.