Lago Vista, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lago Vista, a community in Starr County, Texas.
Tonight
78°F
Mostly Clear
Mostly clear, with a low around 78. East southeast wind 2 to 7 mph.
7-day forecast for Lago Vista
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 78°F | Mostly Clear | 2 to 7 mph ESE | 5% |
| Saturday | 101°F | Sunny | 5 mph ESE | 1% |
| Saturday Night | 77°F | Mostly Clear | 3 to 8 mph ESE | 0% |
| Sunday | 102°F | Sunny | 5 mph SE | 0% |
| Sunday Night | 78°F | Partly Cloudy | 5 to 9 mph SE | 0% |
| Monday | 102°F | Sunny | 6 mph ESE | 2% |
| Monday Night | 78°F | Mostly Clear | 3 to 9 mph SE | 6% |
| Tuesday | 101°F | Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph ESE | 18% |
| Tuesday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 to 10 mph ESE | 18% |
| Wednesday | 100°F | Sunny then Chance Showers And Thunderstorms | 1 to 8 mph E | 34% |
| Wednesday Night | 77°F | Chance Showers And Thunderstorms | 1 to 8 mph ESE | 34% |
| Thursday | 99°F | Chance Showers And Thunderstorms | 1 to 6 mph E | 40% |
| Thursday Night | 76°F | Chance Showers And Thunderstorms | 0 to 7 mph E | 40% |
| Friday | 98°F | Chance Rain Showers | 2 to 6 mph ENE | 32% |
Forecast source: National Weather Service (api.weather.gov) for Lago Vista (26.564, -99.108). Updated through the day.
Growing snapshot for Lago Vista
Last spring frost
Jan 9
First fall frost
Jan 1
Growing season
363 days
Hardiness zone
9b
More local growing data for Lago Vista: nearby ZIP 78545 weather · frost dates · planting calendar · Texas frost dates
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Falcon Heights
Climate data from the nearest NOAA station, Falcon Dam, Tx (1.9 mi from Lago Vista). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.