Lago Vista, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lago Vista, a community in Starr County, Texas.
Overnight
78°F
Mostly Clear
Mostly clear, with a low around 78. Southeast wind around 7 mph.
7-day forecast for Lago Vista
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 78°F | Mostly Clear | 7 mph SE | 1% |
| Tuesday | 103°F | Sunny | 7 to 13 mph SE | 2% |
| Tuesday Night | 78°F | Partly Cloudy | 9 to 13 mph SE | 5% |
| Wednesday | 103°F | Mostly Sunny | 12 mph SE | 2% |
| Wednesday Night | 78°F | Mostly Clear | 8 to 12 mph SE | 0% |
| Thursday | 103°F | Sunny | 8 to 12 mph SE | 2% |
| Thursday Night | 78°F | Mostly Clear | 8 to 13 mph SE | 2% |
| Friday | 102°F | Sunny | 9 mph SE | 2% |
| Friday Night | 77°F | Mostly Clear | 6 to 12 mph SE | 2% |
| Saturday | 102°F | Sunny | 5 to 8 mph SE | 1% |
| Saturday Night | 77°F | Mostly Clear | 5 to 10 mph SE | 1% |
| Sunday | 102°F | Sunny | 5 to 9 mph SE | 2% |
| Sunday Night | 78°F | Mostly Clear | 12 mph SE | 2% |
| Monday | 103°F | Sunny | 8 to 13 mph SE | 2% |
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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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 Aug 4, 2026.