Lago Vista, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lago Vista, a city in Travis County, Texas.
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 101. South wind 5 to 10 mph.
7-day forecast for Lago Vista
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 5 to 10 mph S | 2% |
| Tonight | 76°F | Mostly Clear | 5 mph SSE | 2% |
| Wednesday | 99°F | Sunny | 5 to 10 mph S | 1% |
| Wednesday Night | 76°F | Mostly Clear | 5 to 10 mph S | 1% |
| Thursday | 98°F | Sunny | 5 mph S | 3% |
| Thursday Night | 76°F | Mostly Clear | 5 mph SSE | 3% |
| Friday | 97°F | Sunny | 0 to 5 mph S | 4% |
| Friday Night | 75°F | Mostly Clear | 0 to 5 mph SSE | 4% |
| Saturday | 96°F | Sunny | 0 to 5 mph SSE | 3% |
| Saturday Night | 75°F | Mostly Clear | 5 mph SSE | 3% |
| Sunday | 95°F | Sunny | 0 to 5 mph SSE | 4% |
| Sunday Night | 76°F | Mostly Clear | 5 mph SSE | 4% |
| Monday | 96°F | Mostly Sunny | 5 to 10 mph S | 4% |
| Monday Night | 75°F | Mostly Clear | 5 to 10 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov) for Lago Vista (30.453, -97.991). Updated through the day.
Growing snapshot for Lago Vista
Last spring frost
Mar 11
First fall frost
Nov 20
Growing season
254 days
Hardiness zone
9a
More local growing data for Lago Vista: nearby ZIP 78645 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Austin Great Hills, Tx (12.5 mi from Lago Vista). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.