San Ygnacio, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Ygnacio, a community in Zapata County, Texas.
This Afternoon
100°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny, with a high near 100. Heat index values as high as 109. East wind 5 to 8 mph. Chance of precipitation is 30%.
7-day forecast for San Ygnacio
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 100°F | Chance Showers And Thunderstorms | 5 to 8 mph E | 29% |
| Tonight | 79°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 9 mph ESE | 18% |
| Saturday | 103°F | Sunny | 6 mph ESE | 1% |
| Saturday Night | 79°F | Mostly Clear | 5 to 10 mph ESE | 0% |
| Sunday | 103°F | Sunny | 5 mph SE | 0% |
| Sunday Night | 79°F | Partly Cloudy | 5 to 10 mph SE | 1% |
| Monday | 104°F | Sunny | 3 to 7 mph ESE | 2% |
| Monday Night | 79°F | Mostly Clear | 5 to 12 mph ESE | 7% |
| Tuesday | 102°F | Sunny | 3 to 9 mph ESE | 9% |
| Tuesday Night | 78°F | Mostly Clear | 1 to 12 mph ESE | 10% |
| Wednesday | 101°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 9 mph ESE | 24% |
| Wednesday Night | 78°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 10 mph ESE | 24% |
| Thursday | 100°F | Chance Showers And Thunderstorms | 0 to 9 mph ENE | 33% |
| Thursday Night | 77°F | Chance Showers And Thunderstorms | 0 to 9 mph ENE | 33% |
Forecast source: National Weather Service (api.weather.gov) for San Ygnacio (27.053, -99.424). Updated through the day.
Growing snapshot for San Ygnacio
Last spring frost
Jan 19
First fall frost
Dec 22
Growing season
341 days
Hardiness zone
9b
More local growing data for San Ygnacio: nearby ZIP 78067 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Falcon Lake Estates
Falcon Mesa
Las Palmas
Lopeño
Medina
Morales-Sanchez
New Falcon
Ramireno
Siesta Shores
Zapata
Climate data from the nearest NOAA station, Zapata 1 S, Tx (17.5 mi from San Ygnacio). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.