South Alamo, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Alamo, a community in Hidalgo County, Texas.
Today
97°F
Sunny
Sunny, with a high near 97. Heat index values as high as 106. East wind 3 to 10 mph.
7-day forecast for South Alamo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 97°F | Sunny | 3 to 10 mph E | 10% |
| Tonight | 76°F | Mostly Clear | 2 to 12 mph ESE | 5% |
| Sunday | 98°F | Mostly Sunny | 1 to 9 mph E | 5% |
| Sunday Night | 77°F | Partly Cloudy | 2 to 12 mph ESE | 1% |
| Monday | 97°F | Sunny then Chance Showers And Thunderstorms | 1 to 12 mph ESE | 29% |
| Monday Night | 77°F | Chance Showers And Thunderstorms then Clear | 1 to 12 mph ESE | 29% |
| Tuesday | 96°F | Sunny then Chance Showers And Thunderstorms | 2 to 12 mph ENE | 41% |
| Tuesday Night | 77°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 12 mph ENE | 41% |
| Wednesday | 95°F | Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 12 mph ENE | 46% |
| Wednesday Night | 77°F | Chance Showers And Thunderstorms then Mostly Clear | 1 to 12 mph ENE | 46% |
| Thursday | 94°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 10 mph NE | 51% |
| Thursday Night | 77°F | Chance Showers And Thunderstorms | 2 to 10 mph ENE | 51% |
| Friday | 94°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 10 mph NE | 36% |
| Friday Night | 76°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 10 mph ENE | 36% |
Forecast source: National Weather Service (api.weather.gov) for South Alamo (26.152, -98.108). Updated through the day.
Growing snapshot for South Alamo
Last spring frost
Jan 9
First fall frost
Jan 3
Growing season
365 days
Hardiness zone
10a
More local growing data for South Alamo: nearby ZIP 78516 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Mcallen Miller Intl Ap, Tx (8.7 mi from South Alamo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.