San Juan, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Juan, a city in Hidalgo County, Texas.
Overnight
78°F
Partly Cloudy
Partly cloudy, with a low around 78. East southeast wind around 1 mph.
7-day forecast for San Juan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 78°F | Partly Cloudy | 1 mph ESE | 2% |
| Saturday | 98°F | Mostly Sunny | 1 to 9 mph ENE | 9% |
| Saturday Night | 77°F | Mostly Clear | 2 to 12 mph ESE | 4% |
| Sunday | 98°F | Mostly Sunny | 1 to 8 mph ESE | 5% |
| Sunday Night | 78°F | Partly Cloudy | 2 to 12 mph ESE | 2% |
| Monday | 98°F | Sunny then Chance Showers And Thunderstorms | 1 to 10 mph ESE | 27% |
| Monday Night | 78°F | Chance Showers And Thunderstorms then Clear | 1 to 12 mph ESE | 27% |
| Tuesday | 96°F | Sunny then Chance Showers And Thunderstorms | 2 to 12 mph ENE | 40% |
| Tuesday Night | 78°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 12 mph NE | 40% |
| Wednesday | 96°F | Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 12 mph ENE | 45% |
| Wednesday Night | 78°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 12 mph ENE | 45% |
| Thursday | 95°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 | 95°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 12 mph NE | 36% |
Forecast source: National Weather Service (api.weather.gov) for San Juan (26.190, -98.152). Updated through the day.
Growing snapshot for San Juan
Last spring frost
Jan 9
First fall frost
Jan 3
Growing season
365 days
Hardiness zone
10a
More local growing data for San Juan: nearby ZIP 78589 weather · frost dates · planting calendar · Texas frost dates
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Hidalgo
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Climate data from the nearest NOAA station, Mcallen Miller Intl Ap, Tx (6.3 mi from San Juan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.