Alton, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a city in Hidalgo County, Texas.
Tonight
66°F
Slight Chance Rain Showers then Partly Cloudy
A slight chance of rain showers between 10pm and midnight. Partly cloudy, with a low around 66. North northeast wind around 7 mph. Chance of precipitation is 20%.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Slight Chance Rain Showers then Partly Cloudy | 7 mph NNE | 16% |
| Wednesday | 85°F | Mostly Sunny | 7 mph NE | 1% |
| Wednesday Night | 68°F | Partly Cloudy | 3 to 7 mph E | 4% |
| Thursday | 92°F | Mostly Sunny | 3 to 8 mph SE | 7% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 2 to 7 mph NNE | 74% |
| Friday | 82°F | Chance Showers And Thunderstorms then Partly Sunny | 7 to 13 mph N | 34% |
| Friday Night | 64°F | Partly Cloudy | 2 to 7 mph NNE | 14% |
| Saturday | 79°F | Chance Rain Showers | 7 to 10 mph N | 38% |
| Saturday Night | 61°F | Chance Rain Showers | 5 to 13 mph N | 33% |
| Sunday | 76°F | Slight Chance Rain Showers then Mostly Sunny | 7 to 14 mph N | 18% |
| Sunday Night | 57°F | Partly Cloudy | 2 to 6 mph N | 13% |
| Monday | 79°F | Mostly Sunny | 6 mph NE | 5% |
| Monday Night | 58°F | Partly Cloudy | 3 mph E | 1% |
| Tuesday | 82°F | Mostly Sunny | 2 to 6 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov) for Alton (26.288, -98.309). Updated through the day.
Growing snapshot for Alton
Last spring frost
Jan 23
First fall frost
Dec 28
Growing season
340 days
Hardiness zone
10a
More local growing data for Alton: nearby ZIP 78573 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, La Joya, Tx (2.4 mi from Alton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.