Alton, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a city in Hidalgo County, Texas.
Overnight
79°F
Mostly Clear
Mostly clear, with a low around 79. Southeast wind around 8 mph.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 79°F | Mostly Clear | 8 mph SE | 1% |
| Tuesday | 99°F | Sunny | 8 to 17 mph SE | 1% |
| Tuesday Night | 80°F | Mostly Clear | 9 to 17 mph SE | 2% |
| Wednesday | 100°F | Mostly Sunny | 9 to 15 mph SE | 2% |
| Wednesday Night | 80°F | Mostly Clear | 7 to 15 mph SE | 0% |
| Thursday | 100°F | Sunny | 7 to 15 mph SE | 8% |
| Thursday Night | 79°F | Mostly Clear | 7 to 15 mph SE | 8% |
| Friday | 99°F | Sunny | 6 to 14 mph SE | 14% |
| Friday Night | 78°F | Mostly Clear | 3 to 14 mph SE | 14% |
| Saturday | 98°F | Sunny | 3 to 12 mph ESE | 6% |
| Saturday Night | 78°F | Mostly Clear | 3 to 14 mph SE | 6% |
| Sunday | 99°F | Sunny | 2 to 12 mph SE | 7% |
| Sunday Night | 79°F | Mostly Clear | 7 to 14 mph SE | 7% |
| Monday | 100°F | Sunny | 7 to 16 mph SE | 2% |
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 Aug 4, 2026.