San Carlos I, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Carlos I, a community in Webb County, Texas.
Today
103°F
Sunny
Sunny, with a high near 103. Heat index values as high as 107. Southeast wind 13 to 17 mph, with gusts as high as 22 mph.
7-day forecast for San Carlos I
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 103°F | Sunny | 13 to 17 mph SE | 3% |
| Tonight | 79°F | Mostly Clear | 17 mph SE | 6% |
| Wednesday | 104°F | Mostly Sunny | 16 mph SE | 2% |
| Wednesday Night | 79°F | Mostly Clear | 14 to 17 mph SE | 1% |
| Thursday | 104°F | Sunny | 15 mph SE | 2% |
| Thursday Night | 78°F | Mostly Clear | 13 to 18 mph SE | 2% |
| Friday | 103°F | Sunny | 10 to 14 mph SE | 3% |
| Friday Night | 77°F | Mostly Clear | 9 to 17 mph SE | 4% |
| Saturday | 102°F | Sunny | 7 to 12 mph SE | 0% |
| Saturday Night | 77°F | Mostly Clear | 9 to 16 mph SE | 5% |
| Sunday | 101°F | Sunny | 8 to 13 mph SE | 2% |
| Sunday Night | 78°F | Mostly Clear | 13 to 16 mph SE | 2% |
| Monday | 103°F | Sunny | 12 to 17 mph SE | 1% |
| Monday Night | 78°F | Mostly Clear | 20 mph SE | 1% |
Forecast source: National Weather Service (api.weather.gov) for San Carlos I (27.490, -99.373). Updated through the day.
Growing snapshot for San Carlos I
Last spring frost
Jan 20
First fall frost
Dec 25
Growing season
344 days
Hardiness zone
9b
More local growing data for San Carlos I: nearby ZIP 78046 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Laredo Afb, Tx (11.3 mi from San Carlos I). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.