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.
This Afternoon
101°F
Sunny
Sunny, with a high near 101. Heat index values as high as 105. East southeast wind 5 to 8 mph.
7-day forecast for San Carlos I
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 101°F | Sunny | 5 to 8 mph ESE | 0% |
| Tonight | 76°F | Partly Cloudy | 8 to 15 mph SE | 0% |
| Sunday | 101°F | Mostly Sunny | 3 to 7 mph SE | 0% |
| Sunday Night | 76°F | Partly Cloudy | 7 to 13 mph ESE | 2% |
| Monday | 101°F | Sunny | 3 to 9 mph ESE | 4% |
| Monday Night | 76°F | Mostly Clear | 6 to 14 mph ESE | 10% |
| Tuesday | 99°F | Sunny | 5 to 12 mph ESE | 9% |
| Tuesday Night | 75°F | Mostly Clear | 3 to 15 mph ESE | 9% |
| Wednesday | 99°F | Sunny then Chance Showers And Thunderstorms | 3 to 14 mph E | 26% |
| Wednesday Night | 75°F | Chance Showers And Thunderstorms | 3 to 15 mph ESE | 26% |
| Thursday | 97°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 13 mph E | 27% |
| Thursday Night | 75°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 13 mph ESE | 27% |
| Friday | 97°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 19% |
| Friday Night | 74°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 12 mph ESE | 19% |
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 Sep 19, 2026.