Mercedes, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mercedes, a city in Hidalgo County, Texas.
This Afternoon
94°F
Mostly Sunny
Mostly sunny. High near 94, with temperatures falling to around 87 in the afternoon. West wind 5 to 9 mph.
7-day forecast for Mercedes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 94°F | Mostly Sunny | 5 to 9 mph W | 12% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 6 to 9 mph N | 40% |
| Wednesday | 84°F | Mostly Sunny | 7 to 12 mph NNE | 5% |
| Wednesday Night | 68°F | Partly Cloudy | 3 to 12 mph E | 2% |
| Thursday | 91°F | Mostly Sunny | 5 to 10 mph SE | 4% |
| Thursday Night | 70°F | Showers And Thunderstorms | 3 to 10 mph SW | 76% |
| Friday | 82°F | Chance Showers And Thunderstorms then Partly Sunny | 6 to 14 mph N | 45% |
| Friday Night | 64°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 9 mph N | 19% |
| Saturday | 79°F | Chance Rain Showers | 9 to 13 mph N | 46% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 8 to 14 mph N | 33% |
| Sunday | 76°F | Chance Rain Showers | 14 mph N | 26% |
| Sunday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 9 mph N | 15% |
| Monday | 78°F | Mostly Sunny | 9 mph NNE | 5% |
| Monday Night | 57°F | Partly Cloudy | 3 to 8 mph ENE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Mercedes (26.154, -97.913). Updated through the day.
Growing snapshot for Mercedes
Last spring frost
Jan 8
First fall frost
Dec 31
Growing season
365 days
Hardiness zone
10a
More local growing data for Mercedes: nearby ZIP 78570 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Weslaco, Tx (3.7 mi from Mercedes). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.