Heidelberg, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Heidelberg, a community in Hidalgo County, Texas.
Overnight
76°F
Mostly Clear
Mostly clear, with a low around 76. Wind around 0 mph.
7-day forecast for Heidelberg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 76°F | Mostly Clear | 0 mph | 1% |
| Saturday | 98°F | Sunny | 1 to 12 mph ENE | 13% |
| Saturday Night | 76°F | Mostly Clear | 1 to 13 mph SE | 5% |
| Sunday | 99°F | Mostly Sunny | 1 to 12 mph E | 7% |
| Sunday Night | 77°F | Partly Cloudy | 2 to 13 mph ESE | 1% |
| Monday | 98°F | Sunny then Chance Showers And Thunderstorms | 1 to 13 mph ESE | 32% |
| Monday Night | 77°F | Chance Showers And Thunderstorms then Mostly Clear | 1 to 13 mph ESE | 32% |
| Tuesday | 97°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 14 mph ENE | 39% |
| Tuesday Night | 77°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 14 mph NE | 39% |
| Wednesday | 97°F | Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 13 mph NE | 44% |
| Wednesday Night | 77°F | Chance Showers And Thunderstorms then Mostly Clear | 1 to 13 mph ENE | 44% |
| Thursday | 96°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 13 mph NE | 47% |
| Thursday Night | 77°F | Chance Showers And Thunderstorms | 2 to 13 mph ENE | 47% |
| Friday | 96°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 13 mph NE | 33% |
Forecast source: National Weather Service (api.weather.gov) for Heidelberg (26.183, -97.886). Updated through the day.
Growing snapshot for Heidelberg
Last spring frost
Jan 8
First fall frost
Dec 31
Growing season
365 days
Hardiness zone
10a
More local growing data for Heidelberg: 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 Heidelberg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.