Port Mansfield, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Mansfield, a community in Willacy County, Texas.
Today
92°F
Sunny
Sunny, with a high near 92. Heat index values as high as 107. East wind 2 to 13 mph.
7-day forecast for Port Mansfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Sunny | 2 to 13 mph E | 4% |
| Tonight | 77°F | Mostly Clear | 2 to 12 mph SE | 2% |
| Sunday | 93°F | Sunny | 1 to 13 mph NNE | 7% |
| Sunday Night | 77°F | Partly Cloudy | 2 to 12 mph ESE | 3% |
| Monday | 93°F | Slight Chance Showers And Thunderstorms | 1 to 12 mph SE | 22% |
| Monday Night | 78°F | Slight Chance Rain Showers then Clear | 1 to 12 mph ESE | 17% |
| Tuesday | 92°F | Chance Showers And Thunderstorms | 1 to 14 mph E | 31% |
| Tuesday Night | 78°F | Chance Showers And Thunderstorms | 2 to 13 mph E | 31% |
| Wednesday | 92°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 to 15 mph ENE | 36% |
| Wednesday Night | 78°F | Chance Showers And Thunderstorms | 5 to 14 mph E | 30% |
| Thursday | 92°F | Chance Showers And Thunderstorms | 5 to 15 mph ENE | 46% |
| Thursday Night | 78°F | Chance Showers And Thunderstorms | 6 to 15 mph E | 34% |
| Friday | 91°F | Chance Showers And Thunderstorms | 6 to 15 mph ENE | 38% |
| Friday Night | 77°F | Chance Showers And Thunderstorms | 6 to 14 mph ENE | 26% |
Forecast source: National Weather Service (api.weather.gov) for Port Mansfield (26.569, -97.442). Updated through the day.
Growing snapshot for Port Mansfield
Last spring frost
Jan 12
First fall frost
Jan 1
Growing season
362 days
Hardiness zone
10a
More local growing data for Port Mansfield: nearby ZIP 78598 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Port Mansfield, Tx (1.2 mi from Port Mansfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.