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Port Mansfield, TX Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Port Mansfield, a community in Willacy County, Texas.

Tonight
76°F
Mostly Clear
Mostly clear, with a low around 76. Southeast wind 2 to 12 mph.

7-day forecast for Port Mansfield

WhenTempForecastWindPrecip
Tonight 76°F Mostly Clear 2 to 12 mph SE 1%
Sunday 93°F Sunny 0 to 13 mph N 9%
Sunday Night 78°F Partly Cloudy 3 to 12 mph ESE 2%
Monday 93°F Sunny 1 to 12 mph ESE 13%
Monday Night 78°F Mostly Clear 1 to 12 mph ESE 11%
Tuesday 92°F Chance Showers And Thunderstorms 1 to 14 mph ESE 34%
Tuesday Night 78°F Chance Showers And Thunderstorms 2 to 13 mph E 32%
Wednesday 92°F Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 2 to 15 mph ENE 47%
Wednesday Night 78°F Chance Showers And Thunderstorms 5 to 14 mph E 34%
Thursday 91°F Chance Showers And Thunderstorms 5 to 15 mph ENE 50%
Thursday Night 78°F Chance Showers And Thunderstorms 6 to 14 mph E 42%
Friday 91°F Chance Rain Showers 6 to 15 mph ENE 51%
Friday Night 78°F Chance Showers And Thunderstorms 6 to 14 mph E 39%
Saturday 91°F Chance Rain Showers then Slight Chance Showers And Thunderstorms 6 to 13 mph ENE 32%

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

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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 20, 2026.