Weslaco, TX Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Weslaco, a city in Hidalgo County, Texas.

Today

99°F

Sunny

Sunny, with a high near 99. Heat index values as high as 106. South southeast wind 13 to 16 mph, with gusts as high as 28 mph.

7-day forecast for Weslaco

When	Temp	Forecast	Wind	Precip
Today	99°F	Sunny	13 to 16 mph SSE	1%
Tonight	80°F	Mostly Clear	9 to 16 mph SE	2%
Wednesday	99°F	Mostly Sunny	9 to 15 mph SE	2%
Wednesday Night	80°F	Mostly Clear	7 to 15 mph SE	0%
Thursday	100°F	Sunny	7 to 15 mph SE	8%
Thursday Night	79°F	Clear	5 to 15 mph SE	8%
Friday	99°F	Sunny then Slight Chance Showers And Thunderstorms	5 to 14 mph SE	19%
Friday Night	78°F	Slight Chance Showers And Thunderstorms then Mostly Clear	3 to 14 mph SE	19%
Saturday	98°F	Sunny	2 to 13 mph ESE	10%
Saturday Night	78°F	Mostly Clear	3 to 13 mph SE	10%
Sunday	98°F	Sunny	2 to 13 mph SE	9%
Sunday Night	79°F	Mostly Clear	7 to 14 mph SE	9%
Monday	99°F	Sunny	7 to 15 mph SE	3%
Monday Night	80°F	Mostly Clear	10 to 16 mph SE	3%

Forecast source: National Weather Service (api.weather.gov) for Weslaco (26.161, -97.988). Updated through the day.

Growing snapshot for Weslaco

Last spring frost

Jan 8

First fall frost

Dec 31

Growing season

365 days

Hardiness zone

10a

More local growing data for Weslaco: nearby ZIP 78599 weather · frost dates · planting calendar · Texas frost dates

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Climate data from the nearest NOAA station, Weslaco, Tx (2.9 mi from Weslaco). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.