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Lewisville, TX Weather & Growing Conditions

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

This Afternoon
98°F
Mostly Sunny
Mostly sunny. High near 98, with temperatures falling to around 96 in the afternoon. Heat index values as high as 99. South wind around 10 mph.

7-day forecast for Lewisville

WhenTempForecastWindPrecip
This Afternoon 98°F Mostly Sunny 10 mph S 0%
Tonight 79°F Mostly Clear 10 mph SSE 0%
Sunday 99°F Mostly Sunny then Slight Chance Showers And Thunderstorms 5 to 10 mph S 15%
Sunday Night 77°F Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 5 mph NE 40%
Monday 95°F Chance Rain Showers 5 mph NW 40%
Monday Night 74°F Chance Showers And Thunderstorms then Partly Cloudy 5 to 10 mph NE 37%
Tuesday 93°F Mostly Sunny 10 mph NNE 12%
Tuesday Night 72°F Partly Cloudy 5 to 10 mph NE 3%
Wednesday 93°F Mostly Sunny 5 to 10 mph ENE 5%
Wednesday Night 74°F Partly Cloudy 5 to 10 mph ENE 1%
Thursday 94°F Mostly Sunny 5 to 10 mph ESE 3%
Thursday Night 74°F Partly Cloudy 5 to 10 mph E 0%
Friday 95°F Partly Sunny 5 mph ESE 2%
Friday Night 76°F Mostly Cloudy 5 to 10 mph E 1%

Forecast source: National Weather Service (api.weather.gov) for Lewisville (33.051, -96.975). Updated through the day.

Growing snapshot for Lewisville

Last spring frost
Mar 14
First fall frost
Nov 17
Growing season
249 days
Hardiness zone
8b

More local growing data for Lewisville: nearby ZIP 75057 weather · frost dates · planting calendar · Texas frost dates

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Climate data from the nearest NOAA station, Grapevine Dam, Tx (8.4 mi from Lewisville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.