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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.