Lewisville, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewisville, a city in Denton County, Texas.
Today
99°F
Mostly Sunny
Mostly sunny, with a high near 99. Heat index values as high as 102. South wind 5 to 10 mph.
7-day forecast for Lewisville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Mostly Sunny | 5 to 10 mph S | 0% |
| Tonight | 79°F | Mostly Clear | 10 mph S | 0% |
| Sunday | 99°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 22% |
| Sunday Night | 77°F | Chance Showers And Thunderstorms | 5 mph S | 43% |
| Monday | 95°F | Chance Showers And Thunderstorms | 5 mph WSW | 43% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NE | 18% |
| Tuesday | 91°F | Mostly Sunny | 10 mph NNE | 11% |
| Tuesday Night | 71°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 92°F | Mostly Sunny | 5 to 10 mph ENE | 7% |
| Wednesday Night | 72°F | Partly Cloudy | 5 to 10 mph E | 2% |
| Thursday | 92°F | Mostly Sunny | 5 to 10 mph E | 4% |
| Thursday Night | 73°F | Partly Cloudy | 5 to 10 mph E | 2% |
| Friday | 92°F | Mostly Sunny | 5 to 10 mph ESE | 3% |
| Friday Night | 73°F | Mostly Cloudy | 5 to 10 mph E | 3% |
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.