Lewisville, TX Weather & Growing Conditions
Today
102°F
Sunny
Sunny, with a high near 102. Heat index values as high as 103. South wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 102°F | Sunny | 5 to 10 mph S | 0% |
| Tonight | 82°F | Mostly Clear | 5 to 10 mph SSE | 0% |
| Wednesday | 101°F | Sunny | 5 to 10 mph SSW | 1% |
| Wednesday Night | 81°F | Mostly Clear | 10 mph S | 0% |
| Thursday | 101°F | Sunny | 5 to 10 mph S | 1% |
| Thursday Night | 81°F | Mostly Clear | 10 mph SSE | 1% |
| Friday | 99°F | Sunny | 5 to 10 mph S | 8% |
| Friday Night | 80°F | Mostly Clear | 5 to 10 mph SSE | 8% |
| Saturday | 98°F | Sunny | 5 to 10 mph S | 6% |
| Saturday Night | 79°F | Mostly Clear | 5 to 10 mph SSE | 6% |
| Sunday | 99°F | Sunny | 5 to 10 mph S | 4% |
| Sunday Night | 79°F | Mostly Clear | 10 mph SSE | 3% |
| Monday | 99°F | Sunny | 10 mph S | 3% |
| Monday Night | 80°F | Mostly Clear | 10 mph S | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lewisville, TX
Last spring frost
Mar 14
First fall frost
Nov 17
Growing season
249 days
Hardiness zone
8b
Explore more for Lewisville, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Grapevine Dam, Tx (8.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.