Duncanville, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Duncanville, a city in Dallas County, Texas.
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 100. South wind 5 to 10 mph.
7-day forecast for Duncanville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 5 to 10 mph S | 0% |
| Tonight | 77°F | Mostly Clear | 5 to 10 mph S | 0% |
| Wednesday | 101°F | Sunny | 5 to 10 mph SSW | 0% |
| Wednesday Night | 77°F | Mostly Clear | 5 to 10 mph S | 0% |
| Thursday | 100°F | Sunny | 5 to 10 mph S | 1% |
| Thursday Night | 77°F | Mostly Clear | 5 to 10 mph SSE | 1% |
| Friday | 100°F | Sunny | 5 to 10 mph S | 9% |
| Friday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 9% |
| Saturday | 97°F | Sunny | 5 mph S | 7% |
| Saturday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 7% |
| Sunday | 97°F | Sunny | 5 to 10 mph S | 5% |
| Sunday Night | 76°F | Mostly Clear | 10 mph SSE | 5% |
| Monday | 97°F | Sunny | 10 mph S | 6% |
| Monday Night | 76°F | Mostly Clear | 10 mph S | 6% |
Forecast source: National Weather Service (api.weather.gov) for Duncanville (32.646, -96.914). Updated through the day.
Growing snapshot for Duncanville
Last spring frost
Mar 20
First fall frost
Nov 13
Growing season
236 days
Hardiness zone
8b
More local growing data for Duncanville: nearby ZIP 75137 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Joe Pool Lake, Tx (3.6 mi from Duncanville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.