Sunnyvale, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sunnyvale, a town in Dallas County, Texas.
Tonight
52°F
Mostly Clear
Mostly clear. Low around 52, with temperatures rising to around 54 overnight. Northwest wind around 5 mph.
7-day forecast for Sunnyvale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 71°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 50°F | Patchy Fog | 0 mph | 0% |
| Thursday | 76°F | Patchy Fog then Mostly Sunny | 0 to 10 mph SSW | 12% |
| Thursday Night | 51°F | Mostly Clear | 5 to 10 mph NW | 13% |
| Friday | 70°F | Sunny | 5 to 10 mph N | 0% |
| Friday Night | 47°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 67°F | Mostly Sunny | 5 mph N | 1% |
| Saturday Night | 46°F | Partly Cloudy | 0 to 5 mph N | 6% |
| Sunday | 68°F | Sunny | 0 to 5 mph NNW | 2% |
| Sunday Night | 45°F | Clear | 0 mph | 1% |
| Monday | 71°F | Sunny | 0 to 5 mph SE | 1% |
| Monday Night | 46°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 74°F | Sunny | 0 to 5 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Sunnyvale (32.800, -96.559). Updated through the day.
Growing snapshot for Sunnyvale
Last spring frost
Mar 10
First fall frost
Nov 19
Growing season
254 days
Hardiness zone
8b
More local growing data for Sunnyvale: nearby ZIP 75182 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
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Glenn Heights
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Wilmer
Climate data from the nearest NOAA station, Lavon Dam, Tx (16.6 mi from Sunnyvale). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.