Sunnyvale, TX Weather & Growing Conditions
Overnight
73°F
Mostly Clear
Mostly clear. Low around 73, with temperatures rising to around 75 overnight. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Mostly Clear | 5 mph S | 0% |
| Saturday | 100°F | Sunny | 5 to 10 mph S | 0% |
| Saturday Night | 74°F | Mostly Clear | 5 to 10 mph SSE | 0% |
| Sunday | 100°F | Mostly Sunny | 5 to 10 mph S | 8% |
| Sunday Night | 74°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSE | 39% |
| Monday | 97°F | Chance Showers And Thunderstorms | 5 mph W | 39% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph NNE | 20% |
| Tuesday | 94°F | Mostly Sunny | 5 to 10 mph NNE | 10% |
| Tuesday Night | 70°F | Partly Cloudy | 5 to 10 mph NE | 10% |
| Wednesday | 94°F | Mostly Sunny | 5 to 10 mph ENE | 7% |
| Wednesday Night | 69°F | Partly Cloudy | 5 mph ENE | 3% |
| Thursday | 93°F | Mostly Sunny | 5 mph E | 2% |
| Thursday Night | 69°F | Partly Cloudy | 5 mph E | 1% |
| Friday | 93°F | Mostly Sunny | 5 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sunnyvale, TX
Last spring frost
Mar 10
First fall frost
Nov 19
Growing season
254 days
Hardiness zone
8b
Explore more for Sunnyvale, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Lavon Dam, Tx (16.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.