Round Rock, TX Weather & Growing Conditions
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 105. South wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 5 to 10 mph S | 2% |
| Tonight | 76°F | Mostly Clear | 5 to 10 mph S | 2% |
| Wednesday | 99°F | Sunny | 5 to 10 mph S | 1% |
| Wednesday Night | 76°F | Mostly Clear | 5 to 10 mph S | 1% |
| Thursday | 99°F | Sunny | 5 mph S | 4% |
| Thursday Night | 76°F | Partly Cloudy | 5 to 10 mph SSE | 4% |
| Friday | 98°F | Sunny | 5 mph S | 6% |
| Friday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 6% |
| Saturday | 96°F | Sunny | 5 mph SSE | 5% |
| Saturday Night | 76°F | Mostly Clear | 5 mph SSE | 3% |
| Sunday | 96°F | Sunny | 5 mph S | 5% |
| Sunday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 5% |
| Monday | 97°F | Mostly Sunny | 5 to 10 mph S | 5% |
| Monday Night | 76°F | Mostly Clear | 10 mph S | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Round Rock, TX
Last spring frost
Mar 11
First fall frost
Nov 20
Growing season
254 days
Hardiness zone
9a
Explore more for Round Rock, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Austin Great Hills, Tx (9.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.