Round Mountain, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Round Mountain, a town in Blanco County, Texas.
Tonight
72°F
Partly Cloudy
Partly cloudy, with a low around 72. South wind around 5 mph.
7-day forecast for Round Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Partly Cloudy | 5 mph S | 1% |
| Sunday | 95°F | Mostly Sunny | 0 to 5 mph SSW | 1% |
| Sunday Night | 72°F | Partly Cloudy | 5 mph SSE | 7% |
| Monday | 95°F | Sunny | 0 to 5 mph SSE | 9% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 16% |
| Tuesday | 93°F | Sunny | 0 to 5 mph E | 14% |
| Tuesday Night | 71°F | Partly Cloudy | 0 to 5 mph E | 14% |
| Wednesday | 93°F | Mostly Sunny | 0 to 5 mph ENE | 7% |
| Wednesday Night | 71°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Thursday | 93°F | Mostly Sunny | 0 to 10 mph E | 2% |
| Thursday Night | 70°F | Partly Cloudy | 0 to 5 mph SE | 2% |
| Friday | 93°F | Mostly Sunny | 0 to 5 mph ESE | 1% |
| Friday Night | 70°F | Partly Cloudy | 0 to 5 mph SE | 1% |
| Saturday | 93°F | Mostly Sunny | 0 to 5 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Round Mountain (30.394, -98.361). Updated through the day.
Growing snapshot for Round Mountain
Last spring frost
Mar 22
First fall frost
Nov 9
Growing season
235 days
Hardiness zone
8b
More local growing data for Round Mountain: nearby ZIP 78663 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Johnson City 2N, Tx (9.9 mi from Round Mountain). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.