Weir, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Weir, a city in Williamson County, Texas.
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.
7-day forecast for Weir
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 5 to 10 mph S | 1% |
| Tonight | 76°F | Mostly Clear | 5 to 10 mph S | 1% |
| Wednesday | 98°F | Sunny | 5 to 10 mph S | 1% |
| Wednesday Night | 76°F | Mostly Clear | 5 to 10 mph S | 1% |
| Thursday | 98°F | Sunny | 5 to 10 mph S | 3% |
| Thursday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 3% |
| Friday | 96°F | Sunny | 5 mph S | 5% |
| Friday Night | 75°F | Mostly Clear | 5 to 10 mph S | 5% |
| Saturday | 96°F | Sunny | 5 mph SSE | 5% |
| Saturday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 5% |
| Sunday | 96°F | Sunny | 5 to 10 mph S | 4% |
| Sunday Night | 75°F | Mostly Clear | 5 to 10 mph SSE | 4% |
| Monday | 96°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) for Weir (30.677, -97.591). Updated through the day.
Growing snapshot for Weir
Last spring frost
Mar 6
First fall frost
Nov 24
Growing season
259 days
Hardiness zone
9a
More local growing data for Weir: nearby ZIP 78674 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Georgetown Lake, Tx (7.3 mi from Weir). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.