Westminster, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westminster, a community in Collin County, Texas.
This Afternoon
99°F
Sunny
Sunny. High near 99, with temperatures falling to around 97 in the afternoon. Heat index values as high as 101. South southeast wind around 10 mph.
7-day forecast for Westminster
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 10 mph SSE | 0% |
| Tonight | 73°F | Clear | 5 mph S | 0% |
| Saturday | 98°F | Sunny | 5 to 10 mph S | 0% |
| Saturday Night | 74°F | Mostly Clear | 5 to 10 mph S | 0% |
| Sunday | 98°F | Mostly Sunny | 5 to 10 mph S | 10% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SSW | 47% |
| Monday | 94°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph WSW | 47% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NE | 19% |
| Tuesday | 92°F | Mostly Sunny | 10 mph NNE | 11% |
| Tuesday Night | 69°F | Partly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 92°F | Mostly Sunny | 10 mph ENE | 8% |
| Wednesday Night | 69°F | Partly Cloudy | 5 to 10 mph ENE | 2% |
| Thursday | 92°F | Sunny | 5 to 10 mph E | 6% |
| Thursday Night | 69°F | Partly Cloudy | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Westminster (33.365, -96.459). Updated through the day.
Growing snapshot for Westminster
Last spring frost
Mar 17
First fall frost
Nov 15
Growing season
241 days
Hardiness zone
8b
More local growing data for Westminster: nearby ZIP 75409 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Mckinney Municipal Airport, Tx (12.2 mi from Westminster). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.