Allen, TX Weather & Growing Conditions
Tonight
76°F
Clear
Clear. Low around 76, with temperatures rising to around 78 overnight. Heat index values as high as 98. South southeast wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 76°F | Clear | 5 to 10 mph SSE | 0% |
| Saturday | 98°F | Sunny | 5 to 10 mph SSW | 0% |
| Saturday Night | 76°F | Mostly Clear | 10 mph S | 0% |
| Sunday | 99°F | Mostly Sunny | 10 mph S | 9% |
| Sunday Night | 75°F | Chance Showers And Thunderstorms | 5 mph S | 48% |
| Monday | 94°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph SW | 48% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph ENE | 18% |
| Tuesday | 92°F | Mostly Sunny | 10 mph NNE | 12% |
| Tuesday Night | 70°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 92°F | Mostly Sunny | 10 mph ENE | 8% |
| Wednesday Night | 71°F | Partly Cloudy | 5 to 10 mph ENE | 3% |
| Thursday | 93°F | Mostly Sunny | 5 to 10 mph E | 5% |
| Thursday Night | 71°F | Partly Cloudy | 5 to 10 mph E | 5% |
| Friday | 92°F | Mostly Sunny | 5 to 10 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Allen, TX
Last spring frost
Mar 18
First fall frost
Nov 11
Growing season
239 days
Hardiness zone
8b
Explore more for Allen, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Mckinney Muni Ap, Tx (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.