Allen, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Allen, a city in Collin County, Texas.
Tonight
50°F
Mostly Clear
Mostly clear. Low around 50, with temperatures rising to around 52 overnight. Northwest wind 5 to 10 mph.
7-day forecast for Allen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Wednesday | 71°F | Mostly Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 50°F | Partly Cloudy then Patchy Fog | 0 to 5 mph S | 0% |
| Thursday | 76°F | Mostly Sunny | 5 to 10 mph SSW | 12% |
| Thursday Night | 50°F | Partly Cloudy | 5 to 10 mph NNW | 13% |
| Friday | 70°F | Sunny | 10 mph N | 0% |
| Friday Night | 45°F | Mostly Clear | 5 mph N | 0% |
| Saturday | 67°F | Mostly Sunny | 5 mph N | 1% |
| Saturday Night | 45°F | Partly Cloudy | 0 to 5 mph N | 5% |
| Sunday | 69°F | Sunny | 5 mph NNW | 2% |
| Sunday Night | 44°F | Clear | 0 to 5 mph ESE | 1% |
| Monday | 71°F | Sunny | 0 to 5 mph S | 1% |
| Monday Night | 47°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 74°F | Sunny | 5 to 10 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Allen (33.110, -96.673). Updated through the day.
Growing snapshot for Allen
Last spring frost
Mar 18
First fall frost
Nov 11
Growing season
239 days
Hardiness zone
8b
More local growing data for Allen: nearby ZIP 75013 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Mckinney Muni Ap, Tx (7.5 mi from Allen). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.