Allen, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Allen, a city in Collin County, Texas.
Today
101°F
Sunny
Sunny, with a high near 101. Heat index values as high as 102. South wind 5 to 10 mph.
7-day forecast for Allen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 101°F | Sunny | 5 to 10 mph S | 2% |
| Tonight | 79°F | Mostly Clear | 5 to 10 mph SSE | 1% |
| Wednesday | 101°F | Sunny | 5 to 10 mph SSW | 2% |
| Wednesday Night | 80°F | Mostly Clear | 10 mph S | 0% |
| Thursday | 100°F | Sunny | 10 mph S | 1% |
| Thursday Night | 79°F | Mostly Clear | 10 mph SSE | 1% |
| Friday | 98°F | Sunny | 5 to 10 mph S | 9% |
| Friday Night | 78°F | Mostly Clear | 5 to 10 mph SSE | 9% |
| Saturday | 97°F | Sunny | 5 to 10 mph S | 8% |
| Saturday Night | 78°F | Mostly Clear | 10 mph SSE | 8% |
| Sunday | 97°F | Sunny | 5 to 10 mph S | 4% |
| Sunday Night | 78°F | Mostly Clear | 10 mph SSE | 4% |
| Monday | 98°F | Sunny | 10 to 15 mph S | 4% |
| Monday Night | 78°F | Mostly Clear | 10 to 15 mph S | 4% |
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 Aug 4, 2026.