McKinney, TX Weather & Growing Conditions
Tonight
50°F
Mostly Clear
Mostly clear. Low around 50, with temperatures rising to around 52 overnight. Northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 71°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 50°F | Partly Cloudy then Patchy Fog | 0 to 5 mph SE | 0% |
| Thursday | 75°F | Mostly Sunny | 5 to 10 mph SSW | 12% |
| Thursday Night | 49°F | Partly Cloudy | 5 to 10 mph NNW | 13% |
| Friday | 69°F | Sunny | 10 mph N | 0% |
| Friday Night | 45°F | Mostly Clear | 5 mph N | 0% |
| Saturday | 66°F | Mostly Sunny | 5 mph N | 1% |
| Saturday Night | 44°F | Partly Cloudy | 0 to 5 mph N | 4% |
| Sunday | 69°F | Sunny | 0 to 5 mph NNW | 2% |
| Sunday Night | 44°F | Clear | 0 to 5 mph ENE | 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 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for McKinney, TX
Last spring frost
Mar 17
First fall frost
Nov 15
Growing season
241 days
Hardiness zone
8b
Explore more for McKinney, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Mckinney Municipal Airport, Tx (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.