McKinney, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKinney, 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, with gusts as high as 20 mph.
7-day forecast for McKinney
| 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 NW | 0% |
| Wednesday Night | 50°F | Partly Cloudy then Patchy Fog | 0 mph | 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 | 5 to 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 | 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 NNW | 1% |
| Monday | 71°F | Sunny | 0 to 5 mph SSW | 1% |
| Monday Night | 47°F | Clear | 0 to 5 mph S | 0% |
| Tuesday | 74°F | Sunny | 0 to 5 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for McKinney (33.201, -96.664). Updated through the day.
Growing snapshot for McKinney
Last spring frost
Mar 17
First fall frost
Nov 15
Growing season
241 days
Hardiness zone
8b
More local growing data for McKinney: nearby ZIP 75072 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Mckinney Municipal Airport, Tx (6.3 mi from McKinney). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.