McKinney, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKinney, a city in Collin County, Texas.
Overnight
76°F
Mostly Clear
Mostly clear. Low around 76, with temperatures rising to around 78 overnight. South wind around 5 mph.
7-day forecast for McKinney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 76°F | Mostly Clear | 5 mph S | 0% |
| Saturday | 99°F | Mostly Sunny | 5 to 15 mph S | 0% |
| Saturday Night | 77°F | Mostly Clear | 10 to 15 mph S | 0% |
| Sunday | 99°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 20% |
| Sunday Night | 75°F | Chance Showers And Thunderstorms | 5 mph SSE | 47% |
| Monday | 95°F | Chance Showers And Thunderstorms | 5 mph WSW | 47% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NNE | 16% |
| Tuesday | 91°F | Mostly Sunny | 10 mph NNE | 12% |
| Tuesday Night | 68°F | Partly Cloudy | 5 to 10 mph NE | 9% |
| Wednesday | 91°F | Mostly Sunny | 5 to 10 mph ENE | 9% |
| Wednesday Night | 69°F | Partly Cloudy | 5 to 10 mph E | 2% |
| Thursday | 91°F | Mostly Sunny | 5 mph E | 5% |
| Thursday Night | 69°F | Partly Cloudy | 5 to 10 mph E | 2% |
| Friday | 92°F | Mostly Sunny | 5 mph E | 3% |
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 Sep 19, 2026.