McKinney, TX Weather & Growing Conditions
Overnight
75°F
Mostly Clear
Mostly clear. Low around 75, with temperatures rising to around 77 overnight. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 75°F | Mostly Clear | 5 mph S | 0% |
| Saturday | 99°F | Sunny | 5 to 15 mph S | 0% |
| Saturday Night | 76°F | Mostly Clear | 10 to 15 mph SSE | 0% |
| Sunday | 99°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 20% |
| Sunday Night | 74°F | Chance Showers And Thunderstorms | 5 mph SSE | 48% |
| Monday | 95°F | Chance Showers And Thunderstorms | 5 mph WSW | 48% |
| Monday Night | 70°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 | 10% |
| Wednesday Night | 68°F | Partly Cloudy | 5 mph ENE | 2% |
| Thursday | 92°F | Mostly Sunny | 5 mph E | 5% |
| Thursday Night | 69°F | Partly Cloudy | 5 mph E | 2% |
| Friday | 92°F | Mostly Sunny | 5 mph E | 3% |
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 (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.