Weatheo

McKinney Weather by Month

Average temperatures, rainfall and humidity for McKinney, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical McKinney month looks like before you travel — then check the live McKinney forecast for the days ahead.

Warmest month

August

36°C average high

Coolest month

January

3°C average low

Wettest month

May

132 mm of rain

Driest month

July

43 mm of rain

Average temperature and rainfall in McKinney by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January14°C3°C-13°C / 28°C
46 mm
65%14 km/h
February17°C6°C-18°C / 33°C
61 mm
66%16 km/h
March22°C10°C-12°C / 34°C
73 mm
63%17 km/h
April25°C14°C2°C / 34°C
86 mm
65%17 km/h
May28°C18°C4°C / 37°C
132 mm
70%15 km/h
June33°C23°C15°C / 39°C
66 mm
68%14 km/h
July35°C25°C17°C / 42°C
43 mm
63%13 km/h
August36°C25°C18°C / 43°C
48 mm
61%12 km/h
September32°C21°C12°C / 42°C
68 mm
65%11 km/h
October26°C15°C-1°C / 36°C
106 mm
64%14 km/h
November20°C9°C-6°C / 33°C
62 mm
67%14 km/h
December16°C6°C-12°C / 29°C
96 mm
68%14 km/h

Best time to visit McKinney

The most comfortable time to visit McKinney is generally March to April and November, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around May, totalling about 888 mm a year.

Travellers who prefer heat should aim for August, when highs average 36°C. May is the month to avoid if rain would spoil your plans — it averages 132 mm, roughly 3× the rainfall of the driest month (July).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the McKinney forecast for what is happening now.

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