Winters in McKinney are mild and variable, with temperatures often fluctuating between freezing and moderate levels. January is the coldest month, with temperatures averaging around 8°C, while February can be even chillier, with an average of 5°C. Spring brings a noticeable warming trend, with March and April temperatures gradually increasing to averages of 15°C and 17°C respectively. Summers are warm but not scorching, with July and August temperatures peaking at around 27-28°C on average. Autumn is similar in temperature profile to spring, with September and October averaging around 25°C and 21°C, before dropping again in November.