McKinney Weather in September

September in McKinney sees daytime temperatures around 32°C (90°F) and lows of 19°C (66°F) at night. With around 78 mm (3.1 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in McKinney in September

Historically, September sees about 6 days of rain, with a monthly average of 78 mm (3.1 in). Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.

Temperature in McKinney in September

Expect highs of 32°C (90°F) in McKinney in September, with nights dropping to around 19°C (66°F). For most visitors, the main thing to prepare for is the heat during the day. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in McKinney in September

Expect sunny days throughout the month, with an estimated 248 hours of sunshine. This makes it a pleasant time to visit McKinney.

If you prefer dry days with pleasant temperatures, March, April, May, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.