McAllen Weather in September

Thinking of visiting McAllen in September? Expect very high temperatures reaching 34°C (93°F) during the day, dropping to 23°C (73°F) at night, and be prepared for the wettest month of the year.

Rainfall in McAllen in September

As the rainiest month, carrying an umbrella is advisable to manage the frequent rain. You can expect rain on roughly 11 days based on historical data, averaging 129 mm (5.1 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in McAllen in September

If you're visiting McAllen in September, expect highs of 34°C (93°F) and overnight lows around 23°C (73°F). It's usually most comfortable outside during the morning and later in the day. At 23°C (73°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

September in McAllen has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.