Cancun Weather in September

Visiting Cancun in September

September is hot and very humid in Cancun: expect highs around 30°C, lows near 27°C and humidity of 82%. Rain averages 152 mm across 23 days, with about 5.6 hours of sun a day. That usually means a mix of showers and brighter spells, not a washout every day, but outdoor plans can be interrupted. Visit El Rey Archaeological Zone or walk the Hotel Zone's beaches earlier in the day, before the heat builds; keep afternoons flexible for a sudden downpour. Long boat trips and snorkelling can be less reliable when storms roughen the water. September is also within the Atlantic hurricane season, so weather disruptions are possible.

Independence Day and low-season trade-offs

Mexican Independence Day falls on September 16, with celebrations around the country; in Cancun, look for the "Grito" festivities in the city centre on the night of September 15. The Hotel Zone is generally quieter than during winter high season and busy holiday periods, and September can bring lower hotel rates. The trade-off is unsettled weather and a greater chance of changes to beach or boat plans. The month's comfort rating is poor, so it suits travellers who value a quieter resort stay more than guaranteed sunshine.

A practical Cancun tip

If you're taking the ferry from Puerto Juárez to Isla Mujeres, keep your return plans flexible: rain or rough seas can affect crossings. On a calmer spell, the island's Playa Norte is an easy beach day; if the weather turns, head back to Cancun rather than counting on a full day out at sea.