Bangkok Weather in September

September: rain shapes the day

September feels hot, sticky and very wet. Highs reach 31°C, and rain falls on 27 days, often in heavy bursts. The sky stays cloudy, so don't count on much sunshine. It's wetter than August or October in the data, and the humidity can make long walks tiring.

Plan indoor stops around the weather. The Bangkok Art and Culture Centre near Siam, or the air-conditioned malls around Siam Square, work well during downpours. Visit Wat Pho in a dry spell, then take a break nearby if the rain returns. Avoid packing your day with long outdoor walks or river trips; downpours can make getting around slower.

Events and a quieter city

The Bangkok International Festival of Dance and Music usually runs around September and October at the Thailand Cultural Centre. It's a good option for an evening indoors, though dates and performances vary.

September is low season, so you'll generally find fewer visitors and lower hotel prices than during Bangkok's busy December period. Rain is the trade-off. If you hate crowds, this can be a calmer time to visit the Grand Palace, but rain may interrupt your plans.

Getting around in the rain

Travelling with kids? Keep a mall or museum in reserve for sudden downpours.

When rain hits, traffic around central Bangkok can crawl. Use the BTS Skytrain or MRT for trips between places like Siam and Sukhumvit, rather than relying on a taxi through wet roads. Around Siam, the covered walkways link several malls, so you can move between them without stepping outside. For a quick local meal, try boat noodles at Victory Monument when the weather eases.