Chattogram Weather in September

September: deep in the monsoon

September feels hot, sticky and very wet. Days reach 30°C, with high humidity and rain on 27 days. Heavy showers can interrupt plans, while thick cloud and little sunshine make beach time less reliable.

You can still explore indoor sights, browse shops around New Market or enjoy a long lunch of Chattogram's mezban beef. Keep plans flexible for outdoor trips. Patenga Beach can be windy and rough in monsoon weather, so don't count on a calm swim.

Events and crowds

September doesn't bring a major festival on a fixed date. Durga Puja, an important Hindu festival with celebrations in Chattogram, may fall in September or October; its dates change each year. If it does fall during your visit, expect local pandals—temporary worship spaces—to draw crowds.

If you hate crowds, September is generally quieter than the January and February high season. It's also part of the rainy-season low period, so accommodation may cost less than in the cooler, drier months. Rain can still affect journeys, so a low-season visit is best if you're happy to change plans.

Make room for rain

Travelling with kids? Keep a sheltered option in mind for afternoons, when showers can make outdoor sightseeing tricky.

September gets 455 mm of rain, less than August but more than October. That's still enough to disrupt road trips and muddy outdoor routes. Save a visit to Foy's Lake for a break in the weather, and ask locally about conditions before setting off.

For a practical local fix, try mezban beef at a well-known restaurant in the city rather than planning a long trip to eat it. This Chattogram speciality makes a rainy day's meal feel like part of the visit.