Weather in Bandung in September

A good month. September is a solid month to be in Bandung. The heat itself is manageable at 28.1 °C, but 84% humidity is what you will actually feel.

September ranks 3 of 12 in Bandung. Only August scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 12 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 84% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average September reaches 30 °C. Across the twenty years measured, the hottest September day reached 30.7 °C and the coldest night fell to 14.6 °C, and the wettest single day dropped 51 mm — roughly 57% of the month's rain in one day.

This is the volatile part. September rainfall has ranged from 6 mm to 437 mm across the twenty years measured — a 431 mm spread around an average of 89 mm. The average is real but almost no individual September looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 5.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, high enough to notice on the warm days without dominating them.

How September sits in the year

Temperatures hold steady either side: 27.2 °C in August, 28.1 here, 28.5 in October. Nothing about the timing within the month matters much. Rain is the thing that moves: October brings 8 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in September

Bandung sits close enough to the equator that daylight barely moves all year — 12.1 hours in September, against a range of just 0.8 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 10.8 °C between the year's warmest afternoons and coldest nights. At 714 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself. September is the value pick for Bandung: it scores within 11 points of August without carrying August's prices.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

September in Bandung versus nearby

If Bandung is one option among several, the nearby comparison is worth making. Jakarta is close enough to be a coin toss — 2.4 °C warmer, the same number of rain days. Bandar Lampung is close enough to be a coin toss — 3.2 °C warmer, 3 days less rain.

So: September works, with August the better month by 11 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Bandung

See all twelve months in Bandung, or where else to go in September.