What September feels like in Bali
September falls in Bali's wet season — the rainfall numbers rise clearly above the dry months. The midday hours are hot; shade and water matter on long walks. Nights bring little relief: even the coolest hour of the night stays very warm. Thick, humid air means clothes cling and the heat feels stronger than the number.
Rain in Bali in September
Dry days are the exception, with rain on most days. When rain comes it is heavy, about 10.7 mm (0.4 in) per wet day, often in short, strong bursts. Across the year Bali averages about 11.1 mm per rainy day, so September is typical. It is among the three wettest months of the year.
Daylight and sunshine in September
On 15 September the sun rises at about 6:14 am and sets around 6:16 pm local time, giving 12 h 3 min of daylight. Since mid-August the day has gained 13 min. Close to the equator, sunrise and sunset times move very little through the year. The sun is out for roughly 67% of those daylight hours, so there are plenty of bright spells.
How September compares to the rest of the year
In Bali's temperature order, September sits as the 6th coolest month. It is about as warm as August, with 71 mm less rain. Temperatures barely move from one month to the next here. October averages a high of 30.6°C (87.1°F).
Who September suits
- Sightseeing: less ideal — rain falls on more than half the days.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Beach: less ideal — too many rainy days.
- Hiking: less ideal — too hot for long hikes.
- Museums & indoor: a good choice — with rain on most days, galleries and museums make easy plans.
Tips for visiting Bali in September
Rain Protection
A compact umbrella and a light waterproof jacket.
Sun Protection
Protect yourself from strong sun: hat, SPF and plenty of water.
Quick questions
How warm is Bali in September?
Afternoons average 31°C (87.8°F) and nights about 25.6°C (78.1°F) — hot by most people's standards. It is the 6th coolest month of the year.
Does it rain a lot in Bali in September?
Yes, fairly — rain falls most days and totals about 278 mm, so an umbrella is worth carrying.
What should I wear in Bali in September?
The numbers point to rain protection and sun protection. There is little need to change for the evening.
Is September or October better for visiting Bali?
October scores better on our climate ranking (#6 of 12 vs #9), rated Good against Fair. October has fewer rainy days.