Weather in Indonezija in september
Country-wide climate normals across 42 cities in Indonezija.
How Hot Is Indonezija in september?
Indonezija sees consistently hot September weather — average highs of 31°C, average lows of 23°C, with minimal regional differences. Whether you're in Jakarta or one of the coastal cities, conditions feel broadly the same: hot, generally clear, with little night-time relief.
Sunshine in Indonezija in september
Limited sunshine and short daylight define Indonezija's September: Jakarta averages just 2.3h of direct sun, with the sun up between 5:45 am and 5:50 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In Indonezija In september?
Wet conditions dominate Indonezija in September — Jakarta sees 173mm of rain across 17 days, with rain a near-daily feature in most regions. Some areas see considerably more, particularly mountain-facing or windward coasts. Plan around frequent showers and pack reliable rainwear.
Is Indonezija Humid In september?
Indonezija feels humid through September: 74% in Jakarta, similar nationwide. Warm days feel several degrees hotter than the thermometer suggests, and morning mist or post-rain steam is common. Drier upland or interior regions may feel a bit less oppressive.
Wind In Indonezija In september
Indonezija's September has gentle wind — Jakarta averages 12 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In Indonezija In september
Cloudy skies dominate Indonezija in September — 68% cover in Jakarta, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.