Weather in Indonézia in september
Country-wide climate normals across 42 cities in Indonézia.
How Hot Is Indonézia in september?
Uniform heat across Indonézia's September: averages climb to 31°C nationally with overnight lows of 23°C, narrow spread from coast to interior. The hottest cities like Semarang register similar readings to the coolest, so plan for consistently hot weather across the country.
Sunshine in Indonézia in september
Indonézia sees limited sun in September: just 2.3h a day in Jakarta, with heavy cloud cover common across most regions. Daylight runs from 5:45 am to 5:50 pm, but persistent grey skies and overcast stretches mean direct sunlight is genuinely scarce. Many days pass without any prolonged sunny spells.
Does It Rain In Indonézia In september?
Heavy rain shapes Indonézia's September: Jakarta averages 173mm across 17 days, and most regions of the country see similar persistent wet conditions. Long sunny stretches are rare. Expect rain on roughly two out of every three days.
Is Indonézia Humid In september?
Indonézia's September is humid — 74% on average in Jakarta, with similar muggy conditions in most regions. Afternoons feel sticky, especially after rain, and the moisture amplifies warm-day temperatures noticeably. Coastal cities see the highest readings.
Wind In Indonézia In september
Indonézia'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 Indonézia In september
Cloudy skies dominate Indonézia 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.