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September in Sidemen averages 28°C (82°F) during the day and 22°C (72°F) at night. The excellent conditions and moderate rainfall make it a solid month to visit.
If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Sidemen.
Pick a month to see the average temperature, rainfall and sunshine in Sidemen - and find the best time to visit.
48-year average (1976-2025)
Based on our historical records, temperatures in Sidemen typically stay consistent throughout September, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 24°C (75°F).
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Sidemen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Sidemen between 1991 and 2026, these are the recorded extremes during September.
Find out more about the weather in Indonesia and which places have the best travel conditions in this month. See all of Indonesia in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Sidemen climate overview or explore weather in Indonesia.
Where to go in September - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
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