Sumbawa Besar Weather in September
September in Sumbawa Besar averages 32°C (90°F) during the day and 22°C (72°F) at night. With only 8.9 mm (0.4 in) of rainfall expected on average, it's a largely dry month.
Rainfall in Sumbawa Besar in September
Looking at the last 30 years, the data shows about 2 days with rain, averaging 8.9 mm (0.4 in) for the month. On the rare occasion it rains, expect a brief, moderate shower rather than a heavy downpour.
Temperature in Sumbawa Besar in September
Weather in Sumbawa Besar is at its excellent in September. Highs reach 32°C (90°F), while nights settle around 22°C (72°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Sumbawa Besar's climate page.
Sumbawa Besar Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
32°C (90°F)
Chance of Rain
5%
Precipitation
8.9 mm (0.4 in)
Rainy days
2 days
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Sumbawa Besar typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in September
Daily Historical Precipitation
47-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Sumbawa Besar in September
Browse day-by-day weather records for Sumbawa Besar spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sumbawa Besar historical weather extremes in September
Based on weather observations in Sumbawa Besar between 2001 and 2025, these are the recorded extremes during September.
- Sumbawa Besar recorded its highest September temperature of 37°C (99°F) on September 30, 2024.
- The coldest September day was on September 23, 2003, with a maximum of 24°C (75°F).
- The coldest night in September in Sumbawa Besar was on September 2, 2006, with a minimum of 18°C (64°F).
Best Places in Indonesia in 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 →
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What to Wear in Sumbawa Besar in September
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). Almost no rain is expected, so no need to bring rain gear.What To Do in Sumbawa Besar in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Sumbawa Besar's climate page.
See the full Sumbawa Besar climate overview or explore weather in Indonesia.
