Sibu in September sees very high daytime temperatures of 32°C (90°F) and nighttime lows of 24°C (75°F). As part of the rainy season, showers are frequent and often heavy. Budget around 258 mm (10 in) of rainfall for the month.
For additional travel inspiration, our weather planner can help you discover destinations worldwide.
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Pick a month to see the average temperature, rainfall and sunshine in Sibu - and find the best time to visit.
49-year average (1976-2025)
Based on our historical records, temperatures in Sibu typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).
49-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 Sibu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 45 years of weather observations (1981-2026), these are the most extreme conditions recorded in Sibu.
Find out more about the weather in Malaysia and which places have the best travel conditions in this month. See all of Malaysia 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 but pleasant conditions in Sibu in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full Sibu climate overview or explore weather in Malaysia.
Where to go in September - average daytime high across popular destinations.
Kuching
32°C (90°F) Kuala Lumpur33°C (91°F) George Town31°C (88°F) Ipoh32°C (90°F) Pantai Cenang30°C (86°F) Johor Bahru31°C (88°F) Melaka30°C (86°F) Kota Kinabalu30°C (86°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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