The climate in Sandakan during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Sandakan and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 23°C (73°F) is normal.
|Daytime temperature||32°C 89.6°F|
|Nightly temperature||23°C 73.4°F|
|Average temperature||27.5°C 81.5°F|
|Daily sunshine||6.8 hrs|
|Avg rainfall||231 mm 9.1 ins|
|Rainy days||18 days|
|Sea temperature||29.3°C 84.8°F|
|Windspeed||5.4kph 3 mph|
On average September is the 6th wettest month of the year in Sandakan with around 231mm 9.1 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sandakan in September 2023.
|Hottest month:||May||32.3°C 90.1°F|
|Driest month:||April||120mm 4.7ins|
|Coldest month:||January||29.2°C 84.6°F|
|Wettest month:||January||443mm 17.4ins|