Ono-i-lau Weather in September

September in Ono-i-lau sees daytime temperatures around 25°C (77°F) and lows of 22°C (72°F) at night. With around 115 mm (4.5 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Ono-i-lau in September

Typically, about 16 days will experience rainfall, with an average of 115 mm (4.5 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Ono-i-lau in September

September in Ono-i-lau brings typical temperatures with highs around 25°C (77°F) and lows of 22°C (72°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights are mild at around 22°C (72°F), which is comfortable for most people.

Average water temperature in September

With water at 24°C (75°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period, it feels comfortable straight away.

For Ono-i-lau itself, July and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.