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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Fiji, check out our Ono-i-lau's climate page.
Ono-i-lau Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
25°C (77°F)
Water Temperature
24°C (75°F)
Chance of Rain
54%
Precipitation
115 mm (4.5 in)
Rainy days
16 days
Humidity
78%
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Ono-i-lau typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are warm, with lows typically ranging from 20°C (68°F) to 22°C (72°F).
Average temperatures in September
Daily Historical Precipitation
43-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 Ono-i-lau in September
Browse day-by-day weather records for Ono-i-lau spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Best Places in Fiji in September
Find out more about the weather in Fiji and which places have the best travel conditions in this month. See all of Fiji in September →
perfect weather
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tolerable
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What to Wear in Ono-i-lau in September
For Ono-i-lau in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 24°C (75°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes.What To Do in Ono-i-lau 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 Fiji, check out our Ono-i-lau's climate page.
Temperature Rainfall Humidity Water Temp
See the full Ono-i-lau climate overview or explore weather in Fiji.
