September · Palau
Best time to visit Koror in September Weather, crowds & prices
Weather in Koror in September
Average temperature 28°C, 502 mm of rain, about 21 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
3.2/10
Ranked #9 of 12 months
- Avg temp
- 28°C
- Rainfall
- 502 mm
- Humidity
- 80%
- Days with 6h+ sun
- 21
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Koror scores 3.2/10 for sightseeing and cultural travel - ranked #9 of 12. Expect around 28°C, 502 mm of rain, and roughly 21 days with 6+ hours of sunshine this month.
Koror is Palau's commercial and marine-tourism hub, linking museums, local food, WWII history, dive operators, and boat routes into the Rock Islands.
September in Koror — off-season conditions
Days in September average 28°C (82°F) and humidity near 80% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 502 mm, but with about 21 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 3.2/10 on the same scale — 9th of 12 months, versus 3.3/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
Frequently asked
- What is the weather like in Koror in September?
- In September, Koror averages 28°C, 502 mm of rain, and about 21 days with 6+ hours of sunshine. Its climate-comfort score is 3.2/10.
- Is September a good time to visit Koror?
- September earns a 3.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Koror in September?
- Expect about 502 mm of rain in September. Average humidity is 80% and there are about 21 days with 6+ hours of sunshine.
Curated in Koror
Tickets & experiences
Things to do in Koror
Koror, Palau. Live activities and tours from GetYourGuide, matched to this destination.