Koror City Weather in September
During September, Koror City experiences high daytime temperatures of 29°C (84°F) and cooler nights around 26°C (79°F). September sits within the rainy season, so expect regular and often heavy rainfall.
Rainfall in Koror City in September
Koror City is in the rainy season in September, with rain on around 16 days and an average of 287 mm (11 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Koror City in September
Koror City in September gets highs of 29°C (84°F) during the day and drops to 26°C (79°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 26°C (79°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Koror City in September
There are approximately 200 hours of sunshine this month, despite being the rainy season. Rain often arrives in the late afternoon or evening, keeping mornings and early afternoons sunny. Even during the wet season, it could still be a nice time to visit.September in Koror City has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Palau, check out our Koror City's climate page.
Koror City Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
53%
Precipitation
287 mm (11 in)
Rainy days
16 days
Sunshine
200 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koror City typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Historical weather for Koror City in September
Browse day-by-day weather records for Koror City spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koror City historical weather extremes in September
The extremes listed below come from historical weather data collected in Koror City from 1976 through 2025.
- Koror City recorded its highest September temperature of 33°C (91°F) on September 5, 2017.
- Koror City experienced its chilliest September day on September 23, 2021, reaching only 26°C (79°F).
- The coldest night in September in Koror City was on September 26, 2025, with a minimum of 22°C (72°F).
Best Places in Palau in September
Find out more about the weather in Palau and which places have the best travel conditions in this month. See all of Palau in September →
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What to Wear in Koror City in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Koror City 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 Palau, check out our Koror City's climate page.
See the full Koror City climate overview or explore weather in Palau.
