Koror weather by month
Koror runs from about 26°C in July to 28°C in May, with July the wettest month at 1163 mm.
warmest month
May
28°C
coolest month
July
26°C
wettest month
July
1163 mm
worst air month
April
8 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 27°C | 443 mm | 280 h | 6 |
| February | 27°C | 186 mm | 283 h | 5 |
| March | 28°C | 120 mm | 342 h | 5 |
| April | 28°C | 379 mm | 261 h | 8 |
| May | 28°C | 333 mm | 276 h | 3 |
| June | 27°C | 803 mm | 242 h | 4 |
| July | 26°C | 1163 mm | 179 h | 5 |
| August | 27°C | 495 mm | 307 h | 3 |
| September | 27°C | 664 mm | 216 h | 3 |
| October | 27°C | 426 mm | 252 h | 3 |
| November | 27°C | 390 mm | 274 h | 4 |
| December | 27°C | 619 mm | 247 h | 4 |
About 3,159 hours of sun a year. Roughly 331 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.