Jakarta weather by month
Jakarta runs from about 27°C in January to 28°C in October, with January the wettest month at 352 mm.
warmest month
October
28°C
coolest month
January
27°C
wettest month
January
352 mm
worst air month
October
94 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 27°C | 352 mm | 269 h | 47 |
| February | 27°C | 266 mm | 256 h | 48 |
| March | 27°C | 275 mm | 270 h | 56 |
| April | 27°C | 282 mm | 291 h | 70 |
| May | 28°C | 218 mm | 314 h | 79 |
| June | 27°C | 144 mm | 318 h | 90 |
| July | 27°C | 97 mm | 339 h | 93 |
| August | 28°C | 38 mm | 357 h | 93 |
| September | 28°C | 126 mm | 328 h | 91 |
| October | 28°C | 106 mm | 340 h | 94 |
| November | 28°C | 267 mm | 273 h | 56 |
| December | 27°C | 330 mm | 239 h | 56 |
About 3,594 hours of sun a year. Roughly 244 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 2026-05-22. Full method, licences and the list of sources we rejected are on the methodology page.