Johor Bahru weather by month
Johor Bahru runs from about 26°C in January to 27°C in March, with January the wettest month at 515 mm.
warmest month
March
27°C
coolest month
January
26°C
wettest month
January
515 mm
worst air month
May
28 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 26°C | 515 mm | 210 h | 11 |
| February | 27°C | 134 mm | 297 h | 12 |
| March | 27°C | 149 mm | 329 h | 13 |
| April | 27°C | 308 mm | 255 h | 24 |
| May | 27°C | 426 mm | 274 h | 28 |
| June | 27°C | 324 mm | 271 h | 24 |
| July | 27°C | 115 mm | 315 h | 25 |
| August | 27°C | 204 mm | 307 h | 23 |
| September | 27°C | 193 mm | 280 h | 25 |
| October | 27°C | 298 mm | 287 h | 23 |
| November | 26°C | 440 mm | 228 h | 17 |
| December | 27°C | 212 mm | 261 h | 11 |
About 3,314 hours of sun a year. Roughly 280 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.