Byron Bay weather by month
Byron Bay runs from about 15°C in July to 25°C in January, with April the wettest month at 286 mm.
warmest month
January
25°C
coolest month
July
15°C
wettest month
April
286 mm
worst air month
October
8 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 25°C | 202 mm | 298 h | 7 |
| February | 25°C | 201 mm | 298 h | 6 |
| March | 23°C | 162 mm | 296 h | 6 |
| April | 21°C | 286 mm | 296 h | 5 |
| May | 18°C | 140 mm | 293 h | 5 |
| June | 15°C | 22 mm | 265 h | 5 |
| July | 15°C | 65 mm | 270 h | 5 |
| August | 18°C | 117 mm | 276 h | 5 |
| September | 19°C | 160 mm | 306 h | 7 |
| October | 20°C | 88 mm | 357 h | 8 |
| November | 23°C | 271 mm | 303 h | 7 |
| December | 24°C | 131 mm | 366 h | 7 |
About 3,624 hours of sun a year. Roughly 185 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.