Sydney weather by month
Sydney runs from about 12°C in June to 23°C in January, with April the wettest month at 160 mm.
warmest month
January
23°C
coolest month
June
12°C
wettest month
April
160 mm
worst air month
April
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 23°C | 118 mm | 329 h | 10 |
| February | 23°C | 82 mm | 255 h | 11 |
| March | 21°C | 59 mm | 321 h | 9 |
| April | 18°C | 160 mm | 275 h | 12 |
| May | 15°C | 160 mm | 244 h | 10 |
| June | 12°C | 140 mm | 213 h | 12 |
| July | 12°C | 38 mm | 276 h | 8 |
| August | 14°C | 36 mm | 262 h | 8 |
| September | 16°C | 60 mm | 298 h | 10 |
| October | 17°C | 41 mm | 312 h | 9 |
| November | 21°C | 121 mm | 277 h | 9 |
| December | 23°C | 53 mm | 380 h | 11 |
About 3,442 hours of sun a year. Roughly 107 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.