Dunedin weather by month
Dunedin runs from about 7°C in May to 15°C in January, with October the wettest month at 242 mm.
warmest month
January
15°C
coolest month
May
7°C
wettest month
October
242 mm
worst air month
January
6 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 15°C | 79 mm | 323 h | 6 |
| February | 14°C | 70 mm | 282 h | 5 |
| March | 12°C | 84 mm | 288 h | 4 |
| April | 11°C | 65 mm | 221 h | 3 |
| May | 7°C | 43 mm | 187 h | 4 |
| June | 7°C | 87 mm | 163 h | 4 |
| July | 7°C | 101 mm | 166 h | 3 |
| August | 7°C | 45 mm | 230 h | 4 |
| September | 9°C | 93 mm | 256 h | 2 |
| October | 10°C | 242 mm | 253 h | 3 |
| November | 11°C | 63 mm | 314 h | 5 |
| December | 14°C | 156 mm | 277 h | 5 |
About 2,960 hours of sun a year. Roughly 113 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.