Wanaka weather by month
Wanaka runs from about 5°C in July to 17°C in January, with September the wettest month at 312 mm.
warmest month
January
17°C
coolest month
July
5°C
wettest month
September
312 mm
worst air month
January
3 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 17°C | 133 mm | 333 h | 3 |
| February | 16°C | 48 mm | 351 h | 3 |
| March | 13°C | 119 mm | 327 h | 2 |
| April | 12°C | 181 mm | 233 h | 1 |
| May | 7°C | 31 mm | 203 h | 1 |
| June | 6°C | 68 mm | 131 h | 1 |
| July | 5°C | 109 mm | 174 h | 2 |
| August | 6°C | 117 mm | 215 h | 2 |
| September | 7°C | 312 mm | 246 h | 1 |
| October | 10°C | 218 mm | 285 h | 2 |
| November | 13°C | 137 mm | 356 h | 3 |
| December | 16°C | 153 mm | 350 h | 3 |
About 3,204 hours of sun a year. Roughly 162 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.