WEATHER · CLIMATE NORMALS · 1991–2020
Auckland Climate — Averages by Month
What the weather in Auckland, NZaverages across a standard 30-year period. Each month's figure is the 1991–2020 mean temperature and total rainfall from the ERA5 reanalysis — the long-run normal a place settles around, not a forecast for any particular day.
Month-by-month normals
| Month | Avg temperature | Avg rainfall |
|---|---|---|
| January | 19.6 °C | 74.7 mm |
| February | 20.1 °C · warmest | 72.9 mm |
| March | 18.9 °C | 75.5 mm |
| April | 16.9 °C | 83.1 mm |
| May | 14.9 °C | 103.7 mm |
| June | 12.9 °C | 105.6 mm |
| July | 12.0 °C · coldest | 120.4 mm · wettest |
| August | 12.1 °C | 112.0 mm |
| September | 13.2 °C | 100.5 mm |
| October | 14.5 °C | 83.5 mm |
| November | 16.0 °C | 81.3 mm |
| December | 18.1 °C | 99.1 mm |
How to read these numbers
These are reanalysis normals, not readings from a single weather station. They come from the ERA5 0.25° (~25 km) global reanalysis grid, sampled at the grid cell nearest Auckland — centred at 36.75°S, 174.75°E. A reanalysis blends observations with a physics model onto an even grid, so a coastal or mountain city's cell can read a little cooler, warmer, wetter or drier than the city centre itself. The month-to-month shape — when it's hot, when it rains — is what these normals capture best.
“Normal” means the 1991–2020 average, the current World Meteorological Organization standard period. A normal is what a place tends toward over decades — any single day, month or year can and will depart from it.