The weather in Kahurangi National Park is quite changeable and the West Coast of the South Island can be wet at any time of year, so it is advisable to prepare for wet, windy and cold conditions, particularly in the sub-alpine areas of the track. Despite the changeability, trampers and MTBers often experience warm sunny weather as the region is also one of the sunniest in New Zealand.
| Average daily high temp | Average daily low temp | Average number of rainy days | |
|---|---|---|---|
| January | 22°C | 11°C | 11 |
| February | 23°C | 11°C | 9 |
| March | 20°C | 9°C | 10 |
| April | 18°C | 7°C | 12 |
| May | 16°C | 4°C | 13 |
| June | 14°C | 2°C | 13 |
| July | 13°C | 1°C | 13 |
| August | 14°C | 3°C | 14 |
| September | 15°C | 5°C | 14 |
| October | 17°C | 6°C | 15 |
| November | 19°C | 8°C | 13 |
| December | 21°C | 10°C | 12 |
