| Average climate data for Mount Cook, New Zealand | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 20 | 21 | 18 | 15 | 11 | 8 | 7 | 9 | 12 | 14 | 16 | 18 | 21 |
| Average minimum temperature (°C) | 9 | 9 | 7 | 4 | 2 | -1 | -2 | -1 | 1 | 4 | 5 | 7 | -2 |
| Average precipitation (mm) | 455 | 277 | 416 | 359 | 356 | 316 | 302 | 315 | 300 | 474 | 411 | 491 | 4,472 |
| Average rainfall days (days) | 12 | 11 | 13 | 12 | 13 | 14 | 13 | 14 | 14 | 17 | 14 | 16 | 163 |
| Average relative humidity (%) | 74 | 78 | 79 | 78 | 81 | 84 | 80 | 81 | 73 | 73 | 74 | 76 | 78 |
| Average daily daylight hours (h) | 15 | 13 | 12 | 10 | 9 | 9 | 9 | 10 | 11 | 13 | 14 | 15 | 12 |
| Average daily sunshine hours (h) | 6 | 6 | 4 | 4 | 3 | 2 | 2 | 3 | 4 | 4 | 5 | 5 | 4 |
The warmest month, with the highest average maximum temperature, is February (20.7 °C). The month with the lowest average maximum temperature is July (6.5 °C). Overall, the average maximum temperature over the whole year is 14 °C.
The month with the highest average minimum temperature is January (9.1 °C). The coldest month, with the lowest average minimum temperature, is July (-2.3 °C). Overall, the average minimum temperature over the whole year is 3.7 °C.
The wettest month, with the highest amount of precipitation, is December (491.5 mm). The driest month, with the least amount of precipitation, is February (276.5 mm). Over the whole year there are 4,471.8 mm of rainfall on average.
The month with the most days of rain is October (16.8 days). The month with the fewest days of rain is February (11 days). Over the whole year there are 163.4 days of rain on average.
The month with the highest average relative humidity is June (84.3 %). The month with the lowest average relative humidity is October (72.9 %). The overall average relative humidity over the whole year is 77.7 %.
The month with the longest days, so the most daylight, is December (Average daylight: 15 h). The month with the shortest days, so the least daylight, is June (Average daylight: 9 h). Over the whole year there are 11.7 h of daylight per day on average.
The month with the most sunshine per day is January (Average sunshine: 6.1 h). The month with the least sunshine per day is June (Average sunshine: 2 h). Over the whole year there are 4.1 h of sunlight per day on average.
