Cook Islands · Month comparison
August vs May
May ranks #1 overall vs August at #5. Dry season opens — the crowd-to-value sweet spot before New Zealand winter school holidays.
August
#5 of 12 months
Best match
Driest month of the year at 65mm — and the lowest humidity at 70%.
- ↑Driest and sunniest month of the year — almost no rain across all of August
- ↑Humidity at 70% is the annual low: the most comfortable conditions of the year
May
#1 of 12 months
Best match
Dry season opens — the crowd-to-value sweet spot before New Zealand winter school holidays.
- ↑85mm of rain is genuinely manageable — most days are dry and clear
- ↑Prices still below the June–August premium before school holidays hit
| Factor | August | May |
|---|---|---|
| Weather score | 9 | 8 |
| Value score | 5 | 7 |
| Crowd score | 5 | 7 |
| Events score | 5 | 5 |
| Atmosphere | 9 | 8 |
| Avg high temp | 22°C | 24°C |
| Monthly rain | 65mm | 85mm |
| Daily sunshine | 8hrs | 7hrs |
August trade-offs
- ↓School holiday crowds remain from July — Aitutaki still heavily booked
- ↓Accommodation prices hold at peak-season levels throughout August
- ↓Coolest temperatures of the year — not a warmth-seeker's month
May trade-offs
- ↓Evenings noticeably cooler than summer — pack a layer for open-air dinners
- ↓Some activities (lagoon cruises, sailing) operate reduced schedules before the main season
- ↓Less vibrant green in the interior as dry season bites
Scores compare months within Cook Islands. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →