Cook Islands · Month comparison
January vs May
May ranks #1 overall vs January at #10. Dry season opens — the crowd-to-value sweet spot before New Zealand winter school holidays.
January
#10 of 12 months
Worth considering
Cyclone season: 190mm of rain and genuine storm risk make January a clear avoid.
- ↑Prices measurably lower than the May–October dry season
- ↑Lush rainforest interior at its most vivid green after sustained rains
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 | January | May |
|---|---|---|
| Weather score | 3 | 8 |
| Value score | 6 | 7 |
| Crowd score | 6 | 7 |
| Events score | 5 | 5 |
| Atmosphere | 6 | 8 |
| Avg high temp | 28°C | 24°C |
| Monthly rain | 190mm | 85mm |
| Daily sunshine | 6hrs | 7hrs |
January trade-offs
- ↓Active cyclone season — storms can cancel inter-island flights to Aitutaki at short notice
- ↓190mm of rain across the month: beach days are genuinely unreliable
- ↓Lagoon visibility reduced by sediment runoff after heavy rain events
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 →