SeasonMapCook Islands in December
December is Cook Islands's 9th-best month (rank 9 of 12): its 3 destinations average 76/100, led by Rarotonga at 79 — 29°C and 18 rainy days — while Avarua is warmer at 32°C and scores 78.
#9 of 12 months for Cook Islands · 3 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Cook Islands in December
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Rarotonga | Island | 29°C | 192 mm · 18 days | 79 tier B | — |
| 2 | Avarua | Island | 32°C | 192 mm · 18 days | 78 tier B | — |
| 3 | Aitutaki | Island | 30°C | 248 mm · 23 days | 72 tier B | — |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means December is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Cook Islands in December
- New Zealand summer holidays · Rarotonga and 1 more place · 19 Dec – 27 Jan (usually)