Cook Islands
Rarotonga in January: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Rarotonga in January is climatically well suited to beach holidays and family holidays. The average daily high is around 27 °C, and the sea is about 27 °C. With about 19 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
68/100 · #10
Warmth
#3
Dryness
#10
Sun
#2
Sea warmth
#4
Published best categories: none
Rarotonga · JanuaryPhoto: Archives New Zealand from New Zealand · CC BY-SA 2.0Climate facts
- Average high
- 27 °C
- Average low
- 26 °C
- Sea
- 27 °C
- Rainy days (est.)
- 19 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| December | 26 | 25 | 18 | 164 | 7.9 | 81 | 5.4 | 26 | 71 |
| January (selected) | 27 | 26 | 19 | 192 | 7.9 | 82 | 5.2 | 27 | 68 |
| February | 27 | 26 | 19 | 190 | 7.6 | 81 | 5.1 | 28 | 66 |
How do the previous and next months compare?
Baseline: January (68/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| December | +3 | -0.7 °C | -0.7 °C | -1.4 | -28.6 mm | ±0 h | -0.5 % | +0.2 m/s | -0.7 °C |
| February | -2 | +0.4 °C | +0.5 °C | +0.4 | -2.5 mm | -0.3 h | -0.8 % | ±0 m/s | +0.4 °C |
All twelve months in context
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Where to stay in Rarotonga
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Useful next decisions
Frequently asked questions
How warm is Rarotonga in January?
The average daily high is around 27 °C, with an average daily low of about 26 °C.
Can you swim in Rarotonga in January?
The sea is about 27 °C (very warm).
Does it rain a lot in Rarotonga in January?
The curated estimate is about 19 rainy days per month, not a directly measured long-term average. Total precipitation averages around 192 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Rarotonga?
By the climate score, June, July, August and September are the strongest months for Rarotonga. For a beach trip: June, September, October and November. January is not among them.