Rarotonga Temperature by Month
Rarotonga in Aitutaki, Cook Islands enjoys a stable climate, with daytime temperatures staying close to 26°C (79°F) throughout the year. Explore the full monthly breakdown below.
Rarotonga Monthly Temperatures
The temperature in Rarotonga remains steady throughout the year, providing a consistently comfortable climate. Maximum daytime temperatures range from a comfortable 28°C (82°F) in March to a comfortable 25°C (77°F) in August. Nights are mild year-round, with lows ranging from 26°C (79°F) in March to 22°C (72°F) in August.
The chart below illustrates the average maximum day and minimum night temperatures in Rarotonga by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. March, the warmest month, gets 179 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Rarotonga Temperatures: 1976-2026
Browse day-by-day temperature records for Rarotonga spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Rarotonga vs the Cook Islands
The map below shows the annual temperature across the Cook Islands. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
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very cold
Rarotonga vs World: Temperature Compared
Rarotonga's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Rarotonga?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Rarotonga, August is the coolest month, with average highs of 25°C (77°F) and humidity around 83% — considered very high. In March, the warmest month, temperatures average 28°C (82°F) with 90% humidity — conditions that feel very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Rarotonga's weather — including monthly rainfall, sunshine hours, and humidity — visit our Rarotonga climate page.
