Weather in Rarotonga in September

Rarotonga, Cook Islands averages a high of 23.3°C (73.9°F) and low of 22.1°C (71.8°F) in September, with 8 rain days and 9.9 hours of daily sunshine. Travel score: 78.9/100 (Good). The best time to visit Rarotonga is August.

High
23°C74°F
Low
22°C72°F
🌧️
8
rain days
☀️
9.9
hrs/day sunshine
💧
76%
humidity
79— Good

September in Rarotonga is warm and occasionally wet — good for most activities.

JanFebMarAprMayJunJulAugSepOctNovDec

What are the average temperatures in Rarotonga?

JanFebMarAprMayJunJulAugSep23°22°OctNovDec

How much does it rain in Rarotonga in September?

Rarotonga receives an average of 68.2mm of rainfall across 8 rainy days in September. The annual total is 1560.7mm.

JanFebMarAprMayJunJulAugSep8dOctNovDec

What should I pack for Rarotonga in September?

Essentials

👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 23°C
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun

Traveling to Cook Islands in September?

Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.

View Cook Islands Holidays 2026Long Weekends Calendar

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How can I plan my trip to Rarotonga?

Best Time to Visit Cook Islands

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Where Is Hot in September?

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What is the weather like in other months in Rarotonga?

January
26°
18 rain days
67
February
27°
17 rain days
68
March
27°
18 rain days
67
April
26°
15 rain days
71
May
25°
13 rain days
72
June
24°
8 rain days
79
July
24°
9 rain days
77
August
23°
8 rain days
79
October
24°
9 rain days
79
November
25°
10 rain days
77
December
26°
15 rain days
70

Data based on 1994–2024 averages · Last updated: 2024-12-31