Mitiaro weather by month & the best time to visit
Cook Islands · beach resort · tropical rainforest climate
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The best time to visit Mitiaro is June — its sunniest month (Sunshine Score 84/100), with July and August close behind. Mitiaro averages about 2,722 hours of sunshine a year. Daytime highs around 25°C / 77°F and roughly 62 mm of rain in June.
When is the best time to visit Mitiaro?
For sunshine, the best time to visit Mitiaro is June, then July and August. The dullest month is January (67/100, 214 mm of rain). The full month-by-month picture is in the table below.
How sunny is Mitiaro?
Mitiaro gets a lot of sun: around 2,722 hours a year. June (84/100) is noticeably better than January (67). It ranks #3 of 6 destinations in Cook Islands for annual sunshine, above the national median of 2,719 hours. The year's 1,616 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 67 | 27° / 81°F | 26° / 79°F | 214 mm | 12 | 28° / 82°F |
| February | 67 | 27° / 81°F | 27° / 81°F | 205 mm | 13 | 29° / 84°F |
| March | 67 | 27° / 81°F | 27° / 81°F | 172 mm | 11 | 29° / 84°F |
| April | 67 | 27° / 81°F | 26° / 79°F | 175 mm | 9 | 28° / 82°F |
| May | 70 | 26° / 79°F | 25° / 77°F | 137 mm | 7 | 28° / 82°F |
| June | 84 | 25° / 77°F | 24° / 75°F | 62 mm | 6 | 26° / 79°F |
| July | 83 | 25° / 77°F | 24° / 75°F | 68 mm | 7 | 26° / 79°F |
| August | 83 | 24° / 75°F | 23° / 73°F | 68 mm | 8 | 25° / 77°F |
| September | 83 | 24° / 75°F | 24° / 75°F | 64 mm | 10 | 25° / 77°F |
| October | 78 | 25° / 77°F | 24° / 75°F | 93 mm | 11 | 26° / 79°F |
| November | 68 | 26° / 79°F | 25° / 77°F | 148 mm | 11 | 26° / 79°F |
| December | 67 | 26° / 79°F | 26° / 79°F | 210 mm | 12 | 27° / 81°F |
Sea temperature in Mitiaro by month
The sea off Mitiaro is warmest in February at around 29°C / 84°F, and coolest in August at 25°C / 77°F. The water sits at a comfortable 21°C or warmer roughly all year round. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Mitiaro: questions and answers
What kind of destination is Mitiaro?
Mitiaro is a beach resort in Cook Islands with a tropical rainforest climate — the sea reaches 29°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Mitiaro get a year?
Mitiaro gets about 2,722 hours of sunshine a year, at its best around June.
When is the best time to visit Mitiaro?
The sunniest time to visit Mitiaro is June, when the Sunshine Score peaks at 84/100 (with July and August close behind). Expect daytime highs around 25°C / 77°F.
What is the least sunny month in Mitiaro?
January is the least sunny month in Mitiaro, scoring 67/100 with about 214 mm of rain.
What is the sea temperature in Mitiaro?
The sea in Mitiaro ranges from about 25°C (August) to 29°C (February). Month-by-month sea temperatures are on this page.
How strong is the sun in Mitiaro?
The typical midday UV index in Mitiaro peaks around 13 (extreme) in February, easing to about 6 (high) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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