Kaunakakai weather by month & the best time to visit
United States · beach resort · tropical — wet & dry seasons climate

The best time to visit Kaunakakai is June — its sunniest month (Sunshine Score 90/100), with July and August close behind. Kaunakakai averages about 3,112 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 39 mm of rain in June.
When is the best time to visit Kaunakakai?
For sunshine, the best time to visit Kaunakakai is June, then July and August. The dullest month is March (78/100, 107 mm of rain). The full month-by-month picture is in the table below.
How sunny is Kaunakakai?
Kaunakakai is one of the sunniest places on Earth: about 3,112 hours of sunshine a year. Conditions barely change through the year — only 12 Sunshine Score points separate June from March. It ranks #75 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 797 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 | 82 | 24° / 75°F | 22° / 72°F | 83 mm | 7 | 25° / 77°F |
| February | 83 | 24° / 75°F | 21° / 70°F | 79 mm | 8 | 25° / 77°F |
| March | 78 | 24° / 75°F | 22° / 72°F | 107 mm | 9 | 24° / 75°F |
| April | 87 | 25° / 77°F | 22° / 72°F | 59 mm | 10 | 25° / 77°F |
| May | 88 | 26° / 79°F | 23° / 73°F | 52 mm | 11 | 26° / 79°F |
| June | 90 | 26° / 79°F | 24° / 75°F | 39 mm | 11 | 26° / 79°F |
| July | 90 | 27° / 81°F | 24° / 75°F | 40 mm | 12 | 27° / 81°F |
| August | 89 | 27° / 81°F | 25° / 77°F | 49 mm | 12 | 27° / 81°F |
| September | 88 | 27° / 81°F | 25° / 77°F | 51 mm | 11 | 28° / 82°F |
| October | 85 | 27° / 81°F | 24° / 75°F | 70 mm | 9 | 27° / 81°F |
| November | 82 | 26° / 79°F | 24° / 75°F | 82 mm | 7 | 26° / 79°F |
| December | 82 | 25° / 77°F | 23° / 73°F | 86 mm | 6 | 26° / 79°F |
Sea temperature in Kaunakakai by month
The sea off Kaunakakai is warmest in September at around 28°C / 82°F, and coolest in March at 24°C / 75°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
Kaunakakai: questions and answers
What kind of destination is Kaunakakai?
Kaunakakai is a beach resort in United States with a tropical — wet & dry seasons climate — the sea reaches 28°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Kaunakakai get a year?
Kaunakakai gets about 3,112 hours of sunshine a year, at its best around June.
When is the best time to visit Kaunakakai?
The sunniest time to visit Kaunakakai is June, when the Sunshine Score peaks at 90/100 (with July and August close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Kaunakakai?
March is the least sunny month in Kaunakakai, scoring 78/100 with about 107 mm of rain.
What is the sea temperature in Kaunakakai?
The sea in Kaunakakai ranges from about 24°C (March) to 28°C (September). Month-by-month sea temperatures are on this page.
How strong is the sun in Kaunakakai?
The typical midday UV index in Kaunakakai peaks around 12 (extreme) in July, easing to about 6 (high) in December. Month-by-month midday UV values are in the UV column of the table on this page.
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