Kahului weather by month & the best time to visit
United States · beach resort · semi-arid climate
The best time to visit Kahului is June — its sunniest month (Sunshine Score 93/100), with July and May close behind. Kahului averages about 3,218 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 28 mm of rain in June.
When is the best time to visit Kahului?
For sunshine, the best time to visit Kahului is June, then July and May. The dullest month is March (83/100, 83 mm of rain). The full month-by-month picture is in the table below.
How sunny is Kahului?
Kahului is one of the sunniest places on Earth: about 3,218 hours of sunshine a year. Conditions barely change through the year — only 10 Sunshine Score points separate June from March. It ranks #58 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 620 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 | 87 | 24° / 75°F | 23° / 73°F | 61 mm | 7 | 25° / 77°F |
| February | 87 | 24° / 75°F | 22° / 72°F | 63 mm | 8 | 25° / 77°F |
| March | 83 | 24° / 75°F | 22° / 72°F | 83 mm | 9 | 24° / 75°F |
| April | 90 | 24° / 75°F | 23° / 73°F | 47 mm | 10 | 25° / 77°F |
| May | 91 | 25° / 77°F | 23° / 73°F | 37 mm | 10 | 25° / 77°F |
| June | 93 | 26° / 79°F | 24° / 75°F | 28 mm | 11 | 26° / 79°F |
| July | 92 | 26° / 79°F | 25° / 77°F | 32 mm | 11 | 26° / 79°F |
| August | 91 | 27° / 81°F | 25° / 77°F | 40 mm | 12 | 27° / 81°F |
| September | 91 | 27° / 81°F | 25° / 77°F | 38 mm | 11 | 27° / 81°F |
| October | 88 | 27° / 81°F | 25° / 77°F | 55 mm | 9 | 26° / 79°F |
| November | 86 | 26° / 79°F | 24° / 75°F | 65 mm | 7 | 26° / 79°F |
| December | 85 | 25° / 77°F | 23° / 73°F | 71 mm | 6 | 26° / 79°F |
Sea temperature in Kahului by month
The sea off Kahului is warmest in August at around 27°C / 81°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
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Head-to-head
How Kahului compares month by month: Kahului vs Honolulu · Kahului vs Lihue, Kauai · Kahului vs Kailua-Kona · Kahului vs Hilo · all comparisons
Kahului: questions and answers
What kind of destination is Kahului?
Kahului is a beach resort in United States with a semi-arid climate — the sea reaches 27°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Kahului get a year?
Kahului gets about 3,218 hours of sunshine a year, at its best around June.
When is the best time to visit Kahului?
The sunniest time to visit Kahului is June, when the Sunshine Score peaks at 93/100 (with July and May close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Kahului?
March is the least sunny month in Kahului, scoring 83/100 with about 83 mm of rain.
What is the sea temperature in Kahului?
The sea in Kahului ranges from about 24°C (March) to 27°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Kahului?
The typical midday UV index in Kahului peaks around 12 (extreme) in August, 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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