Kaanapali
Hawaii, USA
Long-term weather forecast
Long-term weather forecast
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May weather forecast and Climate
Kaanapali, HI

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Palm trees on green grass overlooking the famous Kaanapali beach in Hawaii, with clear waters under the partially cloudy skies
Palm trees on green grass overlooking the famous Kaanapali beach in Hawaii, with clear waters under the partially cloudy skies
May is the beginning of the dry season as abundant sunshine spreads over the coastal areas. The warm waters lack strong currents, which makes them perfect for snorkeling. The leeward slopes of the mountains and nearby lowlands receive less rainfall, which becomes almost negligible by May.
The temperatures are in the 65°F (18.3°C) to 84°F (28.9°C) range. Nights turn cooler as the skies are mostly clear.
The dry May weather is perfect to watch the last of the whales return by the end of the month to the northern ocean. Prepare for the invasion of the beaches by the summer crowds.
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  • The average high temperature in May: 81°F

Warmest months (with the highest average high temperature) are July, August, September and October (82°F).
Months with the lowest average high temperature are January, February and March (77°F).

  • The average low temperature in May: 64°F

The month with the highest average low temperature is August (68°F).
Coldest months (with the lowest average low temperature) are January, February and March (61°F).

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  • The average rainfall in May: 3.3"

The wettest month (with the highest rainfall) is January (7.4").
The driest month (with the lowest rainfall) is June (1.9").

  • The average rainfall days in May: 8 days

Months with the highest number of rainy days are March and December (12 days).
Months with the lowest number of rainy days are June, August and September (7 days).

  • The average sea temperature in May: 77.6°F

The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (76°F).

  • The average daylight in May: 13h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • The average sunshine in May: 9h

Months with most sunshine are May, June, July, August and September (Average sunshine: 9h).
Months with least sunshine are January, February, November and December (Average sunshine: 7).

  • The average UV index in May: 11

Months with the highest UV index are June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).

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