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

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

  • The average sea temperature in May: 77°F

The best month for swimming (with the highest average sea temperature) is September (81°F).
Coldest months (with the lowest average sea temperature) are January, February, March and April (75°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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