May weather forecast and climate
Hana, HI US

• Average high temperature in May: 26.7°C

Warmest months (with the highest average high temperature) are August and September (28.3°C).
Months with the lowest average high temperature are January, February and March (25.6°C).

• Average low temperature in May: 20°C

The month with the highest average low temperature is August (22.2°C).
The coldest month (with the lowest average low temperature) is February (17.8°C).

• Average rainfall in May: 148.8mm

The wettest month (with the highest rainfall) is March (241.8mm).
The driest month (with the lowest rainfall) is June (103.6mm).

• Average rainfall days in May: 14 days

Months with the highest number of rainy days are April, July and August (16 days).
Months with the lowest number of rainy days are January and February (12 days).

• Average sea temperature in May: 25.2°C

The best month for swimming (with the highest average sea temperature) is September (26.7°C).
The coldest month (with the lowest average sea temperature) is March (24.3°C).

• Average daylight in May: 13.1h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

• Average sunshine in May: 7h

Months with most sunshine are June, July, August and September (Average sunshine: 8h).
Months with least sunshine are November and December (Average sunshine: 6).

• 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).