Monthly weather forecast and climate
Kailua, HI

What are the coldest months in Kailua?

Coldest months are January through April, with an average high-temperature of 68°F (20°C).

How much does it rain in Kailua?

Throughout the year, in Kailua, Hawaii, there are 182 rainfall days, and 66" (1676mm) of precipitation is accumulated.

What is the rainiest month in Kailua?

April is the month with the most rainfall. Rain falls for 16 days and accumulates 8.1" (207mm) of precipitation.

What is the driest month in Kailua?

June is the month with the least rainfall in Kailua. Rain falls for 15 days and accumulates 4" (102mm) of precipitation.

What is the warmest month in Kailua?

Warmest months in Kailua, Hawaii, are July through September, with an average high-temperature of 73.4°F (23°C).
Average temperature - Kailua, HI
Average rainfall - Kailua, HI
Average rainfall days - Kailua, HI

Months with the highest number of rainy days are July and August (17 days).
Months with the lowest number of rainy days are January and February (13 days).

Average sea temperature - Kailua, HI

The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

Average daylight / Average sunshine - Kailua, HI

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.8h).

Months with most sunshine are July and August (Average sunshine: 17h).
Months with least sunshine are January and February (Average sunshine: 13).

Average UV index - Kailua, HI

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).

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