Kailua
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Kailua, HI

January, like December, is an agreeable winter month in Kailua, Hawaii, with average temperature ranging between min 53.6°F (12°C) and max 68°F (20°C). The coldest months are January through April, with an average high-temperature of 68°F (20°C). Weather in January »
February, the last month of the winter, in Kailua, is also an agreeable month, with temperature in the range of an average high of 68°F (20°C) and an average low of 51.8°F (11°C). January through April, with an average high-temperature of 68°F (20°C), are the coldest months. Weather in February »

March, the first month of the spring, in Kailua, is also an agreeable month, with average temperature ranging between min 53.6°F (12°C) and max 68°F (20°C). January through April, with an average high-temperature of 68°F (20°C), are the coldest months. Weather in March »

April, like March, is an agreeable spring month in Kailua, Hawaii, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 68°F (20°C). The coldest months are January through April, with an average high-temperature of 68°F (20°C). Weather in April »

May, the last month of the spring, in Kailua, is another pleasant month, with average temperature fluctuating between 69.8°F (21°C) and 55.4°F (13°C). In May, the average high-temperature is practically the same as in April - a still pleasant 69.8°F (21°C). Weather in May »

The first month of the summer, June, is still a pleasant month in Kailua, Hawaii, with average temperature varying between 57.2°F (14°C) and 71.6°F (22°C). In June, the average high-temperature is almost the same as in May - a still pleasant 71.6°F (22°C). Weather in June »

July is a warm summer month in Kailua, Hawaii, with average temperature ranging between max 73.4°F (23°C) and min 59°F (15°C). The warmest months are July through September, with an average high-temperature of 73.4°F (23°C). Weather in July »

August, the last month of the summer, in Kailua, is another warm month, with average temperature fluctuating between 59°F (15°C) and 73.4°F (23°C). July through September, with an average high-temperature of 73.4°F (23°C), are the warmest months. Weather in August »

September, the first month of the autumn, in Kailua, is also a moderately hot month, with temperature in the range of an average low of 59°F (15°C) and an average high of 73.4°F (23°C). The warmest months are July through September, with an average high-temperature of 73.4°F (23°C). Weather in September »

October, like September, is an agreeable autumn month in Kailua, Hawaii, with temperature in the range of an average high of 71.6°F (22°C) and an average low of 57.2°F (14°C). In October, the average high-temperature is practically the same as in September - an agreeable 71.6°F (22°C). Weather in October »

November, the last month of the autumn, in Kailua, is another pleasant month, with average temperature ranging between min 57.2°F (14°C) and max 69.8°F (21°C). In November, the average high-temperature is practically the same as in October - a still agreeable 69.8°F (21°C). Weather in November »

The first month of the winter, December, is also an agreeable month in Kailua, Hawaii, with average temperature fluctuating between 69.8°F (21°C) and 53.6°F (12°C). In Kailua, Hawaii, the average high-temperature in December remains equal as in November - a still agreeable 69.8°F (21°C). Weather in December »

What are the coldest months in Kailua?

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

How many days does it rain in Kailua?

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

What is the month with the least sunshine in Kailua?

January and February, with an average of 13h of sunshine, are months with the least sunshine in Kailua.

What month is the ocean coldest in Kailua?

With an average ocean temperature of 75.7°F (24.3°C), March is the month with the coldest seawater in Kailua. A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 75.7°F (24.3°C) water.

When is the highest UV index in Kailua?

Months with the highest UV index in Kailua are March through September, with an average maximum UV index of 12.

What is the rainiest month in Kailua?

The month with the most rainfall in Kailua is April when the rain falls for 16 days and typically aggregates up to 8.1" (207mm) of precipitation.

What is the driest month in Kailua?

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

When are the longest days in Kailua?

The month with the longest days in Kailua is June, with an average of 13.4h of daylight.

What are the warmest months in Kailua?

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

What are the months with the most sunshine in Kailua?

July and August, with an average of 17h of sunshine, are months with the most sunshine.

What month is the ocean warmest in Kailua?

The month with the warmest seawater is September, with an average ocean temperature of 80.4°F (26.9°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Kailua?

The month with the shortest days is December, with an average of 10.8h of daylight.

What is the month with the lowest UV index in Kailua?

December is the month with the lowest UV index in Kailua, with an average maximum UV index of 7.
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).