January weather forecast
Kailua, HI

Weather in January

January, the same as December, is a moderately hot winter month in Kailua, Hawaii, with an average temperature varying between 71.8°F (22.1°C) and 75.2°F (24°C).

Temperature

In Kailua, the average high-temperature in January is essentially the same as in December - a still warm 75.2°F (24°C). The average low-temperature, in January, is 71.8°F (22.1°C).

Humidity

January and November, with an average relative humidity of 74%, are the least humid months in Kailua.

Rainfall

In Kailua, it is raining for 12.6 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 169.9 rainfall days, and 13.15" (334mm) of precipitation is accumulated.

Ocean temperature

In Kailua, in January, the average water temperature is 76.6°F (24.8°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 76.6°F (24.8°C).

Daylight

In Kailua, the average length of the day in January is 11h and 1min.
On the first day of January, sunrise is at 7:08 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:20 pm HST.

Sunshine

In January, the average sunshine is 8.7h.

UV index

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Kailua. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 6 in January transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in January in Kailua?

In Kailua, Hawaii, in January, the average high-temperature is 75.2°F (24°C), and the average low-temperature is 71.8°F (22.1°C).

What is the least humid month in Kailua?

January and November, with an average relative humidity of 74%, are the least humid months in Kailua, Hawaii.

What is the average humidity in January in Kailua?

In January, the average relative humidity is 74%.

How much does it rain in Kailua in January?

In Kailua, in January, it is raining for 12.6 days, with typically 1.14" (29mm) of accumulated precipitation.

What is the ocean temperature in January in Kailua?

In Kailua, Hawaii, in January, the average water temperature is 76.6°F (24.8°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.6°F (24.8°C) water may be enjoyable.

How many hours of daylight does Kailua have in January?

In January, the average day length is 11h and 1min.

When is the sunrise / sunset in January in Kailua?

On the first day of January, sunrise is at 7:08 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:20 pm HST.

How long on average sun shines in January in Kailua?

In January, the average sunshine duration in Kailua is 8.7h.

When is the lowest UV index in Kailua?

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index.

How high is the UV index in January in Kailua?

The average daily maximum UV index in January in Kailua is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Average temperature in January
Kailua, HI

Average temperature in January - Kailua, HI
  • Average high temperature in January: 75.2°F

The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).

  • Average low temperature in January: 71.8°F

The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).

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Average pressure in January
Kailua, HI

Average pressure in January - Kailua, HI
  • Average pressure in January: 30"Hg

The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in January
Kailua, HI

Average wind speed in January - Kailua, HI
  • Average wind speed in January: 10.7mph

The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).

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Average humidity in January
Kailua, HI

Average humidity in January - Kailua, HI
  • Average humidity in January: 74%

The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in January
Kailua, HI

Average rainfall in January - Kailua, HI
  • Average rainfall in January: 1.14"

The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").

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Average rainfall days in January
Kailua, HI

Average rainfall days in January - Kailua, HI
  • Average rainfall days in January: 12.6 days

The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).

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Average sea temperature in January
Kailua, HI

Average sea temperature in January - Kailua, HI
  • Average sea temperature in January: 76.6°F

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).

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Average daylight in January /
Average sunshine in January
Kailua, HI

Average daylight in January / Average sunshine in January - Kailua, HI
  • Average daylight in January: 11h and 1min

The month with the longest days is June (Average daylight: 13h and 25min).
The month with the shortest days is December (Average daylight: 10h and 52min).

  • Average sunshine in January: 8h and 42min

The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in January
Kailua, HI

Average sunshine days in January - Kailua, HI
  • Average sunshine days in January: 12.8 days

The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).

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Average UV index in January
Kailua, HI

Average UV index in January - Kailua, HI
  • Average UV index in January: 6

The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).

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Average cloud cover in January
Kailua, HI

Average cloud cover in January - Kailua, HI
  • Average cloud cover in January: 30

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).

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Average visibility in January
Kailua, HI

Average visibility in January - Kailua, HI
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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