January weather forecast
Hanalei, HI

The vast Taro farm fields in the valley of Hanalei, Hawaii, with beautiful cloudy skies and mountains
The vast Taro farm fields in the valley of Hanalei, Hawaii, with beautiful cloudy skies and mountains

Weather in January

January, like December, in Hanalei, Hawaii, is a moderately hot winter month, with an average temperature fluctuating between 74.7°F (23.7°C) and 69.6°F (20.9°C).

Temperature

In January, the average high-temperature is almost the same as in December - a still moderately hot 74.7°F (23.7°C). In January, in Hanalei, the average low-temperature is 69.6°F (20.9°C).

Humidity

With an average relative humidity of 75%, January is the least humid month in Hanalei.

Rainfall

In January, the rain falls for 12.5 days. Throughout January, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Ocean temperature

January through April, with an average ocean temperature of 75.2°F (24°C), are months with the coldest seawater.
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.2°F (24°C) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).)

Daylight

The average length of the day in January in Hanalei is 10h and 58min.
On the first day of the month, sunrise is at 7:17 am and sunset at 6:05 pm. On the last day of January, sunrise is at 7:16 am and sunset at 6:26 pm HST.

Sunshine

In Hanalei, Hawaii, the average sunshine in January is 8.1h.

UV index

The months with the lowest UV index in Hanalei, Hawaii, are January through August, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in January interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in January in Hanalei?

In January, in Hanalei, Hawaii, the average high-temperature is 74.7°F (23.7°C), and the average low-temperature is 69.6°F (20.9°C).

What is the least humid month in Hanalei?

With an average relative humidity of 75%, January is the least humid month in Hanalei.

What is the average humidity in January in Hanalei?

In Hanalei, the average relative humidity in January is 75%.

How much does it rain in Hanalei in January?

In January, in Hanalei, Hawaii, the rain falls for 12.5 days. Throughout January, 1.57" (40mm) of precipitation is accumulated.

What are the months with the coldest ocean in Hanalei?

The months with the coldest seawater in Hanalei, Hawaii, are January through April, with an average ocean temperature of 75.2°F (24°C).

What is the water temperature in January in Hanalei?

In Hanalei, in January, the average water temperature is 75.2°F (24°C). 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 75.2°F (24°C).

How many hours of daylight does Hanalei have in January?

In Hanalei, Hawaii, the average day length in January is 10h and 58min.

What time are sunrise and sunset in January in Hanalei?

On the first day of January in Hanalei, Hawaii, sunrise is at 7:17 am and sunset at 6:05 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:26 pm HST.

How long on average sun shines in January in Hanalei?

In Hanalei, Hawaii, the average sunshine duration in January is 8.1h.

When is the lowest UV index in Hanalei?

The months with the lowest UV index in Hanalei, Hawaii, are January through August, October through December, with an average maximum UV index of 6.

What is the UV index intensity in January in Hanalei?

In January, the average daily maximum UV index in Hanalei is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.

Average temperature in January
Hanalei, HI

Average temperature in January - Hanalei, HI
  • Average high temperature in January: 74.7°F

The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).

  • Average low temperature in January: 69.6°F

The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).

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Average pressure in January
Hanalei, HI

Average pressure in January - Hanalei, HI
  • Average pressure in January: 30.01"Hg

The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).

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Average wind speed in January
Hanalei, HI

Average wind speed in January - Hanalei, HI
  • Average wind speed in January: 10mph

The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).

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Average humidity in January
Hanalei, HI

Average humidity in January - Hanalei, HI
  • Average humidity in January: 75%

The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).

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Average rainfall in January
Hanalei, HI

Average rainfall in January - Hanalei, HI
  • Average rainfall in January: 1.57"

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

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Average rainfall days in January
Hanalei, HI

Average rainfall days in January - Hanalei, HI
  • Average rainfall days in January: 12.5 days

The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).

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Average sea temperature in January
Hanalei, HI

Average sea temperature in January - Hanalei, HI
  • Average sea temperature in January: 75°F

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

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

Average daylight in January / Average sunshine in January - Hanalei, HI
  • Average daylight in January: 10h and 58min

The month with the longest days is June (Average daylight: 13h and 28min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in January: 8h and 6min

The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).

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Average sunshine days in January
Hanalei, HI

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

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

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Average UV index in January
Hanalei, HI

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

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

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Average cloud cover in January
Hanalei, HI

Average cloud cover in January - Hanalei, HI
  • Average cloud cover in January: 38

The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).

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Average visibility in January
Hanalei, HI

Average visibility in January - Hanalei, 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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