January weather - Winter 2025

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average sea temperature in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

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

Weather in January

The first month of the year in Hanalei, Hawaii, opens with stable and mild weather conditions. It follows closely on the heels of December, offering relatively similar weather features. A bit more sunlight could be enjoyed during the day with an average of 11 hours of daylight. Noticeably, the levels of humidity stand at 75% and temperature ranges move from 20.9°C (69.6°F) to 23.7°C (74.7°F). It makes January an agreeable month, acting as an inviting prelude to the wetter February.

Temperature

Entering January, the average high-temperature is recorded at a still moderately hot 23.7°C (74.7°F), exhibiting a minimal shift from December's 24.1°C (75.4°F). January nights witness a slight temperature decrease, averaging at a pleasant 20.9°C (69.6°F).

Humidity

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

Rainfall

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

Ocean temperature

The months with the coldest seawater are January through April, with an average ocean temperature of 24°C (75.2°F).
Note: Factor in your tolerance to cold, the sunshine, the wind, and the air's warmth, and a swim in 24°C (75.2°F) might be tempting. It is interesting to note that Olympians compete in 25°C (77°F) to 28°C (82.4°F) water temperatures.

Daylight

In Hanalei, the average length of the day in January 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 January, the average sunshine is 8.1h.

UV index

The months with the lowest UV index in Hanalei are January through August, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 6 in January leads to these guidelines:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.

Updated: Jul 25, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are January temperatures?

The high-temperature during January is 23.7°C (74.7°F) and the low-temperature is 20.9°C (69.6°F).

What is the least humid month?

The least humid month is January, with an average relative humidity of 75%.

What is the average humidity in January?

In January, the average relative humidity is 75%.

How much does it rain in Hanalei in January?

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

What are the months with the coldest ocean?

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

What is the water temperature in January?

In January, the average ocean temperature is 24°C (75.2°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24°C (75.2°F) water may be enjoyable.

What is the average length of the day in January?

The average day length in January in Hanalei is 10h and 58min.

When is the sunrise / sunset in January?

On the first day of January in Hanalei, 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?

The average sunshine duration in January is 8.1h.

What is the month with the lowest UV index?

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

What is the UV index reading in January?

In Hanalei, the average daily maximum UV index in January is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

24.1°C 75.4°F

23.7°C 74.7°F

22.9°C 73.2°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

18.9km/h 11.7mph

16.8km/h 10.4mph

18.5km/h 11.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

18.1

12.5

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

6.7

12.8

7.8

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Hanalei, HI

Average high temperature in January: 23.7°C

The warmest month (with the highest average high temperature) is September (26.5°C).
The months with the lowest average high temperature are February and March (22.9°C).

Average low temperature in January: 20.9°C

The month with the highest average low temperature is September (24.4°C).
The coldest month (with the lowest average low temperature) is February (20.3°C).

Average pressure in January
Hanalei, HI

Average pressure in January: 1016.1mbar

The month with the highest atmospheric pressure is April (1018.2mbar).
The month with the lowest atmospheric pressure is October (1015.2mbar).

Average wind speed in January
Hanalei, HI

Average wind speed in January: 16.1km/h

The windiest month (with the highest average wind speed) is July (19.8km/h).
The calmest month (with the lowest average wind speed) is January (16.1km/h).

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%).

Average rainfall in January
Hanalei, HI

Average rainfall in January: 40mm

The wettest month (with the highest rainfall) is March (64mm).
The driest month (with the least rainfall) is April (33mm).

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).

Average sea temperature in January
Hanalei, HI

Average sea temperature in January: 24°C

The best months for swimming (with the highest average sea temperature) are September and October (27°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (24°C).

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

Average daylight in January: 11h and 0min

The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).

Average sunshine in January: 8h and 1min

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).

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).

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).

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).

Average visibility in January
Hanalei, HI

Average visibility in January: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

January weather forecast
Hanalei, HI

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