January weather forecastWailua, HI

January

Weather in January

Starting the year, January in Wailua, Hawaii, brings moderately warm temperatures combined with pleasant breezes. Noticeably, the gusts can reach up to 13.6mph (21.9km/h), offering refreshing moments for inhabitants and travelers. A variation, albeit minor, in weather conditions can be expected when compared to the upcoming month of February. Humidity and rainfall remain relatively high, creating an atmosphere perfect for the flourishing of Hawaii's lush nature. The overall climate allows visitors and locals to freely engage in various outdoor activities ranging from beach outings to exploring the island's fascinating flora and fauna.

Temperature

In the transition from December to January, Wailua reports an average high-temperature of a still moderately hot 74.7°F (23.7°C), indicating a close resemblance to the prior month. Wailua encounters a small divergence from daytime high temperatures, averaging a low-temperature of 69.6°F (20.9°C) during January nights.

Humidity

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

Rainfall

In Wailua, in January, during 12.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Ocean temperature

In Wailua, the average seawater temperature in January is 76.5°F (24.7°C).
Note: For those not fond of cold temperatures, taking a swim at 76.5°F (24.7°C) may require consideration of the sunshine, wind, and ambient temperature. While wetsuits are not mandatory, they can enhance the experience.

Daylight

The average length of the day in January is 10h and 58min.
On the first day of the month, sunrise is at 7:16 am and sunset at 6:05 pm. On the last day of January, sunrise is at 7:15 am and sunset at 6:25 pm HST.

Sunshine

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

UV index

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Wailua. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily high UV index of 6 in January leads to these guidelines:
Take precautions against overexposure. Protection against sun damage is needed. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Boost your sun resistance with garments that are densely woven yet spacious. Warning! The Sun's UV rays intensify with reflections from sand and water.

Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

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

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

The average relative humidity in January is 75%.

In Wailua, during January, the rain falls for 12.5 days and regularly aggregates up to 1.57" (40mm) of precipitation.

In Wailua, the average seawater temperature in January is 76.5°F (24.7°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.5°F (24.7°C) water.

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

On the first day of January, sunrise is at 7:16 am and sunset at 6:05 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 6:25 pm HST.

The average sunshine duration in January is 8.1h.

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

In January, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Dec

January

Feb

Average high temperature

75.4°F

74.7°F

73.2°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.7mph

10.4mph

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
Wailua, 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).

Average pressure in January
Wailua, 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).

Average wind speed in January
Wailua, 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).

Average humidity in January
Wailua, 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
Wailua, 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").

Average rainfall days in January
Wailua, 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
Wailua, HI

Average sea temperature in January: 76.3°F

The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (74.8°F).

Average daylight in January /
Average sunshine in January
Wailua, 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 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).

Average sunshine days in January
Wailua, 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
Wailua, 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
Wailua, 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
Wailua, 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).