January Weather in Wailuku, United States

Last updated: June 24, 2025

In January, the average temperature in Wailuku, United States is a pleasant 23°C (74°F), with a minimum of 19°C (66°F) and a maximum of 28°C (83°F). You can expect about 32 mm (1.3 in) of precipitation over 5 days, coupled with a comfortable average humidity of 78%. Enjoy the mild climate while exploring all that this beautiful destination has to offer!

January Temperature in Wailuku

In January in Wailuku, the average temperature is 23°C (74°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop to as low as 19°C (66°F). This pleasant climate makes Wailuku an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

January Weather in Wailuku: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Wailuku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wailuku, January typically has an average temperature of 23°C (74°F), with highs reaching up to 28°C (83°F) and lows dropping to around 19°C (66°F).

Data source: Temperature data for Wailuku generated using information from the Copernicus Climate Change Service.

January Precipitation in Wailuku

In Wailuku in January, the precipitation amount is 32 mm (1.3 in) over the course of 5 days.

January Precipitation Trends in Wailuku

The chart displays monthly precipitation patterns in Wailuku, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Wailuku, January typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Wailuku

In Wailuku in January humidity is 78%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping embrace, making travel somewhat stifling and prompting frequent breaks to hydrate and seek shade.

January Average Humidity in Wailuku

This chart illustrates the average monthly humidity levels in Wailuku, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Wailuku is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Wailuku

In Wailuku in January, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Wailuku.

Maximum UV Index Levels in Wailuku for January

The chart shows the monthly maximum UV Index (UVI) for Wailuku in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Wailuku typically reaches 7, which falls under the high exposure category.

Data source: Wailuku January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Wailuku Compares to Other Months

Weather in Wailuku varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Wailuku, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Wailuku, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	32 mm (1.3 inches)	78%	high
February Weather	23°C (73°F)	75 mm (2.9 inches)	79%	very high
March Weather	23°C (74°F)	52 mm (2.0 inches)	79%	extreme
April Weather	24°C (75°F)	49 mm (1.9 inches)	82%	extreme
May Weather	25°C (77°F)	36 mm (1.4 inches)	83%	extreme
June Weather	26°C (79°F)	11 mm (0.4 inches)	84%	extreme
July Weather	26°C (80°F)	23 mm (0.9 inches)	85%	extreme
August Weather	27°C (80°F)	25 mm (1.0 inches)	85%	extreme
September Weather	27°C (80°F)	17 mm (0.7 inches)	84%	extreme
October Weather	26°C (79°F)	40 mm (1.6 inches)	83%	extreme
November Weather	25°C (77°F)	25 mm (1.0 inches)	82%	very high
December Weather	24°C (75°F)	45 mm (1.8 inches)	81%	very high