January Weather in Waipahu, United States

Last updated: June 24, 2025

In January, the average temperature in Waipahu, United States hovers around 23°C (73°F), with minimums dipping to 17°C (63°F) and maximums reaching 28°C (82°F). You can expect about 22 mm (0.9 in) of precipitation over 6 days, accompanied by a relatively high average humidity of 78%. Perfect weather for exploring or relaxing!

January Temperature in Waipahu

In January in Waipahu, the average temperature is 23°C (73°F). Maximum can reach 28°C (82°F) and minimum can be as low as 17°C (63°F). This mild climate makes it an ideal destination for outdoor activities and sightseeing.

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

The chart illustrates January temperature patterns in Waipahu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waipahu, January typically has an average temperature of 23°C (73°F), with highs reaching up to 28°C (82°F) and lows dropping to around 17°C (63°F).

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

January Precipitation in Waipahu

In Waipahu in January, the precipitation amount is 22 mm (0.9 in) over a span of 6 days.

January Precipitation Trends in Waipahu

The chart displays monthly precipitation patterns in Waipahu, 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 Waipahu, January typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 6 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 Waipahu

In Waipahu in January, humidity is 78%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities a little challenging but still enjoyable for travelers who appreciate a tropical atmosphere.

January Average Humidity in Waipahu

This chart illustrates the average monthly humidity levels in Waipahu, 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 Waipahu 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 Waipahu

In Waipahu in January, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Waipahu.

Maximum UV Index Levels in Waipahu for January

The chart shows the monthly maximum UV Index (UVI) for Waipahu 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 Waipahu typically reaches 8, which falls under the very high exposure category.

Data source: Waipahu 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 Waipahu Compares to Other Months

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

This table compares monthly weather conditions in Waipahu, 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 (73°F)	22 mm (0.9 inches)	78%	very high
February Weather	22°C (72°F)	76 mm (3.0 inches)	79%	very high
March Weather	22°C (73°F)	77 mm (3.0 inches)	78%	extreme
April Weather	23°C (74°F)	39 mm (1.5 inches)	81%	extreme
May Weather	24°C (76°F)	38 mm (1.5 inches)	82%	extreme
June Weather	25°C (78°F)	51 mm (2.0 inches)	82%	extreme
July Weather	26°C (79°F)	28 mm (1.1 inches)	83%	extreme
August Weather	26°C (80°F)	27 mm (1.0 inches)	83%	extreme
September Weather	26°C (80°F)	26 mm (1.0 inches)	82%	extreme
October Weather	26°C (78°F)	57 mm (2.2 inches)	81%	extreme
November Weather	24°C (76°F)	32 mm (1.3 inches)	80%	very high
December Weather	23°C (74°F)	79 mm (3.1 inches)	79%	high