The highest day temperature in January 2026 was 80°F. The lowest night temperature was 66°F. The average values for day and night temperatures during January were 77.1°F и 72.1°F respectivly.

The average sea surface temperature in January 2026 for Kahului was 80.2°F. The maximum and minimum values were 79.4°F and 80.8°F respectively.

Most of the days in January are sunny but you can also expect cloudy and gloomy days.

Precipitation total in January for Kahului is 0.9 in. It makes january one of the most rainy months of the year.

The average wind speed in January is 9.9 mph. It makes January the most windless month of the year for Kahului.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Kahului in January is 8.0 hours.