The highest day temperature in January 2025 was 84°F. The lowest night temperature was 64°F. The average values for day and night temperatures during January were 77.4°F и 70.8°F respectivly.

The average sea surface temperature in January 2025 for Kauai was 77.8°F. The maximum and minimum values were 76.2°F and 78.6°F respectively.

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

Precipitation total in January for Kauai is 1.2 in. It makes january one of the most rainy months of the year.

The average wind speed in January is 8.8 mph. This value is relatively stable throughout the year.

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 Kauai in January is 5.2 hours.