The highest day temperature in July 2025 was 86°F. The lowest night temperature was 75°F. The average values for day and night temperatures during July were 83.2°F и 76.3°F respectivly.

The average sea surface temperature in July 2025 for Kauai was 79.0°F. The maximum and minimum values were 78.4°F and 79.8°F respectively.

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

Precipitation total in July for Kauai is 0.6 in. It makes july one of the least rainy months of the year.

The average wind speed in July is 11.7 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 July is 4.6 hours.