Kauai Weather by Month — Temperature & Rainfall Guide

Kauai is a region in the United States of America. Many people wonder what the weather conditions are in Kauai over the year. What is the best time to visit Kauai?

This page shows the average weather conditions by month in Kauai over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 24°C (75°F) and nighttime temperatures around 21°C (70°F).

Find more detailed climate information for Kauai in January here.

In February the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 24°C (75°F) and nighttime temperatures around 20°C (68°F). On average, this month is the coldest month of the year in Kauai.

Find more detailed climate information for Kauai in February here.

In March the weather in Kauai ranges from pleasant in Kapaa to perfect in Princeville. In Princeville you can expect warm maximum average daytime temperatures around 24°C (75°F) and nighttime temperatures around 20°C (68°F).

Find more detailed climate information for Kauai in March here.

In April the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 25°C (77°F) and nighttime temperatures around 21°C (70°F).

Find more detailed climate information for Kauai in April here.

In May the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 26°C (79°F) and nighttime temperatures around 22°C (72°F).

Find more detailed climate information for Kauai in May here.

In June the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 27°C (81°F) and nighttime temperatures around 23°C (73°F).

Find more detailed climate information for Kauai in June here.

In July the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 27°C (81°F) and nighttime temperatures around 23°C (73°F).

Find more detailed climate information for Kauai in July here.

In August the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 28°C (82°F) and nighttime temperatures around 24°C (75°F).

Find more detailed climate information for Kauai in August here.

In September the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 28°C (82°F) and nighttime temperatures around 24°C (75°F). On average, this month is one of the warmest months of the year in Kauai. So be prepared and make sure to dress lightly.

Find more detailed climate information for Kauai in September here.

In October the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 27°C (81°F) and nighttime temperatures around 24°C (75°F).

Find more detailed climate information for Kauai in October here.

In November the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 26°C (79°F) and nighttime temperatures around 23°C (73°F).

Find more detailed climate information for Kauai in November here.

In December the weather in Kauai is generally perfect. In Princeville you can expect warm maximum average daytime temperatures around 25°C (77°F) and nighttime temperatures around 22°C (72°F).

Find more detailed climate information for Kauai in December here.