Kauai Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Kauai, the United States of America in September.

Thinking about venturing to Kauai, the United States of America this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Kauai in September

Kauai, the United States of America is a region in the United States of America. September in Kauai generally has warm temperatures, with moderate precipitation.

Temperatures

You can expect warm maximum daytime temperatures of around 28°C (82°F) and nighttime temperatures around 24°C (75°F) in Princeville. On average, September is the warmest month of the year in Kauai, the United States of America. So be prepared and pack summer clothes.

To explore the conditions in Kauai, the United States of America in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Koloa with an average of 46 mm (1.8 in) to moderate rainfall in Kapaa with 65 mm (2.6 in). Based on our climate data it is the driest month of the year in Princeville.

Average sunshine

Most destinations offer generous amounts of sunshine this September. For example, Princeville gets approximately 242 hours of sunlight, perfect for anyone wanting bright, sunny days.

Explore Kauai by month

Pick a month to see the average temperature, rainfall and sunshine in Kauai — and find the best time to visit. (based on Princeville)

Best Places to Visit in Kauai in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Kauai.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Kauai

What is the weather like in September for some of the most popular destinations in Kauai, the United States of America?

Temperature range in Kauai (September)

Precipitation variation in Kauai (September)

Princeville

In September Princeville generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 24°C (75°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Min temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Monthly sun hours
263 hours
242 hours
209 hours
Monthly rainfall
49 mm (1.9 in)
49 mm (1.9 in)
68 mm (2.7 in)
Monthly rainy days
17 days
16 days
18 days
Weather conditions

Koloa

In September Koloa generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 24°C (75°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Min temperature
24°C (75°F)
24°C (75°F)
23°C (73°F)
Monthly sun hours
263 hours
242 hours
209 hours
Monthly rainfall
45 mm (1.8 in)
46 mm (1.8 in)
65 mm (2.6 in)
Monthly rainy days
17 days
16 days
17 days
Weather conditions

Kapaa

In September Kapaa generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 24°C (75°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Min temperature
24°C (75°F)
24°C (75°F)
23°C (73°F)
Monthly sun hours
263 hours
242 hours
209 hours
Monthly rainfall
69 mm (2.7 in)
65 mm (2.6 in)
81 mm (3.2 in)
Monthly rainy days
17 days
16 days
18 days
Weather conditions

Lihue

In September Lihue generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 24°C (75°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Min temperature
24°C (75°F)
24°C (75°F)
23°C (73°F)
Monthly sun hours
263 hours
242 hours
209 hours
Monthly rainfall
67 mm (2.6 in)
64 mm (2.5 in)
80 mm (3.1 in)
Monthly rainy days
17 days
16 days
18 days
Weather conditions

Hanalei

In September Hanalei generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 24°C (75°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Min temperature
24°C (75°F)
24°C (75°F)
23°C (73°F)
Monthly sun hours
263 hours
242 hours
209 hours
Monthly rainfall
49 mm (1.9 in)
49 mm (1.9 in)
68 mm (2.7 in)
Monthly rainy days
17 days
16 days
18 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Kauai, in the United States of America.

Popular cities in September

Day & night temperatures, rainfall and average weather in Kauai in September.

City Weather Day temp Night temp Rainfall
Princeville 28°C (82°F) 24°C (75°F) 49 mm (1.9 in)
Koloa 28°C (82°F) 24°C (75°F) 46 mm (1.8 in)
Kapaa 28°C (82°F) 24°C (75°F) 65 mm (2.6 in)
Lihue 28°C (82°F) 24°C (75°F) 64 mm (2.5 in)
Hanalei 28°C (82°F) 24°C (75°F) 49 mm (1.9 in)

Kauai weather in September: frequently asked questions

What is the weather like in Kauai, the United States of America in September?

In September, Kauai, the United States of America generally has perfect weather conditions. Princeville sees daytime temperatures near 28°C (82°F), with nights cooling to roughly 24°C (75°F).

What is the average temperature in Kauai, the United States of America in September?

In Princeville, the average daytime high in September is 28°C (82°F), while nighttime temperatures drop to around 24°C (75°F).

Does Kauai, the United States of America get a lot of rain in September?

Rain is generally moderate to light in Kauai, the United States of America during September, with Princeville averaging close to 49 mm (1.9 in).

Is September a Good Time to Visit Kauai, the United States of America?

Given the typically perfect weather conditions in Princeville, September might be a good time to visit Kauai, the United States of America. However, the weather conditions may vary depending on your destination.

Generally speaking, the best visiting conditions can be found in offering mostly perfect weather in Princeville.

Interested in more climate information?

We have much more information about the climate in Kauai.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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