Temperature in Oahu in September

Daytime highs, nighttime lows and the warmest cities in Oahu, the United States of America this September.

Oahu, the United States of America, a region in the United States of America, typically experiences warm weather in September, with maximum daytime temperatures around 29°C (84°F) and nighttime temperatures around 24°C (75°F) in Honolulu. In Oahu, the United States of America, September typically stands out as the hottest month of the year. If you're planning a visit during this time, it would be wise to come prepared. Packing light and breathable summer cloths will ensure you stay comfortable throughout your stay.

What is the temperature of the different cities in Oahu, the United States of America in September?

To get a sense of September's typical temperatures in the key spots of Oahu, explore the map below. Click on a point for an in-depth look.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit Oahu, check out our Oahu's climate page.

See also: Oahu weather by month.

Best Places to Visit in Oahu in September

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

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in Oahu

Oahu temperatures in September: frequently asked questions

How hot does it get in Oahu, the United States of America in September?

Daytime temperatures in Honolulu typically peak at 29°C (84°F) in September, putting it in the high range.

How cold does it get at night in Oahu, the United States of America in September?

After dark, Honolulu cools to about 24°C (75°F) on an average September night.

How much sun does Oahu, the United States of America get in September?

Honolulu enjoys close to 279 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

What is the water temperature in September?

The water temperature averages approximately 27°C (81°F) in Honolulu this month, a perfect temperature for swimming and cooling off.

Interested in more climate information?

We have much more information about the climate in Oahu.

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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