Honolulu weather in September (Hawaii, United States of America)

This month is known as a warm month. The average maximum daytime temperature in Honolulu in September lies at 29.3°C (84.74°F). The average minimum temperature goes down to around 21.7°C (71.06°F) (often the minimum temperature is noted at night).

Rainfall during September is moderate with an average of 54mm (2.1 inches). There are generally around 16 rainy days. If you enjoy blue skies and sunshine, then this is a great time to go to Honolulu with 279 hours of sun during the entire month.

 

Honolulu, monthly averages in September

Show in Fahrenheit

Min Temperature 21 °C  

Max Temperature 29 °C  

Water Temperature 27 °C *  

Chance of Rain 56%  

Precipitation 53mm  

Rainy days 17 days  

Humidity 66% *  

Sunshine 279 hrs *  

Percentage Sunshine 76% *  

Where to go in the United States of America in September

Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in September? Visitors traveling to Honolulu might want to wear airy clothing, t-shirts and other summer cloths. Shorts for men made of cotton or linen are good options for staying cool on a hot day. With a water temperature of around 27.0°C (80.6°F), this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

8/10

Outdoor sports

8/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Honolulu.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find 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 climate conditions. Find out where to go with our weather planner.