Hawaii in september: average Weather, Temperature and Climate, Where to go?
Weather in Hawaii in september 2025
Below, check out the weather forecast for september for most popular cities in Hawaii. These datas are statistics for september from weather reports for over 10 years. The percentage indicates the probability of having the weather indicated.
Average weather in september in Honolulu (Oahu)
perfect weather UV index: 7
Weather at 6am
79°F
Partly Cloudy
48% of time
26%
20%
7%
Weather at 12pm
83°F
Clear/Sunny
56% of time
22%
20%
3%
Weather at 6pm
77°F
Moderate rain at times
37% of time
30%
29%
4%
Weather at 3am
77°F
45%
27%
21%
7%
More information about the weather in Honolulu (Oahu) in september
Where to go in Hawaii in september?
Where to go in Hawaii in september: destination map
Where to go in each region in september?
| Big Island (Hilo, Pahala, Captain Cook...) | 72°F to 81°F | 2 à 11 days | 81°F | good weather* |
| Kauaʻi (Niihau, Kekaha, Kilauea...) | 83°F | 2 à 4 days | 81°F | good weather* |
| Maui (Molokai, Kahului, Hana...) | 81°F to 85°F | 1 à 2 days | 81°F | perfect weather |
| O'ahu (Honolulu (Oahu), Waianae, La'ie...) | 83°F to 85°F | 2 à 4 days | 81°F to 83°F | good weather* |
Where should you go in Hawaii in september when it comes to the weather?
Remember:
The climate in Hawaii in september ranges from perfect to good depending on the region and city.
You are lucky: It is not perfect, however, the weather in Hawaii in september is, on average, good in Maui, Niihau, Kahoolawe, Oahu (Honolulu), Lanai, Kauai (Garden Isle) and Molokai. I allows to savor vacation in these cities. And even why not take a little time to enjoy the hotel pool!
If you do not go to spend your time in a lounger by the pool, but, for example for hiking, the city of island of Hawaii (Big Island) have a decent enough weather for it in september.
Climate in Hawaii in september
Climate in Honolulu (Oahu) in september
In september, the mean temperature in Oahu (Honolulu) is 81°F (maximum temperature is 83°F and minimum temperature is 79°F). The climate is burning there in this month. With about 2.6in over 3 days, rain may be scarce throughout your holidays.
With a good climate, the month of september is a good time to go there in Hawaii.
| September | |||
| Average temperature | 81°F | ||
| Highest temperature | 83°F | ||
| Lowest temperature | 79°F | ||
| Sea temperature | 81°F | ||
| Rainfall | 2.6in | ||
| Number of days with rainfall | 3 day(s) (11%) | ||
| Humidity | 77% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 33% | ||
| Length of day | 12:16 | ||
| Our opinion at whereandwhen.net | perfect |
Climate in Kauai (Garden Isle) in september
In the month of september, the mean temperature in Kauai (Garden Isle) is 81°F (maximum temperature is 83°F and minimum temperature is 79°F). The climate comfortable in this city in the month of september. With 3.3in over 4 days, you risk getting wet slightly during your vacations. But this is rather moderate and you will not be too bothered by it.
With good weather conditions, september is an advisable month to go in Kauai (Garden Isle).
| September | |||
| Average temperature | 81°F | ||
| Highest temperature | 83°F | ||
| Lowest temperature | 79°F | ||
| Sea temperature | 81°F | ||
| Rainfall | 3.3in | ||
| Number of days with rainfall | 4 day(s) (15%) | ||
| Humidity | 78% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 38% | ||
| Length of day | 12:16 | ||
| Our opinion at whereandwhen.net | good |
Climate in Maui in september
In the month of september, the mean temperature in Maui is 81°F (maximum temperature is 81°F and minimum temperature is 79°F). The climate is very warm in this location in this month. It almost never rains during september. You will not get wet throughout your vacations!
With a good weather, september is a good month to go in this city.
| September | |||
| Average temperature | 81°F | ||
| Highest temperature | 81°F | ||
| Lowest temperature | 79°F | ||
| Sea temperature | 81°F | ||
| Rainfall | 0.9in | ||
| Number of days with rainfall | 1 day(s) (3%) | ||
| Humidity | 77% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 24% | ||
| Length of day | 12:15 | ||
| Our opinion at whereandwhen.net | perfect |
Climate in Hilo in september
In the month of september, maximum temperature is 77°F and minimum temperature is 74°F (for an average temperature of 76°F). The climate is quite comfortable in this location in the month of september. With 3.9in over 5 days, you risk getting wet slightly during your trip. But this is rather reasonably and it will not be continuous.
With good weather conditions, the month of september is a recommended month to go in this locality in Hawaii.
| September | |||
| Average temperature | 76°F | ||
| Highest temperature | 77°F | ||
| Lowest temperature | 74°F | ||
| Sea temperature | 80°F | ||
| Rainfall | 3.9in | ||
| Number of days with rainfall | 5 day(s) (18%) | ||
| Humidity | 80% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 31% | ||
| Length of day | 12:14 | ||
| Our opinion at whereandwhen.net | good |
Climate in Captain Cook in september
In the month of september, the mean temperature in Captain Cook is 74°F (maximum temperature is 76°F and minimum temperature is 70°F). The climate is quite good in this location in the month of september. With 3.8in over 6 days, you risk getting wet slightly throughout your journey. But this is moderate and you will not be too bothered by it.
With a correct climate, the month of september is okay (but not good month) for traveling in that area in Hawaii.
| September | |||
| Average temperature | 74°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 70°F | ||
| Sea temperature | 81°F | ||
| Rainfall | 3.8in | ||
| Number of days with rainfall | 6 day(s) (22%) | ||
| Humidity | 82% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 29% | ||
| Length of day | 12:15 | ||
| Our opinion at whereandwhen.net | good |
All cities in Hawaii in september
| Honolulu (Oahu) in september | perfect weather |
| Kauai (Garden Isle) in september | good weather |
| Maui in september | perfect weather |
| Hilo in september | good weather |
| Captain Cook in september | good weather |
| Hana in september | perfect weather |
| Kahului in september | perfect weather |
| Kekaha in september | perfect weather |
| Kilauea in september | good weather |
| La'ie in september | good weather |
| Molokai in september | perfect weather |
| Niihau in september | perfect weather |
| Pahala in september | good weather |
| Waianae in september | perfect weather |
| island of Hawaii (Big Island) in september | perfect weather |
| Kahoolawe in september | perfect weather |
| Lanai in september | perfect weather |
| Lihue in september | good weather |
| 'Aiea in september | perfect weather |
| 'Ewa Beach in september | perfect weather |
| Anahola in september | good weather |
| Hale'iwa in september | good weather |
Weather data for Hawaii in september:
Weather data for Hawaii in september is derived from an average of the weather forecast since 2009 in Hawaii. There is a margin of error and these forecasts are to be considered as general information only. The weather in Hawaii can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Hawaii.