Hawaii weather in September 2025
Hawaii weather in September 2025
Day
30 °C
Night
21 °C
Sea
27 °C
Precipitation
85 mm
in month
Rainy days
11 days
in month
Daylight
12 hours
average
Sunshine
8 hours
average
Humidity
72 %
Day
30 °C
Night
21 °C
Sea
27 °C
Precipitation
85 mm
in month
Rainy days
11 days
in month
Daylight
12 hours
average
Sunshine
8 hours
average
Humidity
72 %
Overview: HawaiiHawaii is an archipelago in the central Pacific Ocean, consisting of eight main islands. It is renowned for its breathtaking natural beauty, including pristine beaches, lush rainforests, and majestic volcanoes. To make the most of your trip, consider exploring the unique culture and history of each island, indulging in water activities such as snorkeling and surfing, and experiencing the traditional Hawaiian cuisine and luau festivities.
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Activities in Hawaii
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Sand beaches
in 7 places
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Scuba diving
in 4 places
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Snorkelling
in 5 places
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Surfing
in 3 places
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Windsurfing
in 4 places
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Weather overview and FAQs
Weather overview
In September in Hawaii, the average air temperature ranges from 30 °C (85 °F) during the day to 21 °C (71 °F) at night. There are 11 days of rain on average, where the rainfall is 85 mm (3.34 in).
Is September a good month to visit Hawaii?
In Hawaii in September, there are ideal conditions for a vacation. The daily temperatures in this month reach pleasant 30 °C (85 °F). The seawater temperature reaches ideal 27 °C (80 °F). At night, temperatures hover around a pleasant 21 °C (71 °F).
What is the temperature in Hawaii during the day in September?
In September in Hawaii, the average daily temperatures will be 30 °C (85 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.
What is the sea temperature in September in Hawaii?
The temperature of the sea in Hawaii in September is 27 °C (80 °F). Seems like an ideal temperature for swimming, you can stay in the sea for a long time and enjoy it as well.
What is the average number of rainy days in Hawaii in September?
There are 11 days, which are rainy in Hawaii in September, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.6 days of the week, or in general - 37 % days.
How heavy is the precipitation in Hawaii in September?
In September in Hawaii, there is 85 mm (3.34 in) rainfall, which means on average 3 mm (0.11 in) rainfall per day.
What is the air temperature in September in Hawaii at night?
The average night temperature in September in Hawaii is 21 °C (71 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.
How many hours of sun to expect in September in Hawaii?
There is an average length of sunshine of 8 hours per day in September in Hawaii.
Is there a wet season in Hawaii in September?
No, there is no wet season in September in Hawaii - you can expect 11 days of rain during the month.
How long is the day (from dawn till dusk) in Hawaii in September?
The length of daylight in September in Hawaii is 12 hours.
Is September part of the dry season in Hawaii?
No, September is not a dry month in Hawaii, expect rain approximately 11 days in a month.
Is it hot in Hawaii in September?
In Hawaii in September, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.
How windy is Hawaii in September?
An average wind scale that can be expected in Hawaii in September is 5.
What level of humidity is to expect in Hawaii in September?
Humidity in Hawaii in September is 72 %.
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