Hawaii (Honolulu) · September
Best travel monthTravel seasonUSA · North America
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 27° (81°)23– (73–)28 (82) | 27° (81°)23– (73–)29 (84) | 27° (81°)23– (73–)29 (84) | 28° (82°)25– (77–)30 (86) | 29° (84°)26– (79–)31 (88) | 30° (86°)28– (82–)31 (88) | 31° (88°)28– (82–)32 (90) | 31° (88°)28– (82–)32 (90) | 31° (88°)28– (82–)32 (90) | 30° (86°)27– (81–)31 (88) | 29° (84°)25– (77–)31 (88) | 28° (82°)24– (75–)29 (84) |
Ø night, range from coldest to warmest nightØ nightrange | 21° (70°)16– (61–)23 (73) | 21° (70°)16– (61–)23 (73) | 21° (70°)17– (63–)23 (73) | 22° (72°)18– (64–)24 (75) | 23° (73°)20– (68–)24 (75) | 24° (75°)21– (70–)25 (77) | 25° (77°)22– (72–)26 (79) | 25° (77°)22– (72–)26 (79) | 25° (77°)22– (72–)26 (79) | 24° (75°)21– (70–)26 (79) | 23° (73°)19– (66–)25 (77) | 22° (72°)18– (64–)24 (75) |
☀️Sunshine | 7h UV 7 | 7h UV 7 | 7h UV 8 | 8h UV 9 | 8h UV 9 | 9h UV 9 | 9h UV 9 | 9h UV 9 | 9h UV 9 | 8h UV 8 | 7h UV 7 | 5h UV 6 |
🌊Water Temp | 25° (77°) | 25° (77°) | 25° (77°) | 25° (77°) | 26° (79°) | 26° (79°) | 27° (81°) | 27° (81°) | 27° (81°) | 27° (81°) | 26° (79°) | 25° (77°) |
🌧Rain Days | 3d47mm (1.8") | 4d40mm (1.6") | 4d67mm (2.6") | 2d25mm (1.0") | 2d29mm (1.1") | 1d14mm (0.5") | 1d11mm (0.4") | 1d20mm (0.8") | 2d23mm (0.9") | 2d35mm (1.4") | 2d39mm (1.5") | 3d65mm (2.6") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Travel season — mid-range prices, good availability.
September is among the best months in Hawaii (Honolulu): only 2 rain days, 31°C (88°F) highs, and good sunshine make for ideal holiday conditions.
Daytime highs average 31°C (88°F), cooling to 25°C (77°F) at night (daily average: 27°C (81°F)). Peaks reach around 32°C (90°F), the coldest nights around 22°C (72°F). The sun shines an average of 9 hours per day; there are 2 rain days with 23 mm (0.9 in) total. The water is a warm 27°C (81°F) — perfect for snorkelling and swimming.
Pack light summer clothing, sunscreen, and swimwear — beach and water conditions in September are ideal.
Events & Festivals
- Aloha Festivalsvaries (September, several weeks)
Hawaii's oldest cultural festival (since 1946) celebrates Polynesian tradition with hula, music and one of the islands' biggest free street parties on Kalakaua Avenue in Waikiki. The highlight is the floral parade on the last weekend of September.
Packing list for Hawaii (Honolulu) in September
- Light summer clothes
- Swimwear and beach towel
- SPF 50 sunscreen
- Sunglasses
- Sun hat
- Insect repellent
- Travel first-aid kit
Frequently Asked Questions
- Is September a good time to visit Hawaii (Honolulu)?
- Yes — September is one of the best months to visit Hawaii (Honolulu) (Climate Score: 89/100). Pleasant temperatures (31°C (88°F)), good sunshine (9 h/day), and few rain days (2) make it one of the most recommended months.
- How warm is it in Hawaii (Honolulu) in September?
- In September, Hawaii (Honolulu) sees daily highs of 31°C (88°F). Nights cool to 25°C (77°F), with a daily average of 27°C (81°F). Peaks reach around 32°C (90°F), the coldest nights around 22°C (72°F).
- How much rain falls in Hawaii (Honolulu) in September?
- In September, Hawaii (Honolulu) receives an average of 23 mm (0.9 in) of rain over 2 rain days. That is comparatively dry.
- How many sunshine hours does Hawaii (Honolulu) get in September?
- Hawaii (Honolulu) averages 9 sunshine hours per day in September — above the annual average.
- How warm is the water in Hawaii (Honolulu) in September?
- Water temperature in Hawaii (Honolulu) in September averages 27°C (81°F) — ideal for swimming and snorkelling.
