What to expect in Hawaii in September
September is one of the best times to visit Hawaii. Expect 32° / 24°, manageable crowds at the big attractions and prices close to the yearly average.
Hawaii weather in September
Typical conditions in Hawaii during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 32°C 90°F |
|---|---|
| Average low | 24°C 75°F |
| Rainfall | Dry 25/100 |
| Total rainfall | 18 mm0.7 in |
| Rainy days | 7 |
| Sea temperature | 27°C 80°F |
| Daylight | 12 h 16 min |
| How it feels | Hot — midday shade matters |
Rainfall figures are for Honolulu.
Average highs sit around 32°C with lows near 24°C. It is one of the drier months — pack light.
Crowds & demand
Crowd levels are Moderate for Hawaii — manageable crowds at the big attractions.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Lightweight, breathable clothes, strong sun protection and a refillable bottle — highs near 32°C make midday heat the main constraint. Rain gear is largely optional this month, which keeps your bag light.
What it costs
Costs in September sit around the yearly average for Hawaii — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 36% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- Visitors who want to catch a festival
Events & what’s on
Look out for Aloha Festivals while you’re there.
- Aloha Festivals — Parades, concerts, and cultural events across the islands celebrate Native Hawaiian traditions each September.
Hawaii in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 31° / 24° | High | $$$ | 48 |
| August | 32° / 24° | High | $$$ | 45 |
| September · This month | 32° / 24° | Moderate | $$ | 56 |
| October | 31° / 23° | Moderate | $$ | 58 |
| November | 29° / 21° | Moderate | $$ | 54 |
These months score higher for Hawaii on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
