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Honolulu, United States · Tropical

Honolulu in September: go or not?

Excellent time. Honolulu in September scores 8.7/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 21.31°N · 157.86°W
⚡ This month's verdict
Go for it
Honolulu · September
8.7
24–29°
Temperature
23%
Rain
9h
Sun
🌴 Tropical☀️ High UV🌧️ Monsoon season
Photo : AussieActive via Unsplash
The month in detail

What to expect in September

Autumn in Honolulu is often underrated: 29.0°C, golden light and declining crowds. An interesting window. Rain risk remains low (23.0% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if June (8.9/10) remains theoretically better.

September ranks 4 out of 12 months in Honolulu. Compared to August: −0.5h of sun per day.

This month's conditions

What it's like in September

UV index
8 · very high
protection essential
Feels like
muggy at times
20°
Sea
27°C
warm, ideal
Daylight
12.1h of daylight
Air quality
good
AQI 21
Compare

Is September the right month?

The best month in Honolulu is June (8.9/10), 0.2 pt higher than September.

See June →See all 12 months →
Context

Our verdict

Honolulu is almost-boring tropical stability: 20-29°C all year, never a really bad season . The real variable is the rain on the windward side: 22-39% depending on the month, but often as brief showers.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · Honolulu
Expedia →
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Activities
Tours, tickets, experiences
See ↓
✈️
Flights
Multi-airline comparator
Kiwi →

🎟️ Activities & tours · Honolulu

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.

Country · United States

🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthJuly · 29°C
❄️Coolest monthJanuary · 25°C
🌧️Rainiest month ⓘApril · 39%

🏝️ Tropical stay

🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore

Other destinations in September

If September doesn't convince you for this destination, compare with others.

Similar climate
AustinUnited StatesSan AntonioUnited StatesTenerifeSpainAsunciónParaguayPort-au-PrinceHaiti
Nearby
Hawaii / MauiUnited States169 kmMauiUnited States170 kmMajuroMarshall Islands3662 kmSan FranciscoUSA3854 km
Other top picks
MaseruLesotho8.7TenerifeSpain8.7La PalmaSpain8.6LanzaroteSpain8.6TofoMozambique8.6
← AugustOctober →
🗺️ See all 754 destinations on the map
Location

Where is Honolulu ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
United States
Tropical climate with a 8.9 → 8.1 gap between best and worst month. 10 years of ERA5 data to choose by project.
21.31°N · 157.86°W
Questions

Frequently asked questions

What is the best time to visit Honolulu?
June is the best month with 28.0°C highs, 23.0°C lows, 9.5h of sunshine and 24.0% rainy days. The months of June & July offer comparable conditions.
How many hours of sunshine does Honolulu get in June?
Honolulu averages 9.5 sunshine hours per day in June. It is the sunniest month with a climate score of 8.4/10.
What is the rainiest month in Honolulu?
February is the most unfavourable month with February has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Honolulu in June?
In June, overnight lows reach 23.0°C, while afternoon highs average 28.0°C.
Is Honolulu good in winter?
In winter (December-February), Honolulu scores 7.7/10 on average — Decent period conditions for cultural visits.. The best month overall remains June with a score of 8.4/10.
When should you avoid Honolulu?
February is the most difficult month to visit Honolulu, with February has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Honolulu in September?
In September, the sea averages 27°C in Honolulu: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Honolulu in September?
The average UV index reaches 8 in September in Honolulu (very high), with about 12.1h of daylight. Protection essential.