United States Honolulu Weather in September — Climate Guide
September in Honolulu is very-high
September is very-high for Honolulu.
Aloha Festivals + hurricane peak. Hotels reasonable post-summer. Korean popular shoulder.
Travel score
Honolulu September Weather Stats
Avg High
30°C
Avg Low
24°C
Rainy Days
5
25mm total
Sunshine
10h
Daily avg
Humidity
65%
moderate
UV Index
11
Extreme
Wind
14 km/h
Gusts 30
Sea Temp
27°C
swimming
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
6 μg/m³
PM10
15 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
32°C
Nighttime
25°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 30 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Aloha Festivals
- Hotels reasonable
- Korean shoulder
Cons
- Hurricane peak risk
September Events & Festivals
- Aloha Festivals
- Hurricane peak
Honolulu in September — Full Picture
Aloha Festivals + hurricane peak. Hotels reasonable post-summer. Korean popular shoulder.
What to Wear & What to Pack
Hot tropical.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
27.7°C
21°C
6/mo
Summer (Jun·Jul·Aug)
30°C
23.7°C
3.7/mo
Autumn (Sep·Oct·Nov)
Current29.7°C
23°C
7/mo
Winter (Dec·Jan·Feb)
27°C
20.3°C
10.3/mo
Honolulu Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 27° | 20° | 11d·100mm | 7h | 70% | 8 | Very busy | Peak | |
| February (Best) | 27° | 20° | 9d·80mm | 8h | 68% | 9 | Very busy | Peak |
| March (Best) | 27° | 20° | 7d·60mm | 8h | 67% | 9 | Busy | Shoulder |
| April (Best) | 28° | 21° | 6d·30mm | 9h | 65% | 10 | Busy | Shoulder |
| May (Best) | 28° | 22° | 5d·30mm | 10h | 65% | 11 | Very busy | Peak |
| June (Best) | 29° | 23° | 4d·15mm | 11h | 63% | 11 | Very busy | Peak |
| July (Best) | 30° | 24° | 3d·10mm | 11h | 65% | 12 | Very busy | Peak |
| August (Best) | 31° | 24° | 4d·15mm | 11h | 65% | 12 | Very busy | Peak |
| September (Best) | 30° | 24° | 5d·25mm | 10h | 65% | 11 | Busy | Shoulder |
| October (Best) | 30° | 23° | 7d·50mm | 9h | 67% | 9 | Moderate | Shoulder |
| November (Best) | 29° | 22° | 9d·80mm | 8h | 70% | 8 | Moderate | Shoulder |
| 27° | 21° | 11d·100mm | 7h | 70% | 7 | Very busy | Peak |
View Other Months
Honolulu September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Honolulu?
Honolulu in September is very-high. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Honolulu in September?
Honolulu September averages a high of 30°C and a low of 24°C.
Does it rain much in Honolulu in September?
Honolulu September averages 25mm of rainfall over about 5 rainy days.
What should I wear in Honolulu in September?
Hot tropical.
What time are sunrise and sunset in Honolulu in September?
Honolulu September sunrise is 06:15 and sunset is 18:25, with 12h 10min of daylight.
What's the air quality like in Honolulu in September?
Honolulu September air quality (AQI) averages 25, rated Good. PM2.5 averages 6μg/m³.
What activities are recommended in Honolulu in September?
In September, Honolulu is great for Aloha Festivals, Waikiki, Diamond Head.
Is September peak season in Honolulu?
Honolulu September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Honolulu
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.