Honolulu in September: weather, rain (23%) and should you go? [2026]

Month summary

Honolulu weather in September

✅ Good

🌡️ Temperature min / max

75°F – 84°F

🌧 Rainy days

23% of days

☀️ Sunshine

11.6h per day on average

🌊 🌊 Season

Autumn

⭐ ⭐ Weather score

8.6/10

📅 📅 Best month

June (9.1/10)

Quick decision

Should you visit Honolulu in September?

✅ Good

✅ Yes if: you want good weather with lower prices than peak season.

❌ No if: you need guaranteed perfect weather — some mixed days are possible.

🌧 Rain : ██░░░░░░░░ 23%

🌡 Temperature : ███████░░░ 84°F

☀️ Sunshine : ████████░░ 11.6h/d

Our take: September in Honolulu is practically perfect—warm days averaging 24–29°C with minimal rain mean you can beach hop freely. You'll get solid sunshine (11.6 hours daily) and a toasty 27°C ocean, ideal for swimmers and water lovers who hate cold sea temps. This is genuinely one of the best months to visit if you're flexible with travel timing.

By trip type

Honolulu in September by trip type

🏙️ 🏙️ City break / culture : ✅ Good
🚶 🚶 Outdoor activities : ✅ Good
🏖️ Beach / swimming : ✅ Good
💰 💰 Budget : 💸 Peak season

Local context

What to expect in September

Autumn in Honolulu is often underrated: 29°F, golden light and declining crowds. An interesting window. Rain risk remains low (23% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if June (9.1/10) remains theoretically better.

Browse by month

All months for Honolulu

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Annual table

Month-by-month comparison

Month	Min °F	Max °F	Rain %	Precip in	Sun h/d	Score
☀️ January	68°F	77°F	24%	0.1in	10.7h	8.2/10
🌤️ February	68°F	77°F	31%	0.1in	10.9h	8.1/10
🌤️ March	68°F	77°F	35%	0.1in	11.4h	8.0/10
🌤️ April	70°F	79°F	39%	0.1in	12.2h	8.2/10
🌤️ May	72°F	81°F	34%	0.1in	13.0h	8.6/10
☀️ June	73°F	82°F	24%	0.0in	13.0h	9.1/10
☀️ July	73°F	84°F	23%	0.0in	12.9h	8.9/10
🌤️ August	75°F	84°F	25%	0.0in	12.7h	8.7/10
☀️ September	75°F	84°F	23%	0.0in	11.6h	8.6/10
🌤️ October	73°F	82°F	31%	0.1in	11.0h	8.5/10
☀️ November	72°F	81°F	22%	0.0in	10.7h	8.6/10
🌤️ December	70°F	79°F	26%	0.1in	10.7h	8.2/10

Ideal Fair Challenging climate ◀ Current month · Source Open-Meteo · 10 years

📊 Data source Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Honolulu averages 84°F, 23% rainy days and 11.6h of sunshine per day. Overall weather score: 8.6/10. See methodology →

Comparison