Taiwan Taipei Weather in September — Climate Guide
September in Taipei is Good
September is Good for Taipei.
September is the start of the sweet spot — slightly cooler 31°C/25°C, humidity drops, typhoon frequency reduces. **Mid-Autumn Festival (variable, around mid-September)** is the family BBQ holiday — mooncakes, pomelos, fireworks. Last warm beach weeks. Hotel prices drop 30% from August.
Travel score
Summer's end + typhoon tail + avoid Korean Chuseok week
September Weather at a Glance
September averages 88°F / 31°C highs and 75°F / 24°C lows — summer's end. 9 rainy days, 210mm. Humidity 80% drops. Typhoon season tail (late September). 5 hours of sunshine.
September Travel Advice
Short sleeves + light cardigan + folding umbrella + SPF 50. Late September begins autumn. Korean Chuseok (varies by year, mid-September to early October) drives fare spikes — post-Chuseok week is the value window.
Flying In from Overseas
Korean Chuseok — Asia-Taipei round-trip $350-620. Post-Chuseok is the value window $210-380.
September Pricing Trends
Summer peak end — Ximending 3-star $55-100/night. Chuseok week sees temporary spike.
Taipei September Weather Stats
Avg High
31°C
Avg Low
25°C
Rainy Days
10
226mm total
Sunshine
5.5h
Daily avg
Humidity
79%
Hot humid
UV Index
8
Very high
Wind
13 km/h
Gusts 25
Sea Temp
28°C
Avg water temp
Crowds
Moderate
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
28 μg/m³
PM10
42 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
26°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 25 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Hotel prices drop 30%
- Mid-Autumn Festival cultural moment
- Last beach weeks
- Reduced typhoon frequency
Cons
- Still hot + humid
- Mid-Autumn Festival hotel spike for 3-day weekend
- Some rain
September Events & Festivals
- Mid-Autumn Festival (variable, Sept-Oct)
- Mooncake season
- Reduced typhoon frequency
Taipei in September — Full Picture
September is the start of the sweet spot — slightly cooler 31°C/25°C, humidity drops, typhoon frequency reduces. **Mid-Autumn Festival (variable, around mid-September)** is the family BBQ holiday — mooncakes, pomelos, fireworks. Last warm beach weeks. Hotel prices drop 30% from August.
What to Wear & What to Pack
Late summer transitioning — t-shirts + shorts still, light cardigan evening. Humidity slowly drops by month-end. Sunscreen + sun hat still needed.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
24.7°C
19°C
12.3/mo
Summer (Jun·Jul·Aug)
32.3°C
25.3°C
12.3/mo
Autumn (Sep·Oct·Nov)
Current27.7°C
22°C
8.3/mo
Winter (Dec·Jan·Feb)
18.7°C
14°C
9.3/mo
Taipei Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 18° | 13° | 9d·86mm | 3.5h | 80% | 4 | Moderate | Shoulder | |
| 18° | 14° | 12d·138mm | 3h | 82% | 4 | Moderate | Shoulder | |
| 21° | 16° | 12d·168mm | 3.5h | 80% | 5 | Moderate | Shoulder | |
| 25° | 19° | 12d·167mm | 3.5h | 78% | 6 | Moderate | Shoulder | |
| 28° | 22° | 13d·232mm | 4h | 79% | 8 | Moderate | Shoulder | |
| 31° | 24° | 14d·281mm | 4.5h | 80% | 9 | Busy | Peak | |
| 33° | 26° | 11d·226mm | 6.5h | 78% | 10 | Busy | Peak | |
| 33° | 26° | 12d·286mm | 6.5h | 78% | 10 | Busy | Peak | |
| 31° | 25° | 10d·226mm | 5.5h | 79% | 8 | Moderate | Shoulder | |
| October (Best) | 28° | 22° | 8d·134mm | 5.5h | 75% | 7 | Moderate | Shoulder |
| November (Best) | 24° | 19° | 7d·86mm | 3.5h | 76% | 5 | Moderate | Shoulder |
| 20° | 15° | 7d·73mm | 3.5h | 77% | 4 | Busy | Peak |
View Other Months
Taipei September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Taipei?
Taipei in September is Good. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Taipei in September?
Taipei September averages a high of 31°C and a low of 25°C.
Does it rain much in Taipei in September?
Taipei September averages 226mm of rainfall over about 10 rainy days.
What should I wear in Taipei in September?
Late summer transitioning — t-shirts + shorts still, light cardigan evening. Humidity slowly drops by month-end. Sunscreen + sun hat still needed.
What time are sunrise and sunset in Taipei in September?
Taipei September sunrise is 05:50 and sunset is 18:00, with 12h 10m of daylight.
What's the air quality like in Taipei in September?
Taipei September air quality (AQI) averages 60, rated Moderate. PM2.5 averages 28μg/m³.
What activities are recommended in Taipei in September?
In September, Taipei is great for Mid-Autumn BBQ + mooncakes, Last beach trip, Night market food tours.
Is September peak season in Taipei?
Taipei September crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Taipei
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.