China Beijing Weather in September — Climate Guide
September in Beijing is very-high
September is very-high for Beijing.
September opens Beijing's best stretch of the year. The summer heat and humidity drop away, days settle into a comfortable mid-20s°C, evenings cool pleasantly, and rainfall falls off sharply — leaving the clear, dry, blue-sky weather the city is loved for in autumn.
This is the ideal time for the Great Wall, the Forbidden City, and the Summer Palace, with crisp air and excellent visibility. Crowds and prices climb because everyone knows it's the prime season, and the Mid-Autumn Festival (a public holiday whose date moves with the lunar calendar) adds a short domestic-travel surge — book ahead.
Travel score
Beijing September Weather Stats
Avg High
26°C
Avg Low
14°C
Rainy Days
7
50mm total
Sunshine
8h
Daily avg
Humidity
55%
comfortable
UV Index
6
High
Wind
9 km/h
Gusts 20
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
35 μg/m³
PM10
70 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
26°C
Nighttime
14°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 20 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Start of the best season — mild and dry
- Clear skies and excellent air quality
- Comfortable temperatures
- Ideal for the Great Wall and outdoor sights
Cons
- High-season prices and crowds
- Mid-Autumn Festival briefly busier
- Occasional early-month warmth and showers
- Books up fast
September Events & Festivals
- Autumn begins — mild, dry, and clear
- Best air quality and skies of the year approaching
- Mid-Autumn Festival public holiday (date varies)
- Comfortable, less humid weather
Beijing in September — Full Picture
September opens Beijing's best stretch of the year. The summer heat and humidity drop away, days settle into a comfortable mid-20s°C, evenings cool pleasantly, and rainfall falls off sharply — leaving the clear, dry, blue-sky weather the city is loved for in autumn.
This is the ideal time for the Great Wall, the Forbidden City, and the Summer Palace, with crisp air and excellent visibility. Crowds and prices climb because everyone knows it's the prime season, and the Mid-Autumn Festival (a public holiday whose date moves with the lunar calendar) adds a short domestic-travel surge — book ahead.
Early September can still throw a warm, slightly humid day, and there's the occasional shower, but overall conditions are reliably good and improving as the month goes on. Pack light layers for warm afternoons and cooler evenings, and make the most of the clear skies for the outdoor and panoramic sights.
What to Wear & What to Pack
The start of the best season — warm days around 26°C, cooler evenings near 14°C. Light layers with a jacket for evenings. Pleasant and increasingly clear.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
19.3°C
7.3°C
3.3/mo
Summer (Jun·Jul·Aug)
30.3°C
20.7°C
10.7/mo
Autumn (Sep·Oct·Nov)
Current18.3°C
6.7°C
4.3/mo
Winter (Dec·Jan·Feb)
3.3°C
-6.3°C
1/mo
Beijing Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 2° | -8° | 1d·3mm | 6.5h | 45% | 2 | Quiet | Low season | |
| 5° | -5° | 1d·5mm | 7h | 45% | 3 | Moderate | Shoulder | |
| 12° | 0° | 2d·9mm | 7.5h | 45% | 4 | Moderate | Shoulder | |
| 20° | 8° | 3d·22mm | 8h | 50% | 6 | Busy | Peak | |
| May (Best) | 26° | 14° | 5d·35mm | 8.5h | 50% | 8 | Very busy | Peak |
| 30° | 19° | 8d·70mm | 8h | 55% | 9 | Busy | Shoulder | |
| 31° | 22° | 13d·175mm | 6.5h | 65% | 9 | Very busy | Peak | |
| 30° | 21° | 11d·160mm | 7h | 65% | 8 | Very busy | Peak | |
| September (Best) | 26° | 14° | 7d·50mm | 8h | 55% | 6 | Busy | Peak |
| October (Best) | 19° | 7° | 4d·22mm | 7.5h | 50% | 4 | Very busy | Peak |
| 10° | -1° | 2d·10mm | 6.5h | 50% | 2 | Moderate | Shoulder | |
| 3° | -6° | 1d·3mm | 6.5h | 45% | 2 | Quiet | Low season |
View Other Months
Beijing September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Beijing?
Beijing in September is very-high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Beijing in September?
Beijing September averages a high of 26°C and a low of 14°C.
Does it rain much in Beijing in September?
Beijing September averages 50mm of rainfall over about 7 rainy days.
What should I wear in Beijing in September?
The start of the best season — warm days around 26°C, cooler evenings near 14°C. Light layers with a jacket for evenings. Pleasant and increasingly clear.
What time are sunrise and sunset in Beijing in September?
Beijing September sunrise is 05:50 and sunset is 18:25, with 12h 35min of daylight.
What's the air quality like in Beijing in September?
Beijing September air quality (AQI) averages 70, rated Moderate. PM2.5 averages 35μg/m³.
What activities are recommended in Beijing in September?
In September, Beijing is great for Great Wall at Mutianyu under clear skies, Forbidden City and Jingshan panorama, Summer Palace and Kunming Lake.
Is September peak season in Beijing?
Beijing September crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Beijing
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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.