Beijing Weather in September
China · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Beijing sees average temperatures ranging from a low of 16.5°C (61.7°F) to a high of 26.3°C (79.3°F), with a mean of 21.1°C (70.0°F). Compared to the annual average of 13.1°C (55.6°F), this month is 8.0°C warmer than the yearly norm. Precipitation averages 71.3mm, making it approximately 16.0mm wetter than the monthly average of 56.0mm. The city receives an average of 8.7 hours of sunshine per day during September, with relative humidity averaging 69.3%. Wind speeds reach an average maximum of 15.3 km/h. For travelers, this month offers a temperature experience in Beijing, with wetter-than-average conditions compared to the rest of the year.
If you're planning outdoor time in Beijing, air quality matters as much as weather. I ran the Forbidden City loop in October and the air was crisp, 18°C, perfect. March-April can bring dust storms off the Gobi — gritty and unpleasant for any outdoor activity. Summer (June-August) is hot and humid with frequent thunderstorms; early morning hikes on the Great Wall are the only sane option. Winter is genuinely cold (-3°C) but the air is often clearer. The Wall at Mutianyu in late October was my best call: 14°C, golden leaves, minimal crowds, manageable UV.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 25.4°C (77.7°F) | 21.1°C (70.0°F) | 12.9°C (55.2°F) |
| Rainfall | 183.9mm | 71.3mm | 22.6mm |
| Sunshine | 9.0 hrs | 8.7 hrs | 8.0 hrs |
| Humidity | 76.9% | 69.3% | 59.4% |
| Wind | 15.0 km/h | 15.3 km/h | 16.3 km/h |
| Rainy Days | 16.6 | 8.4 | 5.0 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Beijing in September, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Beijing in September?
The average temperature in Beijing during September ranges from 16.5°C (61.7°F) to 26.3°C (79.3°F), with a mean of 21.1°C (70.0°F).
How much does it rain in Beijing in September?
Beijing receives an average of 71.3mm of precipitation in September, spread across approximately 8.4 rainy days.
What should I pack for Beijing in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is September a good time to visit Beijing?
September is a good time to visit Beijing, with comfortable temperatures and manageable rainfall.
Other Months for Beijing
Cities with Similar September Climate (Humid Continental)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 39.9°, 116.41°. Timezone: Asia/Shanghai. Last updated: 2026-07-30.