Monthly climate guide
Nanjing weather in September
September in Nanjing is typically hot, with average daytime highs around 28°C (83°F) and night-time lows near 19°C (66°F). The month usually brings about 105 mm of rain (wet) and is often cloudy. Daytime highs are 4°C cooler than August and 5°C warmer than October.
What stands out in September
- Just 470 km apart, but Nanjing runs about 3°C warmer than Qingdao this month.
- Humidity near 78% makes 28°C feel stickier than it sounds.
- It cools down fast from here: October is about 5°C cooler.
- Seasonally, September counts as early autumn in Nanjing.
Avg high
28°C
83°F
Avg low
19°C
66°F
Rainfall
105 mm
wet
Humidity
78%
relative
Sky
64%
cloud · often cloudy
Nanjing weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 8°C / 46°F | -2°C / 29°F | 49 mm | 77% | 63% |
| February | 10°C / 50°F | 0°C / 32°F | 61 mm | 77% | 67% |
| March | 16°C / 61°F | 5°C / 40°F | 70 mm | 75% | 65% |
| April | 22°C / 72°F | 10°C / 50°F | 89 mm | 73% | 64% |
| May | 28°C / 82°F | 16°C / 61°F | 92 mm | 71% | 71% |
| June | 30°C / 87°F | 21°C / 69°F | 218 mm | 75% | 78% |
| July | 32°C / 90°F | 25°C / 76°F | 245 mm | 82% | 73% |
| August | 32°C / 90°F | 24°C / 76°F | 174 mm | 80% | 66% |
| September | 28°C / 83°F | 19°C / 66°F | 105 mm | 78% | 64% |
| October | 23°C / 74°F | 13°C / 55°F | 71 mm | 74% | 58% |
| November | 17°C / 63°F | 7°C / 44°F | 65 mm | 77% | 58% |
| December | 10°C / 49°F | 0°C / 31°F | 41 mm | 75% | 53% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- A compact umbrella or packable rain jacket
- Water-resistant shoes
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is September a good time to visit Nanjing?
Compare the months in the chart above to find your ideal window.
Best time to visit Nanjing →Other China cities in September
Cite or embed this data
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Nanjing weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/china/nanjing/september
<a href="https://weathercompare.eu/weather/china/nanjing/september">Nanjing weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/china/nanjing" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Nanjing weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/china/nanjing/september">Nanjing weather in September</a> – WeatherCompare</p>
Nanjing in September: quick answers
Is September a good time to visit Nanjing?
September is one of the wetter months in Nanjing, with about 105 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Nanjing in September?
Average highs are about 28°C (83°F) and average lows about 19°C (66°F), based on 10 years of daily data.
Does it rain a lot in Nanjing in September?
Nanjing typically gets around 105 mm of rain in September — wet.
Figures are long-term averages for the area around Nanjing (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.