Nanjing Weather in September

Nanjing's September 2025 has temps 19-37°C, with rain, thunderstorms and fog sometimes. Winds are light (level 1-3) from varied directions. AQI stays 16-66 (mostly excellent, few good). Weather shifts between cloudy, rainy and sunny.

	Average Maximum	Average Minimum	Highest Maximum	Lowest Minimum
℃	29.7°	23.2°	37°	19°
℉	85.5°	73.8°	98.6°	66.2°

Sunny: 5 days

Cloudy: 11 days

Rainy: 7 days

Foggy: 7 days

What to wear and bring in Nanjing in September?

Early September

In early September, Nanjing has temperatures between 23 and 37°C. Heavy rain or fog also happens from time to time. Days are hot, so you need light, airy clothes—like cotton T-shirts and shorts. Evenings get cooler, so you must pack a thin long-sleeve shirt or a light jacket. Sudden rain showers are common, so a small waterproof jacket or an umbrella is needed. Pick comfortable shoes that keep water out; this way, your feet won't get wet on rainy days. When it's sunny, don't forget sunscreen and a hat. You should also carry a small bag. It can hold your rain gear when the sun comes up.

Mid September

Mid September sees temps 20-36°C, with more cloudy days and occasional thunderstorms. Opt for layered clothing—like a short-sleeve top with a light cardigan or hoodie—that you can add or remove as the temperature changes. Closed-toe shoes are still practical for possible rain, while breathable sneakers work for daily outings. Bring a reusable water bottle to stay hydrated on warmer days, and pack insect repellent for evenings. A small portable charger is useful too, as cloudy weather might drain your phone battery faster.

Late September

In late September, Nanjing has temperatures between 19 and 31°C. It gets cooler. This is more true in the morning and evening. You need light layers. You can wear long-sleeve shirts or thin sweaters. For cool times, add a light jacket. You might still get rain. It could be moderate rain or showers. So keep an umbrella handy. Waterproof shoes are still a good choice. Some days have fog. The air is fresh. Its quality is good. You don't need sunscreen as much. But you can bring it if it's sunny. When it's warm, a small bag works to carry your jacket or rain gear.

Touring Nanjing in September

Tour Nanjing in September. Don't miss the bright spider lilies at Niushou Mountain. Don't miss the sunflower fields at Xuanwu Lake either. They look lovely in autumn. Xuanwu Lake has an autumn flower show. It starts on Sept 30. It has osmanthus and chrysanthemums. Join this show. Try local foods. They are savory crab roe noodles, fragrant sweet osmanthus cakes and hot duck blood vermicelli soup. These foods fit the mild weather well.

By Kristen Qin
Web Editor