Nanjing in Summer
In summer (June, July and August), Nanjing sees average daytime highs around 31°C and overnight lows near 24°C, with 606 mm of rain over about 41 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 20% of the time across summer, and the air most often feels miserable.
Summer is Nanjing's 3rd-best season to visit on our travel score. For the whole year in context, see Nanjing's year-round climate.
- Avg daytime high
- 31°C
- warmest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 606 mm
- 41 wet days
- Avg wind
- 10 km/h
- Travel score
- 4.2
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Nanjing in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in Nanjing reaches about 31°C and drops to 24°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Nanjing
Once humidity and wind are folded in, summer brings about 70 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Nanjing weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 7° / 0° | 55 | 8 | 2 | 10.1 | 1.0 |
| Feb | 10° / 2° | 55 | 8.3 | 1.3 | 10.8 | 2.2 |
| Mar | 15° / 6° | 80 | 10 | 0.4 | 11.8 | 4.3 |
| Apr | 21° / 12° | 94 | 9.1 | 0 | 12.8 | 6.4 |
| May | 26° / 17° | 121 | 9.8 | 0 | 13.6 | 6.6 |
| Jun | 29° / 22° | 222 | 11.9 | 0 | 14.1 | 5.2 |
| Jul | 32° / 25° | 210 | 15.1 | 0 | 13.9 | 3.5 |
| Aug | 31° / 25° | 174 | 14.4 | 0 | 13.2 | 3.9 |
| Sep | 27° / 20° | 81 | 8.4 | 0 | 12.2 | 6.4 |
| Oct | 22° / 14° | 54 | 6.3 | 0 | 11.2 | 7.4 |
| Nov | 16° / 8° | 53 | 6.8 | 0.1 | 10.4 | 5.5 |
| Dec | 10° / 2° | 34 | 5.6 | 0.4 | 9.9 | 2.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 20% of the time across summer.
Chance of precipitation in Summer
Nanjing gets around 606 mm of rain over 41 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 54 min in early June to 12 h 42 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.9 kWh/m².
Hazard calendar for Nanjing
In summer, Nanjing overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Nanjing sits in the Pacific typhoon belt; the season peaks July–October.
Nanjing's rainy season runs May–August, when most of the year's rain falls.
Is summer a good time to visit Nanjing?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Nanjing for sightseeing.
What to pack for Nanjing in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Nanjing sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 41 days see rain.
UV index in Nanjing in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nanjing peaks around July 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 6 | 6 | 7 | 6 | 9 | 8 | 9 | 5 | 3 | 3 |
| Level | Moderate | Moderate | High | High | High | High | Very high | Very high | Very high | Moderate | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 6 | High |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 9 | Very high |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 3 | Moderate |
Air quality in Nanjing in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Nanjing is worst in January — around 59 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (August, 29 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Nanjing's WHO annual average of 44.7 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 59 | 55 | 53 | 48 | 42 | 36 | 29 | 29 | 35 | 44 | 49 | 58 |
| Level | Unhealthy | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Poor | Poor | Poor | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 59 | Unhealthy |
| Feb | 55 | Poor |
| Mar | 53 | Poor |
| Apr | 48 | Poor |
| May | 42 | Poor |
| Jun | 36 | Poor |
| Jul | 29 | Moderate |
| Aug | 29 | Moderate |
| Sep | 35 | Poor |
| Oct | 44 | Poor |
| Nov | 49 | Poor |
| Dec | 58 | Unhealthy |
Where is Nanjing?
Nanjing sits at 32.1°N, 118.8°E, 22 m above sea level, in China. The nearest listed city is Wuxi, 153 km away.
Topography around Nanjing
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nanjing.
Within 3 km, the terrain around Nanjing has only modest variations in elevation — a maximum elevation change of 59 m around an average of 15 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 514 m; within 80 km, large variations in elevation — a maximum elevation change of 611 m.
The land around Nanjing is covered by artificial surfaces (66%) and trees (22%) within 3 km, artificial surfaces (46%) and trees (28%) within 16 km, and cropland (51%) and trees (28%) within 80 km.
China travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / I
- 220 V · 50 Hz
- Prices
- ≈ 47% of US
- price level, 2025
- GDP per capita
- $13,862
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Homicide rate
- 0.5
- per 100k, 2020
- Road deaths
- 17.4
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 464
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nanjing (32.0617°, 118.7778°, elevation 22 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.