Nanjing Temperature by Month
The average annual maximum temperature in Nanjing, China is 27°C (81°F), with daytime highs ranging from 19°C (66°F) in January to 33°C (91°F) in July. This page covers monthly averages, day-night differences, and how Nanjing compares to cities worldwide.
Nanjing Monthly Temperatures
Depending on the time of the year, temperatures range from very warm to pleasant in Nanjing. Nighttime lows follow the same pattern, ranging from 25°C (77°F) to 9°C (48°F).
The chart below illustrates the average maximum day and minimum night temperatures in Nanjing by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. July, the city's warmest month, gets 233 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Nanjing vs China
The map below shows the annual temperature across China. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Nanjing vs World: Temperature Compared
Nanjing's average annual maximum temperature is 27°C (81°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Nanjing?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Nanjing, January is the coolest month, with average highs of 19°C (66°F) and humidity around 74% — considered high. In July, the warmest month, temperatures average 33°C (91°F) with 81% humidity — conditions that feel very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Nanjing's weather — including monthly rainfall, sunshine hours, and humidity — visit our Nanjing climate page.
