Nanjing, Jiangsu Weather by Month and Climate Averages

How much rain does Nanjing get?

Nanjing gets 1194 mm of precipitation in an average year, spread over about 111 days with measurable rain. That is more rainy days than 60% of China.

July is the wettest month, with 233 mm. December is the driest, with 37 mm. August has the most rainy days, about 12.

The longest dry spell in the last five years lasted 44 days, to January 23, 2025.

Nanjing weather by month

Nanjing weather in January

In January, Nanjing averages a high of 7°C and a low of -1°C. It gets 52 mm of precipitation over about 9 rainy days. The sun is out about 44% of daylight hours. The January record high is 21°C (1972) and the record low is -13°C (1977).

Nanjing weather in February

In February, Nanjing averages a high of 10°C and a low of 2°C. It gets 54 mm of precipitation over about 9 rainy days. The sun is out about 37% of daylight hours. The February record high is 28°C (2009) and the record low is -11°C (1990).

Nanjing weather in March

In March, Nanjing averages a high of 15°C and a low of 6°C. It gets 83 mm of precipitation over about 11 rainy days. The sun is out about 37% of daylight hours. The March record high is 31°C (2013) and the record low is -5°C (1988).

Nanjing weather in April

In April, Nanjing averages a high of 21°C and a low of 12°C. It gets 85 mm of precipitation over about 9 rainy days. The sun is out about 34% of daylight hours. The April record high is 34°C (2011) and the record low is 0°C (1995). April is one of the most comfortable months to visit.

Nanjing weather in May

In May, Nanjing averages a high of 27°C and a low of 17°C. It gets 90 mm of precipitation over about 10 rainy days. The sun is out about 33% of daylight hours. The May record high is 38°C (2011) and the record low is 7°C (1983). May is one of the most comfortable months to visit.

Nanjing weather in June

In June, Nanjing averages a high of 29°C and a low of 21°C. It gets 200 mm of precipitation over about 11 rainy days. The sun is out about 27% of daylight hours. The June record high is 38°C (2011) and the record low is 13°C (1981).

Nanjing weather in July

In July, Nanjing averages a high of 32°C and a low of 25°C. It gets 233 mm of precipitation over about 11 rainy days. The sun is out about 22% of daylight hours. The July record high is 39°C (1978) and the record low is 17°C (1976).

Nanjing weather in August

In August, Nanjing averages a high of 32°C and a low of 24°C. It gets 170 mm of precipitation over about 12 rainy days. The sun is out about 39% of daylight hours. The August record high is 40°C (2003) and the record low is 17°C (2009).

Nanjing weather in September

In September, Nanjing averages a high of 28°C and a low of 20°C. It gets 80 mm of precipitation over about 8 rainy days. The sun is out about 44% of daylight hours. The September record high is 38°C (2024) and the record low is 8°C (1972).

Nanjing weather in October

In October, Nanjing averages a high of 23°C and a low of 14°C. It gets 57 mm of precipitation over about 7 rainy days. The sun is out about 46% of daylight hours. The October record high is 34°C (2021) and the record low is 1°C (1978). October is one of the most comfortable months to visit.

Nanjing weather in November

In November, Nanjing averages a high of 17°C and a low of 7°C. It gets 54 mm of precipitation over about 8 rainy days. The sun is out about 55% of daylight hours. The November record high is 29°C (2020) and the record low is -6°C (1979).

Nanjing weather in December

In December, Nanjing averages a high of 10°C and a low of 2°C. It gets 37 mm of precipitation over about 7 rainy days. The sun is out about 58% of daylight hours. The December record high is 22°C (2008) and the record low is -13°C (1991).

Sunshine, humidity and wind in Nanjing

December is the sunniest month in Nanjing, with sunshine about 58% of daylight hours. July is the cloudiest, at 22%. Over the year the sun shines about 40% of daylight hours. Nanjing is cloudier than 65% of China.

Humidity peaks in July at 81% and is lowest in December at 64%.

Nanjing has about 40 days a year above 32°C. Nanjing is hotter than 62% of China.

First and last freeze in Nanjing

The first fall freeze in Nanjing typically comes around November 28, and the last spring freeze around March 7. That leaves a frost-free growing season of about 266 days.

Nanjing weather records

The hottest temperature on record at the Nanjing station is 40°C, on August 6, 2024. The coldest is -13°C, on January 31, 1977.

The wettest day on record brought 235 mm of rain, on June 10, 2017.

44 all-time records have been set at the station since 1970.

The annual mean temperature has changed by +0.4°C per decade since 1970.

The best time to visit Nanjing

The most comfortable time to visit is typically April to May and October, when daytime highs sit near 24°C.

Winter (December–February) is chilly, with average highs around 9°C and lows near 1°C.

Spring (March–May) is warm, with average highs around 21°C and lows near 11°C.

Summer (June–August) is hot, with average highs around 31°C and lows near 24°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 22°C and lows near 14°C.

Nanjing climate questions

How much rain does Nanjing get?

Nanjing gets 1194 mm of precipitation in an average year, over about 111 rainy days.

What is the wettest month in Nanjing?

July is the wettest month in Nanjing, with 233 mm. December is the driest, with 37 mm.

How many rainy days does Nanjing have a year?

Nanjing has about 111 days with measurable rain in an average year. August has the most, about 12.

What is the hottest month in Nanjing?

July is the warmest month in Nanjing, with an average high of 32°C.

What is the coldest month in Nanjing?

January is the coldest month in Nanjing, with an average low of -1°C.

What is the record high temperature in Nanjing?

The record high at the Nanjing station is 40°C, set on August 6, 2024. The record low is -13°C, on January 31, 1977.

What is the sunniest month in Nanjing?

December is the sunniest month in Nanjing, with sunshine about 58% of daylight hours. July is the cloudiest.

When is the first frost in Nanjing?

The first fall freeze in Nanjing typically comes around November 28. The last spring freeze is around March 7.

What is the best time to visit Nanjing?

The most comfortable time to visit is typically April to May and October, when daytime highs sit near 24°C.