Nanjing Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Nanjing, Jiangsu, China. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.

Nanjing has a notably wet climate with abundant precipitation, recording 1277 mm (50 in) of rain/snowfall per year. It does, however, have a distinct rainy season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, June receives substantial rainfall, averaging 230 mm (9.1 in) of precipitation, recorded across 10 rainy days.

In contrast, the driest month, December brings less rainfall, with 36 mm (1.4 in) over 8 rainy days.

June, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 162 hours of sunshine in this period. During the driest month December you can expect a temperature of 11°C (52°F). For more detailed insights into the city's temperatures, visit our Nanjing Temperature page.

Nanjing's average annual precipitation is 1277 mm (50 in). Let's compare this to some popular worldwide tourist destinations:

In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

For more detailed information about Nanjing's weather, including sunshine hours, humidity levels, and temperature data, visit our Nanjing Climate page.