Busan Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Busan, South Korea. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's explore all the details to give you a full picture.
Busan experiences significant rain/snowfall throughout the year, averaging 1367 mm (54 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry and rainy season during certain months. You can clearly see this in our monthly precipitation graphs below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Busan can be quite wet during July, receiving approximately 233 mm (9.2 in) of precipitation over 14 rainy days.
In contrast December, experiences much drier conditions, with 32 mm (1.3 in) of rainfall, spread across 5 rainy days.
July, the wettest month, has a maximum daytime temperature of 28°C (82°F). The city receives 173 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 Busan Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Busan's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Busan spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in South Korea: City Comparison
The map below shows the annual precipitation across South Korea. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Busan vs World: Rainfall Compared
Busan's average annual precipitation is 1367 mm (54 in). Let's compare this to some popular worldwide tourist destinations:
Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.
In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
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.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Busan's weather, including sunshine hours, humidity levels, and temperature data, visit our Busan Climate page.
