Ganghwa Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Ganghwa, 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.
Ganghwa is known for its substantial rain/snowfall, with annual precipitation reaching 1190 mm (47 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Ganghwa shows significant variation throughout the year. Expect 308 mm (12 in) of precipitation during the wettest month July, distributed over 15 rainy days.
In contrast, January offers drier and sunnier days, with around 19 mm (0.7 in) of snow/rainfall over 6 snowy/rainy days.
July, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 161 hours of sunshine in this period. During the driest month January you can expect a temperature of 3°C (37°F). For more detailed insights into the city's temperatures, visit our Ganghwa Temperature page.
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
Ganghwa vs World: Rainfall Compared
Ganghwa's average annual precipitation is 1190 mm (47 in). Let's compare this to some popular worldwide tourist destinations:
New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
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.
Climate change is affecting precipitation patterns worldwide, including Ganghwa:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Ganghwa's weather, including sunshine hours, humidity levels, and temperature data, visit our Ganghwa Climate page.
