Ganghwa Weather & Climate: Best Time to Visit

Visitors to Ganghwa can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a very warm 30°C (86°F) in August, the warmest time of the year, to a chilly 3°C (37°F) during cooler months like January.

At night, you can expect temperatures ranging from 23°C (73°F) in August to around -6°C (21°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Ganghwa is known for its substantial rain/snowfall, with annual precipitation reaching 1190 mm (47 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, July it receives heavy rainfall, averaging 308 mm (12 in) of precipitation, recorded across 15 rainy days. In contrast, the driest month January brings less snow/rainfall, with 19 mm (0.7 in) over 6 snowy/rainy days. For more details, please visit our Ganghwa Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

While the amount of sunshine in Ganghwa varies throughout the year, all seasons offer their own charm. Enjoy up to 8.1 hours of daily sun in May, and experience slightly darker atmosphere in July, with about 5.4 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Ganghwa.

The city experiences its highest humidity in July, reaching 82%. In January, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year