Climate Overview
The climate in Wŏnsan is temperate. The average annual temperature is 12°C and approximately 1412mm of precipitation falls per year. Wŏnsan receives a notable amount of rainfall throughout the year, including during its driest month. Wŏnsan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to -5°C. Snowfall occurs from January to December, with around 70cm accumulating over the season.
Temperature
Temperatures in Wŏnsan vary considerably across the year, with a 32°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 27°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -5°C and the daily average is -1°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.
Precipitation
Wŏnsan is a fairly wet location, receiving approximately 1412mm of precipitation annually, which averages out to around 118mm per month. The wettest month is August, averaging 345mm of rainfall. July and September also tend to see above-average precipitation. The driest month is January, with just 30mm. That's 315mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 70cm accumulating over the season. February typically sees the most snow at around 24cm.
Wind
Wŏnsan is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
4 days until Summer
It is currently spring in Wŏnsan, which began on March 20, 2026. Wŏnsan is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 27°C, while the coldest stretch bottoms out in January near -5°C. Summer is next, beginning on June 21, 2026 — 4 days from now.
Spring
Temperatures range from 2 to 19°C. Precipitation is moderate at around 215mm for the season, averaging 72mm per month. Winds are generally light, averaging 4km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 18 to 27°C. Rainfall is heavy, totalling around 743mm across the season with a monthly average of 248mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 4 to 22°C. Rainfall is heavy, totalling around 350mm across the season with a monthly average of 117mm. Expect around 5cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -5 to 3°C. Rainfall is relatively light, with around 103mm over the season and a monthly average of 34mm. Expect around 50cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Wŏnsan based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
