Climate Insights for Hyesan

The climate in Hyesan is cool. The average annual temperature is 3°C and approximately 913mm of precipitation falls per year. August is the wettest month, receiving around 213mm of rainfall. Hyesan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -23°C. Snowfall occurs from January to December, with around 189cm accumulating over the season.

Hyesan has a wide annual temperature range, spanning 48°C from the coldest to warmest months. July is the warmest month, though highs remain moderate at 25°C with a mean of 20°C. January brings the harshest conditions, with lows dropping to -23°C and an average temperature of -16°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 10°C shift in average temperatures.

Hyesan is a moderately rainy area, receiving approximately 913mm of precipitation annually, which averages out to around 76mm per month. The wettest month is August, averaging 213mm of rainfall. July and May also tend to see above-average precipitation. The driest month is January, with just 16mm. That's 198mm 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 189cm accumulating over the season. February typically sees the most snow at around 36cm.

Hyesan is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 1km/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.

It is currently summer in Hyesan, which began on June 21, 2026. Hyesan 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 July at around 25°C, while the coldest stretch bottoms out in January near -23°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

The best time to visit Hyesan is during June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 99mm per month. By contrast, July can be uncomfortably hot with highs reaching 25°C, while January is the coldest period with lows dropping to -23°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Hyesan 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.