Climate Insights for Sunch’ŏn

The climate in Sunch’ŏn is temperate. The average annual temperature is 11°C and approximately 1273mm of precipitation falls per year. July is the wettest month, receiving around 335mm of rainfall. Sunch’ŏn 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 -14°C. Light snow can occur between January and December.

Sunch’ŏn has a wide annual temperature range, spanning 44°C from the coldest to warmest months. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -14°C and the daily average is -8°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 10°C shift in average temperatures.

Sunch’ŏn is a fairly wet location, receiving approximately 1273mm of precipitation annually, which averages out to around 106mm per month. The wettest month is July, averaging 335mm of rainfall. May and June also tend to see above-average precipitation. The driest month is January, with just 8mm. That's 327mm less than July, 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. Light snowfall can occur between January and December, totalling around 45cm annually. December is the snowiest month with approximately 19cm.

Sunch’ŏn 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 February, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Sunch’ŏn, which began on June 21, 2026. Sunch’ŏn 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 30°C, while the coldest stretch bottoms out in January near -14°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Sunch’ŏn is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 65mm per month. By contrast, August can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to -14°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Sunch’ŏn 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.