Climate Insights for Iwŏn-ŭp

The climate in Iwŏn-ŭp is temperate. The average annual temperature is 10°C and approximately 959mm of precipitation falls per year. Iwŏn-ŭp receives a notable amount of rainfall throughout the year, including during its driest month. Iwŏn-ŭp is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to -5°C. Snowfall occurs from January to December, with around 120cm accumulating over the season.

Temperatures in Iwŏn-ŭp vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 25°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -5°C and the daily average is -2°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Iwŏn-ŭp is a moderately rainy area, receiving approximately 959mm of precipitation annually, which averages out to around 80mm per month. The wettest month is August, averaging 224mm of rainfall. July and September also tend to see above-average precipitation. The driest month is April, with just 31mm. That's 193mm 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 120cm accumulating over the season. January typically sees the most snow at around 32cm.

Iwŏn-ŭp 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 4km/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 1km/h gap between the calmest and windiest months.

It is currently spring in Iwŏn-ŭp, which began on March 20, 2026. Iwŏn-ŭp 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 25°C, while the coldest stretch bottoms out in January near -5°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Iwŏn-ŭp is during June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 63mm per month. By contrast, August can be uncomfortably hot with highs reaching 25°C, while January is the coldest period with lows dropping to -5°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 Iwŏn-ŭp 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.