Climate Insights for Onchon

The climate in Onchon is temperate. The average annual temperature is 12°C and approximately 1089mm of precipitation falls per year. August is the wettest month, receiving around 223mm of rainfall. Onchon 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, December, February, when temperatures can drop to -5°C. Light snow can occur between January and December.

Temperatures in Onchon 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 -3°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 8°C shift in average temperatures.

Onchon is a moderately rainy area, receiving approximately 1089mm of precipitation annually, which averages out to around 91mm per month. The wettest month is August, averaging 223mm of rainfall. July and June also tend to see above-average precipitation. The driest month is January, with just 16mm. That's 207mm 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. Light snowfall can occur between January and December, totalling around 32cm annually. December is the snowiest month with approximately 10cm.

Onchon is mildly breezy, with an average annual wind speed of 16km/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 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 18km/h in winter, 16km/h in spring, 12km/h in summer, 16km/h in autumn.

It is currently autumn in Onchon, which began on September 23, 2026. Onchon 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. Winter is next, beginning on December 21, 2026 (87 days from now).

The table below shows monthly climate averages for Onchon 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.