Climate Insights for Ya'an

The climate in Ya'an is temperate. The average annual temperature is 13°C and approximately 1766mm of precipitation falls per year. Ya'an receives a notable amount of rainfall throughout the year, including during its driest month. Ya'an 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, December, February, when temperatures can drop to -1°C. Light snow can occur between January and December.

Temperatures in Ya'an vary considerably across the year, with a 26°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 22°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 2°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between November and December, with a 6°C shift in average temperatures.

Ya'an is a fairly wet location, receiving approximately 1766mm of precipitation annually, which averages out to around 147mm per month. The wettest month is August, averaging 311mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 50mm. That's 261mm 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 46cm annually. January is the snowiest month with approximately 18cm.

Ya'an is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently spring in Ya'an, which began on March 20, 2026. Ya'an 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 -1°C. Summer is next, beginning on June 21, 2026 — 87 days from now.

The table below shows monthly climate averages for Ya'an 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.