Climate Insights for Xi’an

The climate in Xi’an is temperate. The average annual temperature is 15°C and approximately 859mm of precipitation falls per year. July is the wettest month, receiving around 172mm of rainfall. Xi’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, February, December, when temperatures can drop to -4°C. Snowfall occurs from January to December, with around 51cm accumulating over the season.

Xi’an has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is August, when average highs reach 32°C and the mean temperature sits around 27°C. The coldest month is January, when overnight lows fall to -4°C and the daily average is 0°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 7°C shift in average temperatures.

Xi’an is a moderately rainy area, receiving approximately 859mm of precipitation annually, which averages out to around 72mm per month. The wettest month is July, averaging 172mm of rainfall. June and September also tend to see above-average precipitation. The driest month is January, with just 14mm. That's 158mm 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. Snowfall is a regular feature from January to December, with around 51cm accumulating over the season. November typically sees the most snow at around 17cm.

Xi’an is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, 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 1km/h gap between the calmest and windiest months.

It is currently summer in Xi’an, which began on June 21, 2026. Xi’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 32°C, while the coldest stretch bottoms out in January near -4°C. Autumn is next, beginning on September 23, 2026 — 53 days from now.

The best time to visit Xi’an is during April and May, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 71mm per month. By contrast, August can be uncomfortably hot with highs reaching 32°C, while January is the coldest period with lows dropping to -4°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 Xi’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.