Climate Insights for Jiayuguan

The climate in Jiayuguan is cool. The average annual temperature is 8°C and approximately 148mm of precipitation falls per year. August is the wettest month, receiving around 37mm of rainfall. Jiayuguan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -14°C. Light snow can occur between January and December.

Jiayuguan has a wide annual temperature range, spanning 42°C from the coldest to warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -14°C and the daily average is -9°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.

Jiayuguan is a quite dry location, receiving approximately 148mm of precipitation annually, which averages out to around 12mm per month. The wettest month is August, averaging 37mm of rainfall. July and June also tend to see above-average precipitation. The driest month is November, with just 2mm. That's 35mm 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 25cm annually. January is the snowiest month with approximately 5cm.

Jiayuguan is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, 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 Jiayuguan, which began on June 21, 2026. Jiayuguan 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 July at around 28°C, while the coldest stretch bottoms out in January near -14°C. Autumn is next, beginning on September 23, 2026 — 90 days from now.

The best time to visit Jiayuguan is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 23mm per month. By contrast, January can be quite cold with temperatures dropping to -14°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Jiayuguan 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.