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Weather in Сиань: what to expect by season

Photo: Wikimedia Commons, Public domain

Weather overview

Сиань experiences distinct seasons, each bringing its own rhythm to the city. Winters here are dry and chilly, with temperatures often hovering around 0.3 °C in January, the coldest month. Spring arrives gradually, warming Сиань from March onward, though evenings can still feel crisp. Summers are warm and humid, with July and August bringing the highest temperatures and frequent rain. By September, the weather softens, leading into a mild autumn that lingers until late November.

The contrast between seasons in Сиань is noticeable, but none are extreme. The city’s dry periods stretch from late autumn through early spring, while the rainy season peaks in summer. Travelers will find Сиань most comfortable in April, May, September, and October, when temperatures are moderate and rainfall is less persistent.

Temperature

Winter in Сиань is cold but not harsh, with daytime highs reaching 6.1 °C in January and dropping to -2.9 °C at night. By March, the city begins to thaw, with temperatures climbing to 11.1 °C on average. Spring accelerates the warming, and by May, Сиань enjoys pleasant days around 21 °C, though nights can still be cool.

June marks the start of summer, with temperatures rising to 25.7 °C and peaking in July at 27.8 °C. The heat lingers into August, though evenings offer slight relief. Autumn arrives in September, cooling Сиань to a comfortable 21.3 °C, and by November, temperatures drop to 8 °C, signaling the return of winter’s chill.

Average air temperature °C
Average air temperature
Month Minimum Maximum
January -2.9 6.1
February 0.3 9.3
March 6.9 17.4
April 11.8 22.8
May 15.9 27.3
June 20.9 31.1
July 23.6 32
August 23.5 31.8
September 18 25.7
October 11.3 18.2
November 4.9 13.3
December -2.1 6.8

Precipitation

Сиань has a clear wet and dry pattern. The driest months are January and December, with just 3.2 mm and 7.6 mm of rain, respectively. Rainfall increases sharply in April, jumping to 117.3 mm, and remains high through the summer. July and August are the wettest months, with 123.4 mm and 143 mm of precipitation, often bringing short but heavy downpours.

By September, rainfall decreases to 56.7 mm, and the city dries out further in October and November. Travelers visiting Сиань in summer should be prepared for rain, while those coming in winter or early spring will find dry conditions.

Precipitation amount mm
Precipitation amount
Month Precipitation
January 3.2
February 11.9
March 23.2
April 117.3
May 109.1
June 59.9
July 123.4
August 143
September 56.7
October 97.2
November 32.3
December 7.6

What to pack

For winter visits to Сиань, pack warm layers, as temperatures can dip below freezing at night. A coat, gloves, and a scarf will help navigate the chilly January and December days. Spring and autumn require lighter layers, with a mix of long sleeves and light jackets for fluctuating temperatures. April and May mornings can be cool, while afternoons warm up quickly.

Summer in Сиань calls for breathable clothing, as temperatures often exceed 30 °C in July and August. A light rain jacket or umbrella is essential for sudden showers. Comfortable walking shoes are a good idea year-round, especially for exploring the city’s historical sites in any season.

Average monthly wind m/s
Average monthly wind
Month Wind speed
January 1.8
February 1.9
March 2.1
April 2.2
May 2.2
June 2.1
July 2.1
August 2.1
September 1.8
October 1.6
November 1.6
December 1.7