Xian is in a warm temperate zone, and has a continental monsoon climate. The hottest month of the whole year is July. The coldest month here is January. May, September and October are considered the best visiting times. See! Yahoo Weather
Month
Avg. High( °F )
Avg. Low( °F )
Avg. Precip.(in)
January
40.6
24.4
0.30
February
45.9
28.8
0.40
March
57.2
37.8
1.00
April
68.7
48.0
2.00
May
78.4
56.8
2.60
June
88.9
65.8
July
89.6
70.9
3.70
August
88.0
69.4
September
76.5
59.9
4.20
October
66.7
49.6
November
53.8
37.0
December
43.0
26.8
0.20