Located inland, Lanzhou is a typical temperate, semi-arid continental monsoon climate. It is dry with sufficient sunshine. The best season may be from May to October when the temperature is most suitable. See! Yahoo Weather
Month
Avg. High( °F )
Avg. Low( °F )
Avg. Precip.(in)
January
34.7
11.7
0.00
February
41.7
19.0
0.10
March
53.8
31.3
0.40
April
66.6
41.9
0.80
May
75.0
50.7
1.50
June
80.8
56.5
July
84.2
61.2
2.30
August
82.2
59.7
3.00
September
71.6
51.6
1.80
October
61.9
40.5
1.00
November
48.0
27.3
0.20
