http://knows.jongo.com/res/article/2056  
Yearly Climate Info-Hangzhou
Detailed information about the Average, Maximum and Minimum Temperatures and the rainfall in Hangzhou （杭州）
Average Data
Jan
Feb
Mar
Apr
May
June
July
Aug
Sep
Oct
Nov
Dec
Average High (F)
46
48
57
68
77
83
92
91
81
73
62
51
Average High (C)
8
9
14
20
25
29
33
33
28
23
17
11
Average Low (F)
33
35
42
53
62
70
77
76
68
57
47
37
Average Low (C)
1
2
6
12
17
21
25
25
20
14
8
3
Rain (in)
2.6
3.6
4.6
5.1
6.4
8.0
5.2
6.1
7.1
2.9
2.3
2.0
Rain (mm)
67.5
92.5
117.5
132.5
167.5
202.5
132.5
157.5
182.5
72.5
62.5
52.5