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Cool Season : (late October to end of February). Average temperature 21 C. and much cooler at night. The coolest months are December and January.
Hot Season : (early March to end of May) Average temperature 29.9 C. The hottest month is April
Rainy Season : (early June to end of October). Average temperature 25.5 C. The wettest month is September.
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Average Conditions for Chiang Mai
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| Month |
Average
Sunlight
(hours) |
Temperature
|
Discomfort
from heat
& humidity
|
Relative
humidity
|
Average Precipitation ( mm )
|
Wet Days (+0.25 mm )
|
| Average |
Record |
| Max |
Min |
Max |
Min |
am
|
pm
|
| Jan |
9
|
13
|
29
|
6
|
36
|
Medium
|
96
|
52
|
0
|
0.5
|
| Feb |
9
|
14
|
32
|
9
|
36
|
Medium
|
93
|
44
|
10
|
1
|
| March |
9
|
17
|
34
|
13
|
39
|
High
|
88
|
40
|
8
|
2
|
| April |
9
|
22
|
36
|
15
|
41
|
High
|
88
|
49
|
36
|
5
|
| May |
8
|
23
|
34
|
19
|
41
|
Extreme
|
90
|
60
|
122
|
12
|
| June |
6
|
23
|
32
|
21
|
38
|
High
|
92
|
67
|
112
|
15
|
| July |
5
|
23
|
31
|
19
|
37
|
High
|
94
|
69
|
213
|
21
|
| Aug |
4
|
23
|
31
|
21
|
37
|
High
|
95
|
73
|
193
|
20
|
| Sept |
6
|
23
|
31
|
18
|
36
|
High
|
96
|
72
|
249
|
17
|
| Oct |
7
|
21
|
31
|
16
|
36
|
High
|
96
|
69
|
94
|
8
|
| Nov |
8
|
19
|
30
|
12
|
37
|
High
|
96
|
63
|
31
|
4
|
| Dec |
9
|
15
|
28
|
6
|
36
|
Medium
|
96
|
57
|
13
|
2
|
|
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