Annual mean 27°C · wettest around September · prevailing wind SW
Warmest
35.1 °C
Coldest
26.7 °C
Wettest
82%
Windiest
1.7 m/s
Prevailing
SW
1.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Chiang Mai over the whole year is 27°C. April is the hottest month, with highs of about 35°C; January is the coldest, with lows of about 17°C. Chiang Mai has no sharply defined rainy season: the chance of rain on a given day runs from 44% in January, the driest month, to 64% in September, the wettest. Winds in Chiang Mai are highest in May, averaging 1.3 m/s (5 km/h), and lightest in January, at 0.7 m/s (3 km/h). The prevailing wind is from the SW. The clearest skies in Chiang Mai come in March, when the sky is typically 25% covered; August is the cloudiest month, at 78%.
Month by month Chiang Mai climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
27°C
17°C
28°C
44%
37%
0.7 m/s
35
73
9
February
30°C
19°C
31°C
54%
29%
1.0 m/s
16
71
4
March
33°C
21°C
35°C
50%
25%
0.9 m/s
3
34
1
April
35°C
24°C
37°C
53%
38%
1.1 m/s
2
13
0
May
33°C
27°C
37°C
63%
58%
1.3 m/s
1
10
0
June
32°C
26°C
36°C
55%
70%
1.3 m/s
1
13
0
July
31°C
25°C
35°C
57%
77%
1.2 m/s
2
15
1
August
30°C
25°C
35°C
61%
78%
1.1 m/s
2
17
1
September
30°C
24°C
35°C
64%
70%
0.9 m/s
2
17
1
October
30°C
24°C
34°C
63%
59%
0.8 m/s
4
25
1
November
30°C
21°C
33°C
50%
43%
0.7 m/s
6
48
2
December
28°C
18°C
29°C
55%
36%
0.7 m/s
28
68
7
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Chiang Mai weather by season
Year round, Chiang Mai has days of about 27°C at their warmest in January, its coolest month, and 35°C in April, its warmest; the coolest hours of the day run from 17°C to 27°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around September and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Chiang Mai weather in winterDecember to February
High 28°CLow 18°CRain 51%
Winter in Chiang Mai has typical daily highs of about 28°C and lows of about 18°C, with a 51% chance of rain on a given day.
Chiang Mai weather in springMarch to May
High 34°CLow 24°CRain 55%
Spring in Chiang Mai has typical daily highs of about 34°C and lows of about 24°C, with a 55% chance of rain on a given day.
Chiang Mai weather in summerJune to August
High 31°CLow 25°CRain 58%
Summer in Chiang Mai has typical daily highs of about 31°C and lows of about 25°C, with a 58% chance of rain on a given day.
Chiang Mai weather in autumnSeptember to November
High 30°CLow 23°CRain 59%
Autumn in Chiang Mai has typical daily highs of about 30°C and lows of about 23°C, with a 59% chance of rain on a given day.
When is the rainy season in Chiang Mai?
Chiang Mai has no sharply defined rainy season: the chance of rain on a given day runs from 44% in January, the driest month, to 64% in September, the wettest.
What time of year is Chiang Mai windiest?
Winds in Chiang Mai are highest in May, averaging 1.3 m/s (5 km/h), and lightest in January, at 0.7 m/s (3 km/h). The prevailing wind is from the SW.
What is the average temperature in Chiang Mai year round?
The average temperature in Chiang Mai over the whole year is 27°C. April is the hottest month, with highs of about 35°C; January is the coldest, with lows of about 17°C.