one might expect, because of the somewhat higher elevations,
the climate in the far northern province of Chiang Mai can
vary quite considerably when compared to the rest of the country.
Many visitors to the kingdom actually prefer the more moderate
cooler weather that this beautiful northern province offers.
Like the rest of the country, however, there are in fact three
distinct seasons; the hot season, the rainy season and the
There is no significant variation between day and night time
temperatures in Chiang Mai - except perhaps during the winter
months and in the mountainous areas. The monsoon season in
Chiang Mai begins around May and ends in October - earlier
than in central Thailand. The rain generally falls sporadically
- except during August and September when the streets of Chiang
Mai can sometimes flood.
Hot Season really begins at the end of March and lasts until
the end of May, with temperatures ranging between 17°
C and 36° C. Average daytime temperature is around 29.9°
C. The hottest month is April.
Rainy Season that follows starts in early June and can last
until the end of October. Average daytime temperature is 25.5°
C. The wettest month is normally September.
Cool Season lasts from late October until the end of February
with temperatures ranging from 13° C to 28° C. Average
daytime temperature is 21° C, but cooler at night - especially
in the hills and mountains. The coldest months are December
rainfall (1997) - 908.6 mm
Number of days rain (1997) - 105 days
Mean temperature (1997) - 25.5° Celsius
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