Weather in Thailand

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Weather in Thailand
Weather in Thailand

Thailand climate is controlled by tropical monsoons and the weather in Thailand is generally hot and humid across most of the country throughout most of the year. While Thailand’s seasons are generally divided into the hot season, cool season, and rainy season, in reality it’s relatively hot most of the year. The weather in central, northern, and northeastern Thailand is determined by three seasons, whereas the southern, coastal regions of Thailand feature only two, making the weather in Thailand quite easy to understand and plan a trip around.

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Cool Season (November – February)

Cool Season
Cool Season

The weather in Thailand around the central, northern, and northeastern regions is mostly cool and dry between November and February, consequently these are the most popular months to visit Thailand.  Considering its location in the tropics however, the Thailand climate is quite warm most of the year and genuinely “cool” weather really only occurs in the northern mountains, while areas like Bangkok and Ayutthaya receive perhaps only two or three weeks of “cool” weather in late December or early January.
The southern region of Thailand really has only two seasons – “rainy” and dry, not technically experiencing “cool” weather, but featuring glorious sunshine without unbearable heat, beginning in late November and continuing onto April or May.

Hot Season (March – June)

Hot season lasts from March to June
Hot season lasts from March to June

The weather in Thailand classified as the hot season lasts from March to June when higher relative temperatures and occasional rain are the norm.  Around the inland areas, including Bangkok and Ayutthaya, this often means punishing heat and high humidity.  The temperatures in the hot season begin climbing in February and by April the unrelenting heat makes many residents eager for the upcoming rains, which begin sporadically falling around mid-April.  This is traditionally the least popular season for travelers to visit, although the weather in Thailand is still quite nice along Thailand’s coasts.

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Rainy Season (July – October)

The rainy season lasts from July to October
The rainy season lasts from July to October

The rainy season lasts from July to October and is dominated by the southwest monsoon, during which time rainfall in most of Thailand is at its heaviest.  However, like the “cool” season, the name “rainy season” is slightly misleading.  While it certainly does rain during this season it’s more likely to consist of flash-flood afternoon downpours than a continual drizzle for days.  If you can bear the heat and humidity, the weather in Thailand is typically sunny throughout the rainy season, but when the rain comes, it’s fast and furious.