The weather in Thailand month by month
The weather in Thailand in January
The month of January is in the middle of what we call winter. It is a month during which the rainy season is over everywhere in the country. But, note that sometimes, the Gulf of Thailand is still quite rainy until mid-January. You can enjoy blue skies and warm weather with no scorching temperatures. It is therefore, meteorologically speaking, a very good time of the year to visit Thailand.
The weather in Thailand in February
February is also in winter. There is no more possible monsoon hanging over the Gulf of Thailand. It's sunny everywhere! Beautiful sunny weather with very little rain. It is this absence of rain which does not wash the sky of fine particles caused by the very numerous burnings which explains the high PM 2.5 pollution levels.
The weather in Thailand in March
March marks the start of the summer in Thailand, the hottest time of the year. It is also the hottest month in the Center and Northenr part of the country. With temperatures regularly exceeding 40°C during the hours when the sun is at its peak (10 a.m. to 4 p.m.). In the South, the heat is more bearable. Especially by the sea. Swimming pools in hotels are particularly welcome!
The weather in Thailand in April
April is also a very hot month in Thailand. Similar to March, especially the first fortnight. Around mid-April, at the time of Songkran, the Thai New Year also nicknamedthe Water Festival, the weather is supposed to change and the rainy season to begin timidly. This is the period when nature is the most dry, especially in the North and Center regions. Not the best time for enjoying lush nature and some xaterfalls have little or no water.
The weather in Thailand in May
It is in May that the rainy season really begins. It is not the rainiest month of the year. The rainfals are generally very occasional but can be very heavy, before leaving the beautiful weather coming back quite quick. Until the next big downpour.
The weather in Thailand in June
June is a month when rainy season intensify. It is not yet too much, especially at the beginning of the month, but the showers are almost daily. They are generally furtive and intense but there is a short big downpour almost every day. Often in the middle or end of the afternoon. And after the storms, most of the time a very pleasant cloudy weather comes. The North and Central plains are less rainy than the Southern Thailand. June is a not a bad month to visit the countryside and discover nature. Even if the closure of some national parks which begins in mid-May with Similan and Surin islands, continues.
The weather in Thailand in July
July, the monsoon begins is more intense. Rain is more common and can sometimes last longer. But it is far from raining all the time!
You can still enjoy many passages of blue sky. This is the beginning of the most interesting period to visit the North of Thailand. It is generally at the beginning of July that the rice is replanted, particularly in the rice terraces of Ban Pa Pong Piang
in Chiang Mai province. The Gulf of Thailand benefits a good weather because the monsoon arrives there a little later (November and December are the most rainy months in this area). On the other hand, in the South of Thailand, we are starting to really have to deal with showers and rainy days. This does not prevent you from visiting the South but you have to adapt and be ready to face torrential rains and sometimes a few days of almost continuous rain. Be careful, the sea can be dangerous, respect the flags when they are on the beaches. Every year several tourists die from drowning in Phuket in July & August.
The weather in Thailand in August
August, the monsoon intensifies again, especially towards the end of the month. If you plan to visit the South of the country, you must be ready to adapt and perhaps face a few days of mostly rainy weather. Especially in the Andaman Sea area (Phuket, Krabi, Trang). The islands in the Gulf of Thailand still benefit from a good weather and remain to be favored. North experiences longer and more intense rainy episodes but still has calm periods which allow you to take advantage of nature which loves this weather alternating rain and sun.
The weather in Thailand in September
September is clearly the month with the worst weather in Thailand. It is the one where the monsoon is the most intense with sometimes several consecutive days of rain with little respite. It is also the month which generally experiences the most flooding. The South is the wettest while in the rest of the country, it is more unpredictable. I do not recommend planning your vacation in Thailand in September unless you have no choice. And avoid to book everything in advance and leave room in your organization for improvising depending on the weather.
The weather in Thailand in October
October is the last month of the rainy season in Thailand in most of the country (except for the Gulf of Thailand area where rainy season's peak is in November and December). Weather is a bit less rainy in general than September but it remains a very wet month almost everywhere in Thailand.
The weather in Thailand in November
In November, we are leaving the rainy season behind us in almost the entire country (except for the Gulf of Thailand area where it is the peak of the monsoon until end of December). The rest of the country is entering winter. The temperatures are cooling but remain warm as we are in Thailand! It is the month of the rice harvest in the North and the North-East. The high tourist season starts in mid-November with a nature resplendent after being watered for months, waterfalls at thei maximum flow and beautiful weather. It is one of the best months to visit Thailand (except the Koh Samui, Koh Phangan and Koh Tao).
The weather in Thailand in December
In December, rains become very rare (except for the Gulf of Thailand area where this is still the peak of the monsoon). Temperatures cool down a little again, especially in the North with sometimes thermometer flirting with zero, particularly at the summit of Doi Inthanon, the highest peak in the country. But in the plains, temperatures generally stay between 20 and 32°C.