Basically, the period from December to March is the best time to travel to Thailand. The downside is perhaps the occasional heavy showers, even on the sunniest days. Avoid visiting Thailand during the rainy season from May to October.
The months of April to June and September to October are ideal for visitors seeking a breezy, less crowded environment. While boat services to some smaller islands are suspended during the off-season, hotel prices are generally lower. The weather is particularly hot in April, and there is more rain in September and October.
Wild sunflowers bloom across the hills of Mae Hong Son, northern Thailand, in November and December. Photo: Thai Airways
Bangkok
Bangkok, the bustling capital of Thailand, is a popular tourist destination. The best time to visit Bangkok is from December to January, as the weather is dry, not too hot, and the evenings are quite cool with temperatures potentially dropping to around 20 degrees Celsius.
July and August have occasional rain, but the best part is that the hotel will have many attractive promotions. Avoid April and September – when it's hot and humid.
Night market in Bangkok, Thailand. Photo: iStock
Chiang Mai and Northern Vietnam
Northern Thailand boasts Chiang Mai and the popular town of Pai. The climate here is cooler and more pleasant than in the South. December to February is the best time to visit, with sunny days and cool evenings. Therefore, be sure to pack warm clothing if you plan on hiking or mountain climbing.
Chiang Mai city. Photo: Chris Schalkx
Islands and seas
The most beautiful islands in the Gulf of Thailand, such as Koh Samui, Koh Phangan, and Koh Tao, usually have pleasant weather, even during the rainy season. The ideal time to visit these islands is from January to March. February is the sunniest month and not too hot.
Koh Tao Island, Thailand. Photo: iStock
If you plan to visit islands off the west coast of Thailand and the Andaman Sea such as Phuket, Krabi, Koh Lanta, Koh Phi Phi, etc., consider scheduling your trip for December and January. The weather is sunny and there is little rain.

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