Bangkok never has a cold month. What changes through the year is the humidity and the rain, and those decide whether a day of walking the old city feels pleasant or punishing.
Bangkok's three seasons
| Season | Months | What it feels like | For a trip |
|---|
|--------|--------|--------------------|------------|
| Cool | November – February | Dry, sunny, warm days, comfortable evenings | The best weather and the most visitors |
|---|---|---|---|
| Hot | March – May | Very hot, humid, little rain until May | Hard for walking; Songkran in April |
| Rainy | June – October | Heavy afternoon storms, humid | Cheaper, quieter, greener |
Month by month
January. The best month for weather: dry, sunny, and as mild as Bangkok gets, with early mornings you might call cool. Busy, especially the first week.
February. Still dry and pleasant, a little warmer each week. Chinese New Year often falls in late January or February and fills Chinatown.
March. The heat arrives. Still mostly dry, but afternoons become hard work outdoors. Plan temples for the morning.
April. The hottest month. Songkran (13–15 April) turns the city into a water fight and is one of the great festivals of Asia; see the Songkran guide. Outside the festival, April is the month to take it slowly.
May. Hot and humid, with the first big storms at the end of the month, which break the heat for an evening at a time.
June. The rainy season begins. Mornings are usually fine; afternoons bring downpours. Prices drop.
July and August. Wet afternoons, dry-ish mornings. School holidays elsewhere bring some families, but it is still quieter than winter.
September. Usually the wettest month. Storms can be long and low-lying streets flood briefly. The best month for hotel deals if you don't mind rearranging plans.
October. Rain easing through the month. Still humid, but a good shoulder month with falling crowds and prices.
November. The season turns: rain fades, and the cool season begins. Loy Krathong falls in November, with candles floated on the river — see the Loy Krathong guide and Bangkok in November.
December. Dry, sunny and comfortable, and the start of peak season. Book rooms early for Christmas and New Year.
Planning around the rain
The rainy season is less of a problem than it sounds, as long as you plan around the pattern:
- Do temples, markets and walking in the morning
- Keep malls, museums, massages and food halls for the afternoon
- Carry a small umbrella; buy one at any 7-Eleven if you forget
- Give yourself slack for traffic — rain makes it worse and taxis harder to find
- Stay near a train station; the BTS and MRT guide explains why
What to pack
- All year: light, breathable clothes; sunscreen; a hat; comfortable sandals
- For temples: something that covers shoulders and knees — the temples guide has the dress code
- For air conditioning: a light layer for malls, cinemas and buses
- Rainy season: a compact umbrella and shoes that can get wet
Bangkok and the rest of Thailand
Bangkok's seasons are close to those of central and northern Thailand, but the islands are different: the Gulf islands (Koh Samui and neighbours) have their heaviest rain later in the year than the Andaman coast (Phuket, Krabi). If you are combining Bangkok with a beach, read the best time to visit Thailand before choosing a month.
Whatever the weather, the city is easier with someone who knows where to go when the sky opens.
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Frequently Asked Questions
What is the best month to visit Bangkok?
December and January are the most comfortable: dry, sunny and the least humid, with evenings that are warm rather than sticky. November and February are nearly as good. These are also the busiest and most expensive months, so book rooms early.What is the hottest month in Bangkok?
April. March to May is the hot season, and April is the peak, with afternoons in the mid-to-high 30s Celsius and humidity that makes it feel hotter. It is also the month of Songkran, the Thai New Year water festival, which is the one reason many people choose to go in April anyway.When is the rainy season in Bangkok?
Roughly June to October, with September usually the wettest month. Rain tends to come as a heavy downpour in the afternoon or evening rather than all day, and mornings are often dry. Streets in low-lying areas can flood briefly after a big storm.Is it worth going to Bangkok in the rainy season?
Yes, if you plan around the afternoon storms. Hotels are cheaper, the big sights are less crowded, and the city is greener. Do outdoor things in the morning, keep museums, malls and massages for the afternoon, and carry a small umbrella.Does it ever get cold in Bangkok?
Not by most visitors' standards. In the coolest weeks of December and January, early mornings can dip into the low 20s Celsius and locals wear jackets, but daytime is still warm. The only real cold you will meet is air conditioning — bring a light layer for malls, cinemas and long bus rides.
