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Weather in Thailand in May – is it worth traveling to?

Is the weather pleasant in Thailand? See historical weather data for May to see if it meets your needs.
Check flight prices to Thailand on Avionero:
May

Is the weather good in Thailand in May 2024?

OK Weather
Warm
☁️
Cloudy

For the past few decades, the average daily temperatures in Thailand during May have been around +88°F.

In Thailand the temperature rarely varies more than seven degrees between the different parts with the highest temperature +88°F in Chiang Mai to +82°F in Ko Samui. So you should be able to pack for similar conditions wherever you go in the country.

Temperature, wind and humidity in May

Average
Bangkok
Chiang Mai
Krabi
Phuket
Ko Samui
Trat
☀️
+88°F
Avg. max. temperature
+68°F
Min.
+108°F
Max.
211 mm
Total precipitation
78%
Avg. humidity
2 m/s
Avg. wind
1 ☀️
Sunny Days
12 ⛅️
Cloudy
18 🌦
Rainy
Our opinion: Thailand has OK weather in May.
Thailand in May – what city is the…
  • rainiest? Trat, with an average of 13 mm of rain and humidity of 84%;
  • warmest? Chiang Mai, with daytime temperatures averaging +95°F;
  • windiest? Trat, with an average of 2 m/s;
  • coolest? Ko Samui, with daytime temperatures averaging +82°F;

How good is the weather in Thailand in May?

During May, the Thailand is characterized by variable weather with air pressure around 1008 HPa and therefore elements of sun, rain, and wind – with a little extra emphasis on the latter two. The humidity in May ranges between 67% in Chiang Mai and 84% in Trat.

How warm is it in Thailand during May?

Variable weather with sun, rain and wind: +88°F in average daily temperature.

This is how hot it usually is in May

The average daily temperatures above don't tell you everything about how hot it can be in Thailand. For example, cold nights can make a big difference for those staying in tents or unheated houses. Extra hot days, on the other hand, can make a big difference for those who plan to engage in demanding physical training or competition. So here are some more temperatures for May:
Average
Bangkok
Chiang Mai
Krabi
Phuket
Ko Samui
Trat
  • Average maximum temperature for the month: +88°F;
  • Average minimum temperature for the month: +79°F;
  • Highest monthly temperature: +90°F;
  • Lowest monthly temperature: +79°F;

Monthly temperatures:

Average
Bangkok
Chiang Mai
Krabi
Phuket
Ko Samui
Trat
  • Warmest: March with an average +90°F during the day;
  • Coldest: October with an average +84°F of the day;
  • Hottest month in hottest city: April in Chiang Mai;
  • Coldest month in coolest city: January in Ko Samui;

Winds in Thailand during May

Wind speed in Thailand in May based on historical data:
Average
Bangkok
Chiang Mai
Krabi
Phuket
Ko Samui
Trat

May tends to offer light winds averaging 2 m/s. However, coastal cities may experience breezes during the mornings and afternoons.

Comparison between cities in May:

  • Highest average wind speed: Ko Samui with 3 m/s;
  • Lowest average wind speed: Chiang Mai with 0 m/s;
  • Windiest day of the month: Trat with 3 m/s;
  • The least windy day of the month: Bangkok with 1 m/s;

Humidity and precipitation in Thailand in May

Amount of rainfall in mm during May in Thailand based on historical data:
Average
Bangkok
Chiang Mai
Krabi
Phuket
Ko Samui
Trat
May tends to be an extremely humid month with 76% humidity and 153 mm rainfall. In general the humidity tends to be a little lower in mountainous regions and more humid closer to water.

Comparison between cities in May:

Average
Bangkok
Chiang Mai
Krabi
Phuket
Ko Samui
Trat
  • Highest average rainfall: Trat with 405 mm;
  • Lowest average rainfall: Ko Samui with 117 mm;
  • Most number of rainy days: Trat with 26 rainy days;
  • Least number of rainy days: Chiang Mai with 12 rainy days;
  • Highest risk of rain during the day: Trat with 84%;
  • Least risk of rain during the day: Chiang Mai with 39%;
  • Highest average humidity: Trat with 84%;
  • Lowest average humidity: Chiang Mai with 67%;

Tips for traveling to Thailand in May

Looking for some tips for traveling to the sun, snow, or whatever you're aiming for Thailand? Activities, weather, and clothing are closely linked. In addition, it's important to pack only what you really need so you don't have to worry about heavy packing or paying extra baggage fees.

Here is some advice on what to pack and what kind of activities you can do in the Thailand based on the weather that May is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.

Cloudy, warm weather with light winds and very high humidity in May
Avionero

Pack right for May

The weather makes a difference when it comes to packing - especially which items should go in your suitcase. The tips below are designed to help you pack light and right without carrying more than necessary.
  • Warm - neither hot nor cool, are probably the most comfortable when you think of sunbathing. Shorts, shorter skirts or dresses, tank tops and t-shirts are the basics here. If you're going to a seaside resort, don't forget your swimwear and maybe even a snorkel, mask and flippers.
  • Light winds are probably most comfortable in hot weather but is cooling in cool and cold weather. If it is hot (when the air temperature is about 30 degrees), the wind can have a warming effect. A thin, windproof jacket and long trousers help to counteract these effects.
  • High humidity means that the air conducts heat to and from the skin more easily. For example, if the air is hot (above skin temperature), it will be harder to stay cool. On the other hand, if the air is cool or cold, it is more difficult to stay warm. In high humidity, the choice of clothing makes less of a difference. However, your physical activity plays a bigger role.

FAQ

Frequently asked questions about the weather in Thailand in May:

What can you do outside when it's warm in Thailand?

Bathing and sunbathing can be suitable. Warm (but not hot) days are also good for activities that are not so physically demanding: sightseeing on foot, by boat, on a scooter, camel riding. You can also exercise easily as long as you make sure to cool down and quench thirst.

Is May a good time to visit Thailand?

It’s always a good time to visit Thailand, but the weather is changeable in May, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Monthly weather in Thailand

Source of the data

For this page, we’ve looked at the typical weather in Thailand, based on historical hourly weather data from January 1, 1979, to December 31, 2022.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.