Thailand in may: average Weather, Temperature and Climate, Where to go?
Weather in Thailand in may 2025
Below, you have access to the weather forecast for the month of may for most popular cities in Thailand. These predictions are statistics for the month of may from weather reports for over 10 years. The percentage indicates the probability of having the weather indicated.
Average weather in may in Bangkok
tolerable weather UV index: 8
Weather at 6am
30°C
Moderate rain at times
29% of time
27%
25%
14%
Weather at 12pm
35°C
Clear/Sunny
34% of time
33%
20%
10%
Weather at 6pm
32°C
Partly Cloudy
35% of time
24%
20%
14%
Weather at 3am
30°C
30%
28%
27%
10%
Where to go in Thailand in may?
Where to go in Thailand in may: destination map
Where to go in each region in may?
Central Thailand (Bangkok, Hua Hin, Kanchanaburi...) | 32°C to 38°C | 6 à 16 days | 30°C to 31°C | tolerable weather* |
East of Thailand (Pattaya, Koh Chang, Chanthaburi...) | 31°C to 36°C | 9 à 20 days | 30°C to 31°C | tolerable weather |
Northeastern Thailand (Isan) (Khon Kaen, Ubon Ratchathani (Isan), Nakhon Ratchasima...) | 35°C to 37°C | 9 à 18 days | tolerable weather* | |
Northern thailand (Chiang Mai, Chiang Rai, Pai...) | 34°C to 38°C | 5 à 24 days | tolerable weather* | |
Phuket (Phuket town, Patong, Kata Beach...) | 30°C to 31°C | 21 à 22 days | 31°C | bad weather |
Southern Thailand (Koh Samui, Khao Lak national Park, Krabi - Ao Nang...) | 30°C to 34°C | 11 à 24 days | 30°C to 31°C | tolerable weather* |
Where should you go in Thailand in may when it comes to the weather?
Remember:
The climate in Thailand in may ranges from good to bad depending on the region and city.
The climate in Thailand in throughout May marks the beginning of the rainy season, with a sometimes sudden increase in precipitation throughout the country. The thermometer stops its rise of previous months, but the heat coupled with ambient humidity can sometimes be oppressive in non-coastal areas. Tourism slows down and some seaside resorts close until the return of the dry season and its milder weather.
Bangkok and the Center of Thailand in May
Bangkok and the Center of Thailand in May face the true beginning of the wet season. If visiting the capital at this time, expect frequent rains (a fortnight in the month) but a heat that is always present for an average of 30° C in May. Temperatures can warm up to 40° C. The rest of the center observes temperatures that are still very high: 34-35° C and air conditioning is more necessary than ever.
East of Thailand in May
The eastern region does not escape the monsoon, and the northern Gulf coast also receives its own precipitation, up to a fortnight for Koh Chang. As a result, tourism on the island is becoming rarer. Temperatures reach an average of 28° C over the month, allowing for a sea at 30° C, but there are peaks that reach 35° C and more. For less dense showers, prefer Koh Samet and Pattaya.
Northern Thailand in May
Though May be part of the warm season, northern Thailand cools by about 2 degrees for an average temperature of around 28° C (with temperature peaks above 33-34° C). Thanks to regular rain and thunderstorms, the area observes a breathable atmosphere, but hikers will have to wear waterproof clothing if they wish to participate in the month of the Buddha (Chiang Mai).
Northeast Thailand in May
May is the last month of relative drought before the so-called hot and humid season. Count twice as much rain as in April, but expect a very high temperature. The thermometer easily reaches 33-34° C and climbs to 40° C, especially in the province of Udon Thani.
Southeast Thailand in May
The southeast also receives its share of clouds and rain, that are more abundant (double compared to April), with a decreasing duration of sunshine (from 8 hours to 6 hours daily for Koh Samui). On the other hand, temperatures do not drop: the thermometer sails between 26 and 33° C with a sea at 28-30° C. For a less rainy day, prefer beach resorts on the northwest coast of the Gulf of Thailand.
Southwestern Thailand in May
The southwest experiences a notable increase in rainfall and a slight decrease in temperatures throughout May, but the climate remains very hot with an average of 29° C on Koh Lanta and Phuket. Count ten days with showers on Koh Lanta and nearly twenty in Phuket, but the sun remains present. These weather conditions announce the low tourist season and result in the closure of a few resorts; the others offer interesting discounts to maintain their activity. It's a time to enjoy.
Climate in Thailand in may
Climate in Bangkok in may
In the month of may, the mean temperature in Bangkok is 33°C (maximum temperature is 36°C and minimum temperature is 30°C). The climate is burning around this city in this month. With 207mm over 13 days, you will experience some showers throughout your vacations. But this is moderate and it will not be continuous.
With a correct weather, may is okay (but not the best month) for traveling in Bangkok in Thailand.
May | |||
Average temperature | 33°C | ||
Highest temperature | 36°C | ||
Lowest temperature | 30°C | ||
Sea temperature | 29.9°C | ||
Rainfall | 207mm | ||
Number of days with rainfall | 13 day(s) (42%) | ||
Humidity | 73% | ||
Daily sunshine hours | 13 | ||
Cloud cover | 34% | ||
Length of day | 12:45 | ||
Our opinion at whereandwhen.net | tolerable |
Climate in Chanthaburi in may
In may, maximum temperature is 33°C and minimum temperature is 29°C (for an average temperature of 31°C). The climate is very warm in that locality in this month. With 331mm over 17 days, you will experience some showers throughout your holidays. But this is rather reasonably and it is only of temporary showers.
With proper weather, may is okay (but not the best time) for traveling in Chanthaburi in Thailand.
May | |||
Average temperature | 31°C | ||
Highest temperature | 33°C | ||
Lowest temperature | 29°C | ||
Sea temperature | 30.2°C | ||
Rainfall | 331mm | ||
Number of days with rainfall | 17 day(s) (56%) | ||
Humidity | 82% | ||
Daily sunshine hours | 13 | ||
Cloud cover | 37% | ||
Length of day | 12:42 | ||
Our opinion at whereandwhen.net | tolerable |
Climate in Chiang Mai in may
In the month of may, maximum temperature is 37°C and minimum temperature is 27°C (for an average temperature of 32°C). The climate is very warm in that locality in this month. With 122mm over 5 days, you risk getting wet slightly throughout your stay. But this is rather reasonably and it will not be continuous.
With a correct weather, the month of may is okay (but not the best month) for traveling there.
May | |||
Average temperature | 32°C | ||
Highest temperature | 37°C | ||
Lowest temperature | 27°C | ||
Rainfall | 122mm | ||
Number of days with rainfall | 5 day(s) (18%) | ||
Humidity | 75% | ||
Daily sunshine hours | 13 | ||
Cloud cover | 31% | ||
Length of day | 13:01 | ||
Our opinion at whereandwhen.net | tolerable |
Climate in Chiang Rai in may
In may, maximum temperature is 37°C and minimum temperature is 26°C (for an average temperature of 31°C). The climate is burning in this city in may. With 222mm over 10 days, you risk getting wet slightly for your journey. But this is reasonably and it will not be continuous.
With proper weather, may is okay (but not the best time) for traveling there in Thailand.
May | |||
Average temperature | 31°C | ||
Highest temperature | 37°C | ||
Lowest temperature | 26°C | ||
Rainfall | 222mm | ||
Number of days with rainfall | 10 day(s) (32%) | ||
Humidity | 78% | ||
Daily sunshine hours | 13 | ||
Cloud cover | 35% | ||
Length of day | 13:04 | ||
Our opinion at whereandwhen.net | good |
Climate in Hua Hin in may
In the month of may, the mean temperature in Hua Hin is 31°C (maximum temperature is 33°C and minimum temperature is 28°C). The climate is very hot in that area in the month of may. With 161mm over 10 days, you risk getting wet slightly for your holidays. But this is moderate and it will not be continuous.
With an unfavorable weather, may is not recommended month to go there in Thailand.
May | |||
Average temperature | 31°C | ||
Highest temperature | 33°C | ||
Lowest temperature | 28°C | ||
Sea temperature | 30.1°C | ||
Rainfall | 161mm | ||
Number of days with rainfall | 10 day(s) (33%) | ||
Humidity | 78% | ||
Daily sunshine hours | 13 | ||
Cloud cover | 30% | ||
Length of day | 12:42 | ||
Our opinion at whereandwhen.net | good |
All cities in Thailand in may
Bangkok in may | tolerable weather |
Chanthaburi in may | tolerable weather |
Chiang Mai in may | tolerable weather |
Chiang Rai in may | good weather |
Hua Hin in may | good weather |
Kanchanaburi in may | tolerable weather |
Khao Lak national Park in may | tolerable weather |
Khon Kaen in may | good weather |
Koh Chang in may | tolerable weather |
Koh Lanta in may | tolerable weather |
Koh Phangan in may | tolerable weather |
Koh Phi Phi in may | bad weather |
Koh Samui in may | good weather |
Koh Tao in may | tolerable weather |
Krabi - Ao Nang in may | tolerable weather |
Nakhon Ratchasima in may | good weather |
Pattaya in may | tolerable weather |
Phuket in may | bad weather |
Ubon Ratchathani (Isan) in may | tolerable weather |
Ayutthaya in may | tolerable weather |
Koh Kut (Koh Kood) in may | tolerable weather |
Weather data for Thailand in may:
Weather data for Thailand in may is derived from an average of the weather forecast since 2009 in Thailand. There is a margin of error and these forecasts are to be considered as general information only. The weather in Thailand can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Thailand.