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

Clear/Sunny

27%

Partly Cloudy

25%

Heavy rain

14%

Weather at 12pm
35°C

Partly Cloudy

33%

Moderate rain at times

20%

Heavy rain

10%

Weather at 6pm
32°C

Clear/Sunny

24%

Moderate rain at times

20%

Heavy rain

14%

Weather at 3am
30°C

Moderate rain at times

30%

Partly Cloudy

28%

Clear/Sunny

27%

Heavy rain

10%

More information about the weather in Bangkok in may



Where to go in Thailand in may?

Where to go in Thailand in may: destination map

Thailand: weather map in may in different regions
Thailand: weather map in may in different regions ©whereandwhen.net

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Where to go in each region in may?

Central Thailand
(Bangkok, Hua Hin, Kanchanaburi...)
32°C to 38°C6 à 16 days30°C to 31°C
tolerable weather*
East of Thailand
(Pattaya, Koh Chang, Chanthaburi...)
31°C to 36°C9 à 20 days30°C to 31°C
tolerable weather
Northeastern Thailand (Isan)
(Khon Kaen, Ubon Ratchathani (Isan), Nakhon Ratchasima...)
35°C to 37°C9 à 18 days
tolerable weather*
Northern thailand
(Chiang Mai, Chiang Rai, Pai...)
34°C to 38°C5 à 24 days
tolerable weather*
Phuket
(Phuket town, Patong, Kata Beach...)
30°C to 31°C21 à 22 days31°C
bad weather
Southern Thailand
(Koh Samui, Khao Lak national Park, Krabi - Ao Nang...)
30°C to 34°C11 à 24 days30°C to 31°C
tolerable weather*
*over most of the region. Weather may vary locally.


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
more information about the climate in Bangkok in may

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
more information about the climate in Chanthaburi in may

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
more information about the climate in Chiang Mai in may

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
more information about the climate in Chiang Rai in may

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
more information about the climate in Hua Hin in may


All cities in Thailand in may

Bangkok in maytolerable weather
Chanthaburi in maytolerable weather
Chiang Mai in maytolerable weather
Chiang Rai in maygood weather
Hua Hin in maygood weather
Kanchanaburi in maytolerable weather
Khao Lak national Park in maytolerable weather
Khon Kaen in maygood weather
Koh Chang in maytolerable weather
Koh Lanta in maytolerable weather
Koh Phangan in maytolerable weather
Koh Phi Phi in maybad weather
Koh Samui in maygood weather
Koh Tao in maytolerable weather
Krabi - Ao Nang in maytolerable weather
Nakhon Ratchasima in maygood weather
Pattaya in maytolerable weather
Phuket in maybad weather
Ubon Ratchathani (Isan) in maytolerable weather
Ayutthaya in maytolerable weather
Koh Kut (Koh Kood) in maytolerable weather
See full list of cities (118)


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.


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