Weather in Thailand in May

May in Thailand is the hard heat. Outdoor plans belong to the ends of the day. The middle is for indoors or water.

A country pin in May is a warning: one region of Thailand will not match another. Use a city page if you already know where you are going. Compared with April and December, May sits in the middle of Thailand's year.

Thailand
Average temp
31°C

27–35°C

Rainfall
221 mm

A wet month

Sunshine
6.4 h

hours per day

What to expect

Daytime

Fierce heat in Thailand in May. Start early. Hide in the middle. Come out again when the sun drops.

This is not a month for a packed walking itinerary. Water, shade, and a schedule that admits the climate is in charge.

Rain

Mixed skies in Thailand in May. Dry days and wet days share the month. Outdoor plans need a backup, not a cancellation policy.

Pack a shell you will actually carry. The monthly table is the place for totals. This is the feel: usable, interrupted.

Evening

Evenings stay warm.

What to pack

  • Sun protection

  • Rain jacket

Where to stay in Thailand

Featured stays on trip1. Dates are a starting point for May.

All hotels in Thailand

Travel guides for Thailand

What to read before you book.

All travel guides in Thailand

Average weather in Thailand

TemperatureRainfall

Source: MeteostatPeriod: 1991-2020Checked: 28 Aug 2026265 places covered

Similar weather in May

Other destinations whose May averages sit close to this one.

Check another month

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FAQs about Thailand

Climate averages for Thailand, 1991–2020.

The best time to visit Thailand is between November and March, the most comfortable stretch of the year on these averages.

April is the hottest month, with an average around 32°C.

September is the wettest month, with about 331 mm of rain.

No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.