Thailand weather in May
Thailand in May averages 31°C (88°F), 221 mm of rain and 6.4 hours of sun a day. It is one of the wetter months of the year here.
Of the twelve months in Thailand, May is the second warmest, the fourth wettest and the sixth dullest.
- Average temp
- 31°C (88°F)
27–35°C · 80–95°F
- Rainfall
- 221 mm
A wet month
- Sunshine
- 6.4 h
hours per day
What is Thailand like in May?
Daytime
Days are hot, often above 32°C.
Rain
Expect frequent rain — this is a wet month.
Evening
Evenings stay warm.
What should I pack for Thailand in May?
High-factor sun cream
With daytime highs around 35°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A proper waterproof, not a folding umbrella
221 mm in the month usually arrives as heavy bursts that an umbrella will not cover.
A dry bag for phone and documents
Worth it for one downpour caught between the taxi and the door.
May compared with April and June
May in Thailand is 0.6°C cooler than April and 129 mm wetter than it, which averages 32°C (89°F).
May in Thailand is 0.6°C warmer than June and 33 mm wetter than it, which averages 30°C (87°F).
Daylight in Thailand in May
On 15 May the sun is up for 12 hours 46 minutes in Thailand, rising about 05:51 and setting about 18:37 local time.
May ends 15 minutes longer than it begins, so the last week of the month is a different length of day from the first.
Travel guides for Thailand
What to read before you book.
Thailand weather by month
TemperatureRainfall
How May compares with the rest of the year
May is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 28°C / 83°F | 18 mm |
| February | 30°C / 85°F | 22 mm |
| March | 31°C / 87°F | 43 mm |
| April | 32°C / 89°F | 92 mm |
| May | 31°C / 88°F | 221 mm |
| June | 30°C / 87°F | 187 mm |
| July | 30°C / 86°F | 184 mm |
| August | 30°C / 85°F | 227 mm |
| September | 29°C / 85°F | 331 mm |
| October | 29°C / 85°F | 276 mm |
| November | 29°C / 84°F | 42 mm |
| December | 28°C / 82°F | 7 mm |
Similar weather in May
Other destinations whose May averages sit close to this one.
Check another month
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FAQs about Thailand in May
May climate averages for Thailand, 1991–2020.
Thailand averages 31°C (88°F) in May, ranging from about 27°C (80°F) at night to 35°C (95°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Yes, a lot. May brings about 221 mm, which makes it one of the wetter months here — expect heavy bursts rather than all-day drizzle.
Yes. May averages 31°C (88°F) against 30°C (87°F) in June — 0.6°C warmer.
May is 0.6°C cooler than April, and 129 mm wetter.
It is outside the easiest window. The most comfortable stretch here is November to March; May sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
About 6.4 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what May is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 46 minutes of daylight in mid-May, against 12 hours 56 minutes in June and 11 hours 19 minutes in December.
On 15 May, sunrise is about 05:51 and sunset about 18:37 local time. Both shift across the month — the month ends 15 minutes longer than it starts.
