Weather
What is the weather like in Pattaya in May?
Short answer
May in Pattaya averages a high of 32.7 °C and a low of 26.6 °C, with 121.1 mm of rain on about 9 days. By the Thai Meteorological Department's 1991–2020 averages it is one of the six wetter months (number 4 of 12 by rainfall).
- 32.7 °CAverage daily high
- 26.6 °CAverage daily low
- 121.1 mmAverage rainfall for the month
- 9 daysAverage days with 1 mm of rain or more
- 77.5 %Average relative humidity
Checked · 3 sources · How we check
May weather in figures
These are 30-year averages (1991–2020) from the Thai Meteorological Department's Pattaya station, as TMD submitted them to the World Meteorological Organization.1 The station is at about 59 m above sea level, not on the beach.3
| Average daily high | 32.7 °C |
|---|---|
| Average daily low | 26.6 °C |
| Average temperature | 29.4 °C |
| Average rainfall for the month | 121.1 mm |
| Average days with 1 mm of rain or more | 9 days |
| Average relative humidity | 77.5 % |
| Average dew point | 24.9 °C |
Rain in May
Pattaya gets regular rain in May: 121.1 mm on average, spread over about 9 days with at least 1 mm of rain.1 Across the year the station averages 1105.8 mm on 82.2 days.1
Heat and humidity in May
Days average 32.7 °C at their warmest and nights 26.6 °C at their coolest; the monthly mean is 29.4 °C. Average relative humidity is 77.5 % and the dew point 24.9 °C.1
Which season it is
May is the changeover month: the Thai Meteorological Department dates the hot season to mid-May, and the rainy season from mid-May, when the southwest monsoon covers Thailand.2 TMD adds that the start of the rains can come one to two weeks earlier or later than usual.2
What to pack for May
- Light, breathable clothes: the average low is 26.6 °C, so evenings stay warm.1
- A compact umbrella or a light rain jacket: 9 days bring 1 mm of rain or more in an average May.1
- Sun protection and water: the average high is 32.7 °C.1
What to plan around in May
- Keep a rain plan for outdoor days: about 9 of the month's 31 days bring 1 mm of rain or more.1
- Plan the longest time outdoors for the morning or evening: highs average 32.7 °C.1
- Check the forecast close to the date: these are 30-year averages, not a forecast (where to check).
Before you go
Averages describe a typical month, not the week of your trip. Close to the date, check the Thai Meteorological Department's forecast and warnings: where to check the official Pattaya forecast.
Compare the other months: April, June, or the best time to visit Pattaya.
Questions people ask
Does it rain a lot in Pattaya in May?
May averages 121.1 mm of rain on about 9 days, which makes it one of the six wetter months (number 4 of 12 by rainfall) by the Thai Meteorological Department's 1991–2020 averages for Pattaya.
How hot is Pattaya in May?
The average daily high in May is 32.7 °C and the average daily low 26.6 °C, with average relative humidity of 77.5 %.
What season is May in Pattaya?
May is the changeover from the hot season to the rainy season; the Thai Meteorological Department dates the change to mid-May.
Sources
- WMO climate normals 1991–2020, station data sheet for Phatthaya (Pattaya) 48461, as submitted by Thailand, Thai Meteorological Department, archived by NOAA NCEI. Checked 14 October 2026.
- ภูมิอากาศของประเทศไทย (Climate of Thailand), Thai Meteorological Department. Checked 14 October 2026.
- TMD Open Data: station list (Phatthaya, station 48461, 58.93 m above sea level), linked from data.tmd.go.th/api/index1.php, Thai Meteorological Department. Checked 14 October 2026.
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