Ko Samui Weather in May
Ko Samui in May
The short of it: Ko Samui in May averages a high of 33 °C (92 °F) and a low of 25 °C (77 °F), with 121 mm (4.8 in) of rain and about 12 h 33 min of daylight. Rated 1 of 5 for a visit; the best months are February and December. Source: TerraClimate climate normals, 1991–2020.
Average high 33° · low 25° · rain 121 mm · daylight 12 h 33 min
✦ Travel with care for a visit · best months: February & December
Thirty years of records give Ko Samui an average May high of 33°, a low of 25° and some 121 mm of rain. No month in Ko Samui runs warmer: highs about 33°. Wet spells are common — about 121 mm, the 4th wettest month.
The sun is up for about 12 h 33 min in mid-May.
For the traveller: pack linen, a wide hat and water, and an oilskin besides. The Almanac rates May 1 of 5 for a visit; the finest months here are February and December.
Against its neighbours, Ko Samui runs cooler than most and drier than most in May. Ko Pha Ngan, 27 km to the NNE, is 1° cooler by day.
May in Ko Samui, by the numbers
- Warmth rank
- 1st warmest of 12
- Rain rank
- 4th wettest of 12
- Versus April
- about the same, 29 mm more rain
- Versus June
- 1° warmer
- Day–night spread
- 8°
- Snow season
- seldom any
- Daylight, mid-month
- 12 h 33 min
- Average wind
- 8 km/h
Neighbouring Towns
May averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| Ko Pha NganSurat Thani | 27 km NNE | 32° | 25° | 124 mm |
| Don SakSurat Thani | 36 km SW | 34° | 25° | 127 mm |
| Koh TaoSurat Thani | 63 km N | 32° | 25° | 118 mm |
| Surat ThaniSurat Thani | 79 km WSW | 34° | 24° | 150 mm |
| ChaiyaSurat Thani | 83 km WSW | 34° | 24° | 143 mm |
| Tha KhamSurat Thani | 91 km WSW | 34° | 24° | 159 mm |
| Ban Na SanSurat Thani | 103 km SW | 34° | 24° | 181 mm |
| Lang SuanChumphon | 104 km WNW | 33° | 24° | 174 mm |