Weather in Ko Samui in May 2018

  • 32°C maximum daytime temperature in May in Ko Samui32
    32°C max day temperature
  • 6 hours of sunshine per day (51% of daylight hours) in May in Ko Samui6
    6 hours of sunshine per day
  • 17 days with some rainfall in May in Ko Samui17
    17 days with some rainfall
  • 25°C minimum night-time temperature in May in Ko Samui25
    25°C min night temperature
  • 13 hours of daylight per day in May in Ko Samui13
    13 hours of daylight per day
  • Very high heat & humidity in May in Ko SamuiVH
    Very High heat & humidity
  • 172 mm monthly rainfall in May in Ko Samui172
    172 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Ko Samui11
    11+ (Extreme) UV index
  • 30°C sea temperature in May in Ko Samui30
    30°C sea temperature

Expect 32°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Ko Samui in May. Check more long-term weather averages for Ko Samui in May before you book your next holiday to Thailand in 2018.

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Guide to Ko Samui weather in May

The average maximum daytime temperature in Ko Samui in May is a hot 32°C (90°F) with very high heat & humidity. The average night-time temperature is usually a warm 25°C (77°F). There are usually 6 hours of bright sunshine each day, which represents 51% of the 13 hours of daylight.

Expect 172mm (6.8 inches) of rainfall across the whole of May with 17 days with some rain falling. Maximum UV levels will be extreme (11+ UV index) at midday when the skies are clear.

The average sea temperature in and around Ko Samui in May is 30°C (86°F).

The weather in Ko Samui in May is represented by Ko Samui.

Ko Samui sunrise & sunset times for May 2018

Browse the sunrise & sunset times for Ko Samui in May 2018. Select a month to view Ko Samui sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st May 2018 06:03 18:31
Wednesday, 2nd May 2018 06:03 18:31
Thursday, 3rd May 2018 06:02 18:31
Friday, 4th May 2018 06:02 18:31
Saturday, 5th May 2018 06:02 18:31
Sunday, 6th May 2018 06:01 18:31
Monday, 7th May 2018 06:01 18:32
Tuesday, 8th May 2018 06:01 18:32
Wednesday, 9th May 2018 06:01 18:32
Thursday, 10th May 2018 06:00 18:32
Friday, 11th May 2018 06:00 18:32
Saturday, 12th May 2018 06:00 18:32
Sunday, 13th May 2018 06:00 18:33
Monday, 14th May 2018 06:00 18:33
Tuesday, 15th May 2018 05:59 18:33
Wednesday, 16th May 2018 05:59 18:33
Thursday, 17th May 2018 05:59 18:33
Friday, 18th May 2018 05:59 18:34
Saturday, 19th May 2018 05:59 18:34
Sunday, 20th May 2018 05:59 18:34
Monday, 21st May 2018 05:59 18:34
Tuesday, 22nd May 2018 05:58 18:34
Wednesday, 23rd May 2018 05:58 18:35
Thursday, 24th May 2018 05:58 18:35
Friday, 25th May 2018 05:58 18:35
Saturday, 26th May 2018 05:58 18:35
Sunday, 27th May 2018 05:58 18:36
Monday, 28th May 2018 05:58 18:36
Tuesday, 29th May 2018 05:58 18:36
Wednesday, 30th May 2018 05:58 18:36
Thursday, 31st May 2018 05:58 18:37
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  • Book online with First Choice to receive discount
  • FREE kids places & low deposits also available

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Ko Samui weather by month

Check Ko Samui weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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