Temperature
Hot by day, warm at night.
93°Ftypical May high
Typical range
May climate
May in Ko Samui
Thailand · Southeast Asia
Hot days and some sun. Humid air is the main drawback.
Some tradeoffs
Mid to late
Daytime high
93°F
Lows around 80°F
Rain
Rain most days
Sun
6 h/day
Air feel
Very humid
Sea temp
87°F
Very warm sea
When to visit
Month-by-month fit
Best
Precipitation
It rains on most days. About 21 wet days this month.
68%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
6.2 hMay sunshine
Heat & humidity by month
Very hot days with very humid air.
100%May Heat feel
Easy airWarm airHumid air
Hourly temperature pattern
In May, afternoons feel about 90° and nights feel near 88°.
WarmHotNight hours
Clear sky
Mostly cloudy skies this month.
22%May Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in May.
9 mphMay Light breeze
Sea temperature
87°FMay sea temp
More detailIncludes daypart comfort
Typical May day
May stays around 84°F through the day and night, with little temperature relief.
Avg temp Typical range
Morning83°F
Feels 89°F
Rain28%
Cloud81%
Humid airVery high
Sun intensityModerate
Midday84°F
Feels 90°F
Rain24%
Cloud78%
Humid airVery high
Sun intensityStrong
Late afternoon84°F
Feels 90°F
Rain27%
Cloud76%
Humid airVery high
Sun intensityModerate
Early evening84°F
Feels 89°F
Rain35%
Cloud79%
Humid airVery high
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 85 | 77 | 5.0 | 10 | 6.4 | 78 | 83 |
| Feb | 85 | 78 | 2.5 | 5 | 7.6 | 78 | 83 |
| Mar | 87 | 79 | 4.6 | 9 | 7.7 | 79 | 85 |
| Apr | 90 | 80 | 3.3 | 11 | 6.7 | 79 | 86 |
| May | 93 | 80 | 5.2 | 21 | 6.2 | 79 | 87 |
| Jun | 93 | 79 | 5.3 | 21 | 5.0 | 78 | 86 |
| Jul | 92 | 78 | 4.6 | 21 | 5.0 | 79 | 85 |
| Aug | 92 | 78 | 4.0 | 18 | 4.9 | 79 | 85 |
| Sep | 90 | 78 | 4.6 | 23 | 4.8 | 81 | 85 |
| Oct | 89 | 77 | 11.6 | 28 | 4.7 | 82 | 85 |
| Nov | 86 | 76 | 17.5 | 21 | 5.8 | 82 | 84 |
| Dec | 85 | 76 | 10.4 | 14 | 5.7 | 78 | 83 |
Similar climates
Similar
Similar travel styleNosaraCosta RicaSimilar travel styleSanta TeresaCosta RicaSimilar travel styleNegrilJamaicaSimilar travel styleBaliIndonesia
Want a side-by-side climate view? Compare Ko Samui with Nosara.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 28, 2026
Data & methodology