The highest day temperature in May 2025 was 95°F. The lowest night temperature was 79°F. The average values for day and night temperatures during May were 90.4°F и 80.7°F respectivly.

The average sea surface temperature in May 2025 for Surat Thani was 91.2°F. The maximum and minimum values were 90.2°F and 92.8°F respectively.

Most of the days in May are cloudy but you can also expect sunny or gloomy days.

Precipitation total in May for Surat Thani is 6.4 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 5.5 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Surat Thani in May is 7.7 hours.