The highest day temperature in July 2025 was 90°F. The lowest night temperature was 84°F. The average values for day and night temperatures during July were 87.6°F и 87.1°F respectivly.

The average sea surface temperature in July 2025 for Koh Lanta was 90.2°F. The maximum and minimum values were 89.4°F and 91.0°F respectively.

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

Precipitation total in July for Koh Lanta is 8.2 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 11.0 mph. It makes July one of the most windy months of the year for Koh Lanta.

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 Koh Lanta in July is 6.8 hours.