Ko Lanta Weather in September
Ko Lanta in September sees high temperatures, with highs around 30°C (86°F) and overnight lows of 26°C (79°F). With the rainy season in full effect, expect around 327 mm (13 in) of rainfall and regular showers throughout the month.
Rainfall in Ko Lanta in September
As part of the rainy season, Ko Lanta sees around 22 days of rain in September, with an average of 327 mm (13 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Ko Lanta in September
Daytime temperatures in Ko Lanta reach 30°C (86°F) in September, dropping to 26°C (79°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Ko Lanta in September
The city usually sees around 108 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).September in Ko Lanta has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Ko Lanta's climate page.
Ko Lanta Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
72%
Precipitation
327 mm (13 in)
Rainy days
22 days
Humidity
85%
Sunshine
108 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ko Lanta typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Ko Lanta in September
Browse day-by-day weather records for Ko Lanta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ko Lanta historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Ko Lanta.
- The warmest day in September was on September 4, 2013, with a maximum of 35°C (95°F).
- On September 28, 1979, Ko Lanta saw its coldest September day with temperatures maxing out at 25°C (77°F).
- The lowest overnight temperature recorded in September was 18°C (64°F) (September 29, 1993).
- Peak precipitation in September occurred on September 5, 2008, when 224 mm (8.8 in) of precipitation was measured.
Best Places in Thailand in September
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in September →
perfect weather
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What to Wear in Ko Lanta in September
Warm but pleasant conditions in Ko Lanta in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Ko Lanta in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Ko Lanta's climate page.
Temperature Rainfall Sunshine Humidity
See the full Ko Lanta climate overview or explore weather in Thailand.
