Weather in Ko Samui for September 2027
In general, the average temperature in Ko Samui at the beginning of September is 28.7 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 28.5 °C by the end of September.
Ko Samui experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 164.8 mm.
Is September a good time to visit Ko Samui? check out the best time to travel to Ko Samui page.
✨ Is September a good time to visit Ko Samui? – Ask the AI Weatherman
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Ko Samui Weather September
Temperatures trend during September in Ko Samui
September weather in Ko Samui day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate or heavy rain shower | 29° /27° | 8.1 mm | 5 | |
| 2 Sept. |  Light rain | 29° /27° | 3.3 mm | 6 | |
| 3 Sept. | Light rain | 29° /26° | 4.8 mm | 6 | |
| 4 Sept. | Light rain | 29° /27° | 3.4 mm | 5 | |
| 5 Sept. | Light rain | 29° /26° | 9 mm | 6 | |
| 6 Sept. | Light rain | 29° /27° | 5.2 mm | 6 | |
| 7 Sept. |  Heavy rain at times | 29° /26° | 6.3 mm | 6 | |
| 8 Sept. | Light rain | 29° /27° | 3.2 mm | 6 | |
| 9 Sept. | Moderate or heavy rain shower | 29° /27° | 5.8 mm | 6 | |
| 10 Sept. | Light rain | 29° /27° | 5.4 mm | 5 | |
| 11 Sept. | Light rain | 28° /27° | 3.4 mm | 6 | |
| 12 Sept. | Light rain | 28° /27° | 2.6 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 28° /26° | 9.4 mm | 6 | |
| 14 Sept. | Moderate or heavy rain shower | 28° /27° | 9.9 mm | 5 | |
| 15 Sept. | Moderate or heavy rain shower | 28° /27° | 6.4 mm | 6 | |
| 16 Sept. | Light rain | 29° /27° | 5.2 mm | 6 | |
| 17 Sept. |  Patchy rain possible | 29° /27° | 2.2 mm | 6 | |
| 18 Sept. | Light rain | 29° /27° | 3.7 mm | 6 | |
| 19 Sept. | Light rain | 29° /27° | 3.6 mm | 6 | |
| 20 Sept. | Light rain | 29° /27° | 4.1 mm | 6 | |
| 21 Sept. | Moderate or heavy rain shower | 29° /27° | 6 mm | 6 | |
| 22 Sept. | Moderate or heavy rain shower | 29° /27° | 5.4 mm | 6 | |
| 23 Sept. | Moderate or heavy rain shower | 29° /27° | 6.5 mm | 6 | |
| 24 Sept. | Moderate or heavy rain shower | 29° /27° | 6.5 mm | 6 | |
| 25 Sept. | Moderate or heavy rain shower | 29° /27° | 5.5 mm | 6 | |
| 26 Sept. | Moderate or heavy rain shower | 28° /27° | 7.3 mm | 6 | |
| 27 Sept. | Light rain | 28° /27° | 4.6 mm | 5 | |
| 28 Sept. | Moderate or heavy rain shower | 29° /26° | 5.8 mm | 6 | |
| 29 Sept. | Moderate or heavy rain shower | 29° /27° | 7.3 mm | 6 | |
| 30 Sept. | Light rain | 29° /27° | 5 mm | 6 | |
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Ko Samui weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 29°/27° | 29°/27° | 28°/27° |
| Rainfall | 124 mm | 165 mm | 293 mm |
| Wind | 23.7 km/h | 25.7 km/h | 18.5 km/h |
| Humidity | 73% | 74% | 75% |
| Rainy days | 24 days | 23 days | 27 days |
| Dry days | 7 days | 7 days | 4 days |
Planning a trip to Ko Samui? Discover the best time to visit
Ko Samui in September - FAQ
What are the expected maximum and minimum temperatures in Ko Samui during September?
How much rainfall should be expected in Ko Samui during September?
What are the typical wind conditions in Ko Samui during September?
September rainfall patterns in Ko Samui
UV exposure in Ko Samui during September
What to pack to Ko Samui in September?
Warm & sunny · highs around 29 °C, frequent showers
As you prepare for your trip to Ko Samui in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Ko Samui, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
🧴 Personal Items
Where is Ko Samui?Get accurate weather forecasts for Ko Samui, located at latitude 9.536 and longitude 99.936. Stay updated with localized weather information tailored for Ko Samui.