Ko Samui
January
Weather in Ko Samui for January 2026
Your guide to Ko Samui weather in January - trends and predictions
In general, the average temperature in Ko Samui at the beginning of January is 27.7 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 27.9 °C by the end of January.
Ko Samui experiences heavy rainfall in January, with over 20 rainy days and an average total precipitation 273.2 mm.
Is January a good time to visit Ko Samui? check out the best time to travel to Ko Samui page.
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Temperatures
Rain 🌧️
More
8
Dry days
23
Rainy days
0
Snow days
28°/23°
Temperatures
20 km/h
Avg max wind
73 %
Avg humidity
Ko Samui Weather January
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  28° | 2 28° | 3 27° | 4 28° | |||
| 5 28° | 6 28° | 7 27° | 8 27° | 9 28° | 10 27° | 11  27° |
| 12 27° | 13 27° | 14 27° | 15  28° | 16 27° | 17 27° | 18 28° |
| 19 28° | 20 27° | 21 27° | 22 27° | 23 27° | 24 27° | 25 28° |
| 26 28° | 27 28° | 28 28° | 29 28° | 30 28° | 31 27° |
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Temperatures trend during January in Ko Samui
See the weather trend as well as the moving average line
January weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Jan. | Patchy rain possible | 28° /25° | 1.8 mm | 6 | |
| 2 Jan. | Patchy rain possible | 28° /25° | 1 mm | 6 | |
| 3 Jan. | Patchy rain possible | 27° /25° | 0.8 mm | 6 | |
| 4 Jan. | Patchy rain possible | 28° /26° | 2.5 mm | 6 | |
| 5 Jan. | Patchy rain possible | 28° /26° | 3.5 mm | 6 | |
| 6 Jan. | Patchy rain possible | 28° /25° | 4.2 mm | 6 | |
| 7 Jan. | Patchy rain possible | 27° /26° | 1.4 mm | 6 | |
| 8 Jan. | Patchy rain possible | 27° /25° | 1.3 mm | 6 | |
| 9 Jan. | Patchy rain possible | 28° /25° | 0.8 mm | 6 | |
| 10 Jan. | Patchy rain possible | 27° /26° | 0.8 mm | 6 | |
| 11 Jan. | Cloudy | 27° /25° | 0.9 mm | 6 | |
| 12 Jan. | Patchy rain possible | 27° /25° | 0.9 mm | 6 | |
| 13 Jan. | Patchy rain possible | 27° /25° | 0.3 mm | 6 | |
| 14 Jan. | Patchy rain possible | 27° /24° | 0.1 mm | 7 | |
| 15 Jan. | Partly cloudy | 28° /25° | 0 mm | 7 | |
| 16 Jan. | Patchy rain possible | 27° /25° | 2.9 mm | 6 | |
| 17 Jan. | Patchy rain possible | 27° /25° | 1.4 mm | 6 | |
| 18 Jan. | Patchy rain possible | 28° /25° | 0.7 mm | 6 | |
| 19 Jan. | Patchy rain possible | 28° /24° | 0.5 mm | 6 | |
| 20 Jan. | Patchy rain possible | 27° /25° | 0.3 mm | 6 | |
| 21 Jan. | Patchy rain possible | 27° /25° | 0.3 mm | 6 | |
| 22 Jan. | Patchy rain possible | 27° /25° | 0.5 mm | 6 | |
| 23 Jan. | Patchy rain possible | 27° /25° | 1.7 mm | 6 | |
| 24 Jan. | Patchy rain possible | 27° /25° | 3.5 mm | 6 | |
| 25 Jan. | Cloudy | 28° /25° | 9.6 mm | 6 | |
| 26 Jan. | Patchy rain possible | 28° /25° | 4.5 mm | 6 | |
| 27 Jan. | Patchy rain possible | 28° /25° | 2.4 mm | 6 | |
| 28 Jan. | Patchy rain possible | 28° /25° | 3.2 mm | 6 | |
| 29 Jan. | Patchy rain possible | 28° /25° | 1.1 mm | 6 | |
| 30 Jan. | Patchy rain possible | 28° /25° | 1.5 mm | 6 | |
| 31 Jan. | Patchy rain possible | 27° /25° | 0.3 mm | 6 | |
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Important Notice
Our weather forecast for Ko Samui in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Ko Samui forecast closer to your planned date for the most up-to-date weather information.
Ko Samui in January - FAQ
What are the expected maximum and minimum temperatures in Ko Samui during January?
During January, expect a variety of temperatures with highs around 28° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ko Samui during January?
Significant rainfall exceeding 273.2 mm is expected in Ko Samui during January, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ko Samui during January?
The average wind speed in Ko Samui during January is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Ko Samui in January?
As you prepare for your trip to Ko Samui in January, 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 January, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
January rainfall patterns in Ko Samui
Explore the daily rainfall trends and prepare for Ko Samuis January weather 💧
UV exposure in Ko Samui during January
Stay informed about UV levels for safe outdoor activities throughout the month of January ☀️
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