Koh Yao Noi Weather in September

With daytime temperatures of 30°C (86°F) and nighttime lows of 26°C (79°F), September in Koh Yao Noi brings high temperatures during the day. It is also the wettest month of the year, so pack an umbrella.

Rainfall in Koh Yao Noi in September

Koh Yao Noi is in the rainy season in September, with rain on around 23 days and an average of 317 mm (12 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Koh Yao Noi in September

In September, Koh Yao Noi sees high temperatures, with highs of 30°C (86°F). Nights drop to around 26°C (79°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are warm at 26°C (79°F). It's worth making sure your accommodation has decent ventilation or air conditioning.

Sunshine in Koh Yao Noi in September

This month is characterized by fewer sunny days, with about 0 hours of sunshine. It's great for those who appreciate cooler, less sunny days.

Average water temperature in September

The water sits at 0°C (32°F) this month, which is well below what most people consider swimmable. Wetsuits help, but expect it to still feel cold.

September in Koh Yao Noi 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.

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For a detailed overview over the year and the best time to visit Thailand, check out our Koh Yao Noi's climate page.

Koh Yao Noi Temperature in September

Min Temperature 26°C (79°F)  

Max Temperature 30°C (86°F)  

Water Temperature 0°C (32°F) *  

Chance of Rain 75%  

Precipitation 317 mm (12 in)  

Rainy days 23 days  

Sunshine 0 hours *  

Percentage Sunshine *  

* Data from: Ao Phang Nga Marine national park, Thailand (18 KM, 11 Miles).

What to Wear in Koh Yao Noi in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. The water temperature sits at about 0°C (32°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. With limited sunshine expected, sunglasses aren't a priority for packing.

What To Do in Koh Yao Noi in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Thailand, check out our Koh Yao Noi's climate page.

More climate data for Koh Yao Noi

Temperature Rainfall Sunshine Water Temp

See the full Koh Yao Noi climate overview or explore weather in Thailand.