Koh Tao in september: average Weather, Temperature and Climate
Weather in Koh Tao in september 2025
The weather in Koh Tao in september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 7
Weather at 6am
83°F
Partly Cloudy
34% of time
31%
18%
14%
Weather at 12pm
85°F
Clear/Sunny
29% of time
27%
26%
16%
Weather at 6pm
85°F
Moderate rain at times
34% of time
27%
20%
17%
Weather at 3am
85°F
34%
34%
14%
14%
Evolution of daily average temperature and precipitation in Koh Tao in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Koh Tao in september.
The climate of Koh Tao in september is tolerable
In september in Koh Tao, the climate is wet (with 10.5in of rainfall over 16 days). The weather's not getting better compared to the previous month since in august there is an average of 8.3in of precipitation over 14 days.
The climate is very warm in that locality in september. Temperatures are up to 85°F. The seasonal minimum is 83°F. Thus, the mean temperature average on this month of september in Koh Tao is 85°F. Note that seasonal normals in contrast with those observed in Koh Tao in the month of september with a maximum record of 88°F in 2013 and a minimum record of 70°F in 2020. You can expect to have 86°F or more throughout the month.
In september in Koh Tao, the days on average last 12:11. The sun rises at 06:10 and sunset is at 18:21.
With proper weather, september is okay (but not the best) to go in this city in Thailand.
September: another location in Thailand?
If you want to go to Thailand in september, there are destinations with better weather than Koh Tao:
In september, Chiang Mai, Doi Inthanon, Chawang, Chumphon, Lamphun and Nakhon Si Thammarat have good weather.
Seasonal average climate and temperature of Koh Tao in september
Check below seasonal norms These datas are compiled from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 85°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 88°F (2013) | ||||
| Lowest record temperature | 70°F (2020) | ||||
| Number of days at +86°F | 5 day(s) (17%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 85°F | ||||
| Lowest sea temperature | 83°F | ||||
| Highest sea temperature | 86°F | ||||
| Wind | |||||
| Wind speed | 22km/h | ||||
| Wind temperature | 83°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 10.5in | ||||
| Number of days with rainfall | 16 day(s) (52%) | ||||
| Record daily rainfall | 2.1in (2012) | ||||
| Other climate data | |||||
| Humidity | 78% | ||||
| Visibility | 9.15km | ||||
| Cloud cover | 45% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:10 | ||||
| Time of sunset | 18:21 | ||||
| Length of day | 12:11 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Koh Tao in september 2024:
83°F to 85°F
81°F to 85°F
81°F to 83°F
83°F to 83°F
83°F to 86°F
83°F to 85°F
85°F to 85°F
83°F to 85°F
83°F to 86°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
81°F to 83°F
83°F to 83°F
83°F to 83°F
83°F to 83°F
83°F to 83°F
81°F to 83°F
83°F to 83°F
83°F to 85°F
83°F to 85°F
83°F to 86°F
83°F to 85°F
77°F to 81°F
83°F to 85°F
83°F to 83°F
81°F to 85°F
83°F to 85°F
83°F to 86°F
Map: other cities in Thailand in september
Cities near Koh Tao:
| Koh Phangan in september | tolerable weather |
| Koh Samui in september | tolerable weather |
| Chumphon in september | good weather |
| Surat Thani in september | tolerable weather |
| Ranong in september | tolerable weather |
| Nakhon Si Thammarat in september | good weather |
| Chawang in september | good weather |
| Prachuap Khiri Khan in september | tolerable weather |
| Khao Sok National Park in september | tolerable weather |
| Khao Lak national Park in september | tolerable weather |
| Krabi - Ao Nang in september | tolerable weather |
| Pran Buri in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Koh Tao
perfect weather
good
tolerable
bad
very bad
Weather data for Koh Tao in september:
Weather data for Koh Tao for september are derived from an average of the weather forecast since 2009 in Koh Tao. There is a margin of error and these forecasts are to be considered as general information only. The weather in Koh Tao can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Koh Tao.