Koh Yao Yai in september: average Weather, Temperature and Climate
Weather in Koh Yao Yai in september 2025
The weather in Koh Yao Yai in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by using 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
31% of time
28%
25%
12%
Weather at 12pm
85°F
Moderate rain at times
29% of time
26%
22%
21%
Weather at 6pm
83°F
Moderate rain at times
36% of time
24%
23%
14%
Weather at 3am
83°F
38%
27%
19%
11%
Evolution of daily average temperature and precipitation in Koh Yao Yai in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Koh Yao Yai in september.
The climate of Koh Yao Yai in september is tolerable
In september in Koh Yao Yai, the climate is wet (with 15.7in of precipitation over 17 days). It should be noted an improvement from the previous month since in august it receives an average of 16.6in of rainfall over 18 days.
The climate quite enjoyable here this month. The high seasonal norm is 85°F. The minimum is 83°F. Thus, the mean temperature average on this month of september in Koh Yao Yai is 83°F. Note that seasonal normals in contrast with those observed in Koh Yao Yai in the month of september with a maximum record of 90°F in 2021 and a minimum record of 76°F in 2020. You You can hope to have about 4 days with temperatures above 86°F, or 13 of the month.
On average, in Koh Yao Yai, the days of september last 12:10. Sunrise is at 06:16 and sets at 18:26.
With a correct climate, september is okay (but not good) to go in that area.
September: another location in Thailand?
If you want to go to Thailand in september, there are destinations with better weather than Koh Yao Yai:
In september, Chiang Mai, Doi Inthanon, Chawang, Chumphon, Lamphun and Nakhon Si Thammarat have good weather.
Seasonal average climate and temperature of Koh Yao Yai in september
Check below seasonal norms These datas are compiled from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 83°F | ||||
| Highest temperature | 85°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 90°F (2021) | ||||
| Lowest record temperature | 76°F (2020) | ||||
| Number of days at +86°F | 4 day(s) (13%) | ||||
| 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 | 21km/h | ||||
| Wind temperature | 83°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 15.7in | ||||
| Number of days with rainfall | 17 day(s) (58%) | ||||
| Record daily rainfall | 3.7in (2012) | ||||
| Other climate data | |||||
| Humidity | 80% | ||||
| Visibility | 8.93km | ||||
| Cloud cover | 45% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:16 | ||||
| Time of sunset | 18:26 | ||||
| Length of day | 12:10 | ||||
| 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 Yao Yai in september 2024:
83°F to 85°F
83°F to 85°F
79°F to 83°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
81°F to 85°F
81°F to 83°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
81°F to 83°F
81°F to 83°F
83°F to 85°F
81°F to 83°F
81°F to 83°F
81°F to 83°F
81°F to 83°F
81°F to 83°F
83°F to 83°F
83°F to 83°F
81°F to 83°F
81°F to 83°F
81°F to 83°F
81°F to 85°F
81°F to 83°F
81°F to 83°F
83°F to 83°F
83°F to 85°F
Map: other cities in Thailand in september
Cities near Koh Yao Yai:
| Koh Yao Noi in september | tolerable weather |
| Phuket in september | tolerable weather |
| Ton Sai beach (Ao Nang) in september | tolerable weather |
| Railay beach in september | tolerable weather |
| Krabi - Ao Nang in september | tolerable weather |
| Koh Phi Phi in september | very bad weather |
| Koh Lanta in september | tolerable weather |
| Khao Lak national Park in september | tolerable weather |
| Koh Muk (Ko Mook) in september | tolerable weather |
| Khao Sok National Park in september | tolerable weather |
| Chawang in september | good weather |
| Koh Libong in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Koh Yao Yai
perfect weather
good
tolerable
bad
very bad
Weather data for Koh Yao Yai in september:
Weather data for Koh Yao Yai for september are derived from an average of the weather forecast since 2009 in Koh Yao Yai. There is a margin of error and these forecasts are to be considered as general information only. The weather in Koh Yao Yai 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 Yao Yai.