Chaweng Beach in september: average Weather, Temperature and Climate
Weather in Chaweng Beach in september 2025
The weather in Chaweng Beach 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 navigating through 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
39% of time
25%
20%
10%
Weather at 12pm
85°F
Partly Cloudy
37% of time
32%
17%
10%
Weather at 6pm
85°F
Partly Cloudy
38% of time
23%
18%
15%
Weather at 3am
85°F
35%
31%
18%
10%
Evolution of daily average temperature and precipitation in Chaweng Beach in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Chaweng Beach in september.
The climate of Chaweng Beach in september is tolerable
the weather in Chaweng Beach in september is wet (with 7.4in of rainfall over 12 days). Unfortunately, the weather conditions is worsening than the previous month since in august there is an average of 5.9in of precipitation over 9 days.
The climate quite good here september. Temperatures are up to 86°F. The minimum is 83°F. Thus, the mean temperature average in september in Chaweng Beach is 85°F. Note that these seasonal averages are in contrast with those observed in Chaweng Beach in september with a maximum record of 88°F in 2013 and a minimum record of 68°F in 2021. You can plan to have about 8 days with temperatures over 86°F, or 27 of time.
On this month of september, day length in Chaweng Beach is generally 12:11. Sunrise is at 06:09 and sunset is at 18:20.
With a good weather, the month of september is a good month to go there.
Chaweng Beach: another month?
If you can push the dates of your trip to Chaweng Beach forward, the month of october has a better weather forecast than september. more information
Seasonal average climate and temperature of Chaweng Beach in september
Check below seasonal norms These datas are generated from the weather statements earlier years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 86°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 88°F (2013) | ||||
| Lowest record temperature | 68°F (2021) | ||||
| Number of days at +86°F | 8 day(s) (27%) | ||||
| 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 | 7.4in | ||||
| Number of days with rainfall | 12 day(s) (41%) | ||||
| Record daily rainfall | 1.6in (2019) | ||||
| Other climate data | |||||
| Humidity | 78% | ||||
| Visibility | 9.36km | ||||
| Cloud cover | 43% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:09 | ||||
| Time of sunset | 18:20 | ||||
| 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 Chaweng Beach in september 2024:
83°F to 85°F
81°F to 85°F
81°F to 83°F
81°F to 85°F
83°F to 86°F
83°F to 85°F
83°F to 86°F
85°F to 85°F
83°F to 86°F
83°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
83°F to 85°F
81°F to 83°F
81°F to 83°F
83°F to 83°F
83°F to 86°F
83°F to 86°F
83°F to 85°F
81°F to 85°F
79°F to 83°F
83°F to 85°F
81°F to 83°F
81°F to 85°F
83°F to 85°F
83°F to 86°F
Map: other cities on the island of Koh Samui in september
Cities near Chaweng Beach:
| Choeng Mon in september | tolerable weather |
| Bophut in september | tolerable weather |
| Lamai beach in september | tolerable weather |
| Maenam in september | tolerable weather |
| Nathon in september | tolerable weather |
| Lipa Noi in september | tolerable weather |
| Bang Kao (Laem Sor beach) in september | tolerable weather |
| Koh Madsum in september | tolerable weather |
| Koh Taen in september | tolerable weather |
| Koh Phaluai in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Chaweng Beach
perfect weather
good
tolerable
bad
very bad
Weather data for Chaweng Beach in september:
Weather data for Chaweng Beach for september are derived from an average of the weather forecast since 2009 in Chaweng Beach. There is a margin of error and these forecasts are to be considered as general information only. The weather in Chaweng Beach 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 Chaweng Beach.