September weather forecast and Climate
Phuket, Thailand TH

• The average high temperature in September: 31.5°C

The warmest month (with the highest average high temperature) is March (34°C).
Months with the lowest average high temperature are September and October (31.5°C).

• The average low temperature in September: 24.6°C

The month with the highest average low temperature is April (25.8°C).
The coldest month (with the lowest average low temperature) is December (24.4°C).

• The average humidity in September: 82%

Months with the highest relative humidity are September and October (82%).
The month with the lowest relative humidity is February (69%).

• The average rainfall in September: 361.2mm

The wettest month (with the highest rainfall) is September (361.2mm).
The driest month (with the lowest rainfall) is February (23.9mm).

• The average rainfall days in September: 23 days

The month with the highest number of rainy days is September (23 days).
The month with the lowest number of rainy days is February (3 days).

• The average sea temperature in September: 29°C

Best months for swimming (with the highest average sea temperature) are April, May and June (30°C).
Coldest months (with the lowest average sea temperature) are January, February and December (28°C).

• The average daylight in September: 12h

Months with the longest days are June and July (Average daylight: 13h).
Months with shortest days are January, February, March, April, May, August, September, October, November and December (Average daylight: 12h).

• The average sunshine in September: 4.8h

The month with most sunshine is February (Average sunshine: 9.7h).
The month with least sunshine is June (Average sunshine: 4.7h).

• The average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).