All 4 regions in Thailand, according to September weather, are experiencing the rainy season. There is just one region in September in Thailand experiencing the tourist season and this is Thailand - North coast.

The lowest day temperature in Thailand in September can be found in South Thailand, where the value of day temperature is 30.6 °C (87.1 °F). The highest day temperature in September in Thailand can be found in Thailand - North coast, where the value of day temperature is 31.9 °C (89.5 °F).

The lowest night temperature in Thailand in September can be found in North Thailand, where the value of night temperature is 22.3 °C (72.1 °F). The highest night temperature in September in Thailand can be found in Thailand - North coast, where the value of night temperature is 24.5 °C (76.2 °F).

The lowest value of the sea temperature in Thailand in September can be seen in South Thailand with a value of 29.1 °C (84.3 °F). In Thailand in September - the region with the highest sea temperature is Thailand - North coast. The value in this region is 29.3 °C (84.7 °F).

The number of rainy days in Thailand in September is the lowest in Thailand - North coast - its value is 20 days. The highest value of the number of rainy days in September in Thailand can be seen in South Thailand with a value of 23 days.

In Thailand in September - the region with the lowest rainfall amount is Southeast Thailand. The value in this region is 137 mm (5.41 in). The highest value of the rainfall amount in Thailand in September can be seen in South Thailand with a value of 375 mm (14.78 in).

In September in Thailand - the region with the lowest wind speed is North Thailand. The value in this region is 1.0. In Thailand in September - the region with the highest wind speed is Southeast Thailand. The value in this region is 1.9.

The humidity in Thailand in September is the lowest in Southeast Thailand - its value is 79 %. The highest value of the humidity in Thailand in September can be seen in South Thailand with a value of 84 %.

In September in Thailand - the region with the lowest number of sun hours (without clouds) is Thailand - North coast. The value in this region is 5 hours. The highest number of sun hours (without clouds) in September in Thailand can be found in Southeast Thailand, where the value of number of sun hours (without clouds) is 6 hours.

The lowest clear sky percentage in Thailand in September can be found in Thailand - North coast, where the value of clear sky percentage is 42 %. The highest clear sky percentage in September in Thailand can be found in Southeast Thailand, where the value of clear sky percentage is 46 %.

The lowest value of the day length in September in Thailand can be seen in South Thailand with a value of 12 hours. The day length in Thailand in September is the highest in North Thailand - its value is 12 hours.