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Thailand Weather in September

Thailand weather in September is pretty wet and the rainfall reaches the peak of the year. The temperature decreases to some degree after rain that makes people feel comfortable. Averagely, the high temperature in daytime is 32℃(89.6℉) and the low temperature at night is 24℃(75.2℉).
The hottest cities in Thailand in September:
Pattaya: 33℃(91.4℉); Bangkok: 34℃(93.2℉); Hat yai:32℃(89.6℉)

The coolest city in Thailand in September:

Lampang: 24℃(75.2℉); Khon Kaen: 24℃(75.2℉)


Averages for Thailand Weather in September

High Temperature
32°C (89.6°F)
Low Temperature
24°C (75.2°F)
Rainfall
224 mm (8.8 in)
Sunrise
06:06 ~ 06:07
Sunset
18:08 ~ 18:29



September Temperatures in Thailand


What to Wear
For people wanting to visit Thailand in September 2025, they should take some waterproof clothing and raingears, and breathable fabrics because of damp weather.
 
September Travel Guide – Where to Go & Tips
Tourism Rate: 

Chiang Rai
It has two magnificent temples that must be visited. One is the White Temple representing heaven. Although it was built in 1997, it has a sense of history and the building is so spectacular and white dazzling. Visiting the White Temple, tourists need to walk crossing a bridge, through which the Buddha can deliver them from torment. The other is the Black Temple representing hell, which displays a large number of exhibits about death and hell. The entire Black Temple and its architectural complex form a huge open, garden-style private museum.

Tip: The traffic in Chiang Rai is very inconvenient so you should book a chartered car to travel around.

Chiang Mai
Chiang Mai Old City is the cultural relics left behind by Lanatai Dynasty. It still remains ancient city walls and moats. Visitors can appreciate Wat Phra That, Wat Chedi Luang inside.

In the suburb of Chiang Mai, Maetaeng Elephant Park is a fun site for travel. The dozens of elephants there come to the river to take a bath under the command of trainers; they can play football and even paint. Visitors can sit on the elephant traveling through the jungle, which is so exciting.

Chiang Mai Sunday Walking Street is another great place to go. It is the largest and most lively night market in Chiang Mai. Every Sunday at 4pm, starting from the east gate of the ancient city, it becomes a pedestrian street along 1km range around the Ratchadamnoen Road. The lively scene continues until midnight.

Tip: The national anthem is played at the night market at around 18:00, and at that time the entire market is quiet. Visitors should do as the Romans - do not speak.

Bangkok
As the capital of Thailand, Bangkok has so many interesting places worth visiting. For example, you can go to the Bangkok National Museum. It displays carvings and works of art from


September Weather of Major Thailand Cities
September
Temperature Sunrise / Sunset Humidity
(%)
High Low
Ayutthaya
34°C/ 93.2°F 24°C / 75.2°F 07:25/ 17:32 44
Bangkok
33°C / 91.4°F 25°C / 77°F 07:20/ 18:07 84
Chanthaburi
33°C / 91.4°F 25°C / 77°F 07:56/ 18:38 79
Chiang Mai
32°C / 89.6°F 24°C / 75.2°F 07:45/ 18:30 83
Chiang Rai
32°C / 89.6°F 23°C / 73.4°F 07:08/ 18:13 72
Chonburi
34°C / 93.2°F 25°C / 77°F 07:23/ 18:22 73
Hat yai
33°C / 91.4°F
24°C / 75.2°F 07:41/ 18:34 79
Hua hin
33°C / 91.4°F 26°C / 78.8°F 06:51/ 17:35 75
Khon Kaen
32°C / 89.6°F 24°C / 75.2°F 06:58/ 16:36 72
Ko Samui
32°C / 89.6°F   25°C / 77°F 07:44/ 17:48 57
Lampang
32°C / 89.6°F 24°C / 75.2°F 07:03/ 18:11 74
Nakhon Rathasima
32°C / 89.6°F 24°C / 75.2°F 06:56/ 17:43 65
Nakhon Sawan
33°C / 91.4°F 25°C / 77°F 06:56/ 17:43 65
Nonthabufi
34°C / 93.2°F 25°C / 77°F 06:56/ 17:43 65
Pattaya
33°C / 91.4°F 25°C / 77°F 06:56/ 17:43 65
Phuket
32°C / 89.6°F 25°C / 77°F 06:56/ 17:43 65
Ratchaburi
34°C / 93.2°F 25°C / 77°F 06:56/ 17:43 65
Samut Pakan
34°C / 93.2°F 25°C / 77°F 06:56/ 17:43 65
Songkhla
32°C / 89.6°F 25°C / 77°F 06:56/ 17:43 65
Surat thani
32°C / 89.6°F
25°C / 77°F
06:56/ 17:43
65