Select units of measurement for the temperature and rainfall tables (metric or imperial).
In September, the climate in Thailand is
hot, muggy and rainy. We are in the period of the
southwest monsoon.
Temperatures are high everywhere. In the inland areas of the central-north, when it does not rain, the temperature can exceed 35 °C (95 °F).
As for the
rains, overall, September in Thailand is the rainiest month of the year. However, there are relatively sheltered areas, namely the north-eastern side of peninsular Thailand (see Koh Samui, Nakhon Si Thammarat, Songkhla). Instead, rainfall is particularly abundant, not only in the areas at the foot of the mountains, but also on the coasts exposed to the south-west: on the southwestern side of peninsular Thailand (see Phuket, Krabi, Phi Phi Islands), and even more so in the coastal stretch south-east of Pattaya (see Chanthaburi, Trat, Koh Chang).
September is the month in which a
typhoon from the Pacific is most likely to arrive. Typhoons, however, generally affect the continental part of Thailand, reaching it after having discharged the bulk of their energy on Vietnam, Laos and Cambodia.
The
sea in Thailand is always pleasantly warm for swimming. However, during the southwest monsoon period, the Andaman Sea (therefore on the southwestern side of peninsular Thailand) can be rough.
During the month, the
day length gradually decreases, although only slightly, since Thailand is a tropical country. On September 22, the autumn equinox, the day is 12 hours long all over the world.
The following tables show the climate averages in the month of
September in
Thailand in a selection of locations.
Monthly climate averages - September
(from north to south)
Chiang Rai
(395 m.) |
|---|
Chiang Rai, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 23 | 31 | 275 | 15 | 81% | 5,4h | 12.2h |
Chiang Mai
(300 m.) |
|---|
Chiang Mai, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 23 | 32 | 200 | 17 | 80% | 4,8h | 12.2h |
Lampang
(240 m.) |
|---|
Lampang, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 33 | 210 | 18 | 81% | 4,8h | 12.2h |
| Udon Thani |
|---|
Udon Thani, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 32 | 250 | 14 | 79% | 4,8h | 12.2h |
| Sakon Nakhon |
|---|
Sakon Nakhon, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 32 | 235 | 14 | 82% | 5,6h | 12.2h |
| Phitsanulok |
|---|
Phitsanulok, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 25 | 33 | 270 | 15 | 79% | 3,6h | 12.2h |
| Khon Kaen |
|---|
Khon Kaen, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 32 | 245 | 15 | 82% | 4,8h | 12.2h |
| Nakhon Sawan |
|---|
Nakhon Sawan, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 25 | 33 | 235 | 15 | 82% | 3,6h | 12.2h |
| Ubon Ratchathani |
|---|
Ubon Ratchathani, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 32 | 315 | 16 | 82% | 3,6h | 12.2h |
| Nakhon Ratchasima |
|---|
Nakhon Ratchasima, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 32 | 240 | 14 | 80% | 3,6h | 12.2h |
| Bangkok |
|---|
Bangkok, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length | Sea
temperature |
|---|
| Min | Max | Days | | | | |
|---|
| 25 | 33 | 335 | 21 | 78% | 5,2h | 12.2h | 29 |
| Pattaya |
|---|
Pattaya, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length | Sea
temperature |
|---|
| Min | Max | Days | | | | |
|---|
| 25 | 31 | 205 | 17 | 81% | 3,6h | 12.2h | 29 |
| Chanthaburi |
|---|
Chanthaburi, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 24 | 32 | 500 | 25 | 85% | 1,8h | 12.2h |
| Ko Samui |
|---|
Ko Samui, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length | Sea
temperature |
|---|
| Min | Max | Days | | | | |
|---|
| 25 | 32 | 120 | 11 | 80% | 4,8h | 12.2h | 29 |
| Surat Thani |
|---|
Surat Thani, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 23 | 33 | 170 | 14 | 82% | 3,6h | 12.2h |
| Nakhon Si Thammarat |
|---|
Nakhon Si Thammarat, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 23 | 33 | 155 | 14 | 80% | 3,6h | 12.2h |
| Krabi |
|---|
Krabi, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length | Sea
temperature |
|---|
| Min | Max | Days | | | | |
|---|
| 23 | 31 | 275 | 19 | 87% | 4,8h | 12.2h | 29 |
| Phuket |
|---|
Phuket, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length | Sea
temperature |
|---|
| Min | Max | Days | | | | |
|---|
| 24 | 31 | 325 | 19 | 82% | 3,6h | 12.2h | 29 |
| Songkhla |
|---|
Songkhla, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length | Sea
temperature |
|---|
| Min | Max | Days | | | | |
|---|
| 25 | 33 | 105 | 14 | 76% | 4,8h | 12.2h | 29 |
| Hat Yai |
|---|
Hat Yai, position on the map |
|---|
| Precipitation | Humidity | Sunshine | Day length |
|---|
| Min | Max | Days | | | |
|---|
| 23 | 33 | 145 | 13 | 81% | 3,6h | 12.1h |
See also: Thailand, the weather in
August -
OctoberThe climate of
Thailand