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Thailand · Month guide
Thailand in September
Around 31 °C with 284 mm of rain and 3.8 hours of sun a day.
September is a challenging month for Thailand overall; regional choices matter most. Around 31 °C with 284 mm of rain and 3.8 hours of sun a day. Use the regional grid below to find where this month works best — national averages hide the swings between coast, highlands, and inland.
Avoid
Thailand · September
What the weather usually does
Thailand · typical month
- Day / night24 – 31 °CYear range 19 – 35 °C
- Rainfall284 mmYear range 23 – 284 mm
- Sunshine3.8 hr / dayYear range 3.6 – 8.2 hr / day
What’s open · September
Things to do in Thailand in September
September closes 1 thing below; the rest run as normal.
- ClosedSimilan and Surin Islands
the national park shuts for about five months each year so the reefs can recover, and because the southwest monsoon makes the crossing unsafe. Recent closures have run mid-May to mid-October
Sources: nationthailand.com, thainationalparks.com
Opening seasons are checked by hand against the operators and parks themselves, not derived from the climate figures on this page. Last reviewed 2026-08-28. Dates move — confirm before you book.
77 regions · current month
Thailand, taken apart
- Amnat Charoen31°C now · 30–36 °C yr
- Ang Thong33°C now · 32–38 °C yr
- Bangkok32°C now · 31–35 °C yr
- Bueng Kan32°C now · 29–35 °C yr
- Buri Ram32°C now · 30–36 °C yr
- Chachoengsao32°C now · 31–35 °C yr
- Chai Nat33°C now · 31–38 °C yr
- Chaiyaphum31°C now · 29–34 °C yr
- Chanthaburi30°C now · 30–33 °C yr
- Chiang Mai29°C now · 27–34 °C yr
- Chiang Rai31°C now · 28–35 °C yr
- Chon Buri31°C now · 31–34 °C yr
- Chumphon30°C now · 29–33 °C yr
- Kalasin32°C now · 30–36 °C yr
- Kamphaeng Phet32°C now · 30–36 °C yr
- Kanchanaburi30°C now · 29–35 °C yr
- Khon Kaen32°C now · 30–36 °C yr
- Krabi30°C now · 30–34 °C yr
- Lampang31°C now · 29–36 °C yr
- Lamphun31°C now · 29–36 °C yr
- Loei31°C now · 28–34 °C yr
- Lopburi32°C now · 31–37 °C yr
- Mae Hong Son29°C now · 28–35 °C yr
- Maha Sarakham32°C now · 30–36 °C yr
- Mukdahan31°C now · 29–35 °C yr
- Nakhon Nayok31°C now · 31–35 °C yr
- Nakhon Pathom33°C now · 32–36 °C yr
- Nakhon Phanom31°C now · 29–35 °C yr
- Nakhon Ratchasima31°C now · 29–35 °C yr
- Nakhon Sawan33°C now · 31–38 °C yr
- Nakhon Si Thammarat31°C now · 30–34 °C yr
- Nan31°C now · 29–35 °C yr
- Narathiwat31°C now · 28–33 °C yr
- Nong Bua Lam Phu32°C now · 29–36 °C yr
- Nong Khai32°C now · 29–36 °C yr
- Nonthaburi33°C now · 32–36 °C yr
- Pathum Thani33°C now · 32–36 °C yr
- Pattani32°C now · 29–33 °C yr
- Phang Nga29°C now · 29–33 °C yr
- Phatthalung32°C now · 29–33 °C yr
- Phayao31°C now · 29–36 °C yr
- Phetchabun31°C now · 30–35 °C yr
- Phetchaburi30°C now · 29–33 °C yr
- Phichit33°C now · 32–38 °C yr
- Phitsanulok31°C now · 30–36 °C yr
- Phra Nakhon Si Ayutthaya33°C now · 32–37 °C yr
- Phrae31°C now · 30–36 °C yr
- Phuket28°C now · 28–29 °C yr
- Prachin Buri31°C now · 30–35 °C yr
- Prachuap Khiri Khan30°C now · 29–33 °C yr
- Ranong29°C now · 29–33 °C yr
- Ratchaburi31°C now · 29–35 °C yr
- Rayong31°C now · 31–33 °C yr
- Roi Et32°C now · 30–36 °C yr
- Sa Kaeo31°C now · 31–35 °C yr
- Sakon Nakhon32°C now · 29–35 °C yr
- Samut Prakan32°C now · 31–34 °C yr
- Samut Sakhon32°C now · 30–33 °C yr
- Samut Songkhram32°C now · 30–34 °C yr
- Saraburi32°C now · 31–36 °C yr
- Satun30°C now · 29–33 °C yr
- Si Sa Ket31°C now · 30–36 °C yr
- Sing Buri33°C now · 32–38 °C yr
- Songkhla32°C now · 30–34 °C yr
- Sukhothai33°C now · 31–38 °C yr
- Suphan Buri33°C now · 31–37 °C yr
- Surat Thani31°C now · 30–34 °C yr
- Surin31°C now · 30–36 °C yr
- Tak29°C now · 28–34 °C yr
- Trang31°C now · 30–34 °C yr
- Trat29°C now · 29–32 °C yr
- Ubon Ratchathani31°C now · 30–36 °C yr
- Udon Thani32°C now · 29–36 °C yr
- Uthai Thani31°C now · 28–35 °C yr
- Uttaradit31°C now · 30–36 °C yr
- Yala31°C now · 29–33 °C yr
- Yasothon32°C now · 30–36 °C yr
Safety · 6 governments
What the governments say about Thailand
Combined advisory · most-cautious-wins
Exercise increased caution
Highest level across 6 governments · Advisory last changed
See breakdown by countryHide breakdown
CA
Level 2Exercise increased caution
Exercise increased caution
DE
Level 1Exercise normal precautions
Exercise normal precautions
NL
Level 2Exercise increased caution
Exercise increased caution
UK
Level 1Exercise normal precautions
Exercise normal precautions
US
Level 1Exercise normal precautions
Exercise normal precautions
Parts of Thailand carry a higher advisory — up to level 4, "Do not travel". The governments concerned name a region rather than a boundary, so the carve-out is not drawn on the map and is not reflected in the combined level above. Follow the source links for where it applies.
Climate at a glance · 10-year ERA5
A decade of weather, in one page
— daytime high— overnight low▬ typical range
View data table
| Month | Average daytime high (°C) | Average overnight low (°C) | Typical low | Typical high |
|---|---|---|---|---|
| January | 30.1 | 18.6 | 15.0 | 32.5 |
| February | 32.0 | 19.6 | 17.1 | 34.7 |
| March | 34.3 | 22.5 | 19.7 | 36.8 |
| April | 35.0 | 24.5 | 22.2 | 38.3 |
| May | 33.6 | 25.2 | 24.0 | 37.3 |
| June | 32.3 | 25.0 | 24.3 | 34.1 |
| July | 31.4 | 24.7 | 24.0 | 33.6 |
| August | 31.2 | 24.6 | 23.9 | 33.1 |
| September | 31.1 | 24.3 | 23.6 | 32.8 |
| October | 30.9 | 23.4 | 21.5 | 32.6 |
| November | 30.4 | 21.7 | 19.1 | 32.6 |
| December | 29.5 | 19.1 | 15.5 | 32.3 |
View data table
| Month | Rainfall (mm) |
|---|---|
| January | 29 |
| February | 23 |
| March | 38 |
| April | 80 |
| May | 188 |
| June | 193 |
| July | 254 |
| August | 260 |
| September | 284 |
| October | 185 |
| November | 87 |
| December | 38 |
View data table
| Month | Sunshine hours (hr / day) |
|---|---|
| January | 7.2 |
| February | 8.1 |
| March | 8.2 |
| April | 7.7 |
| May | 5.9 |
| June | 4.7 |
| July | 3.6 |
| August | 3.6 |
| September | 3.8 |
| October | 4.9 |
| November | 5.9 |
| December | 6.8 |
— average▬ typical range
View data table
| Month | Average wind speed (km/h) | Typical low | Typical high |
|---|---|---|---|
| January | 7.5 | 5.2 | 11.6 |
| February | 7.6 | 5.4 | 11.3 |
| March | 7.1 | 5.6 | 9.1 |
| April | 6.8 | 4.7 | 8.9 |
| May | 6.2 | 4.2 | 8.7 |
| June | 7.5 | 5.2 | 9.6 |
| July | 7.8 | 4.8 | 10.9 |
| August | 7.6 | 4.8 | 11.0 |
| September | 6.0 | 4.0 | 8.8 |
| October | 6.0 | 4.0 | 8.7 |
| November | 7.3 | 4.2 | 11.3 |
| December | 8.4 | 5.2 | 12.3 |
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