Thailand
Ayutthaya in September
🌧️ Rainy seasonWarm, humid and very wet. Watch for flood risk.
🎒 Pack: light, breathable clothes & sunscreen · compact umbrella or rain jacket · quick-dry fabrics · waterproof sandals
Why September scores 6.7What goes into the score
How it works- Weather comfort50%5.4
- ✓Warm (30.7°C highs / 24.3°C lows)
- !Very humid/sticky (dew point 24.6°C)
- !Wet: ~300 mm rain, ~12 heavy-rain days
- Air quality20%7.4
- ✓Moderate (PM2.5 ~22 µg/m³)
- Seasonal hazards20%8.5
- !Flood: ~12 heavy-rain days (≥10 mm) in an average September
- Safety baseline10%8.0
- ·Normal precautions
| Sep | Dec | |
|---|---|---|
| Score | 6.7 Good | 8.9 Excellent |
| Season | 🌧️ Rainy season | 🌤️ Cool season |
| High / low | 31° / 24° | 30° / 20° |
| Rain | 300 mm | 10 mm |
| Humidity | dew pt 25° | dew pt 19° |
| PM2.5 | 22 µg/m³ | 14 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).
Holidays & crowdsSeptember 2027
No long holidaysNo long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.
No national public holidays in Thailand this month.
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore AyutthayaEvents, sights, food & souvenirs
Check event dates locallyThe former capital of the Siamese kingdom, now a UNESCO-listed historical park of temple ruins about 80 km north of Bangkok.
No major events on our calendar for September.
Coming up later
Loy KrathongDate variesFull moon of the 12th lunar month — usually November
People float small decorated offerings (krathong) on rivers.
Why go: Riverside temples are busy in the evening.
Where: Rivers around the city
Ayutthaya World Heritage FairDate variesUsually December
Light and sound shows celebrate the city's history.
Why go: Book accommodation early for the show nights.
Where: Historical park
SongkranEvery year13–15 April every year
Thai New Year with water throwing.
Why go: Expect to get wet; protect phones and cameras.
Where: Citywide
Wat Mahathat
Temple ruins with a Buddha head entwined in tree roots.
💡 Do not stand higher than the Buddha head; crouch for photos.
Wat Chaiwatthanaram
A riverside temple in Khmer style, popular at sunset.
Wat Phra Si Sanphet
Three chedis in the old royal palace grounds.
Wat Yai Chai Mongkhon
A temple with a tall chedi and rows of Buddha statues.
Bang Pa-In Palace
A royal palace complex south of the city.
💡 Dress modestly, covering shoulders and knees.
Wat Lokayasutharam
A large outdoor reclining Buddha.
Kuay teow ruea
Boat noodles in a rich, dark broth.
💡 Riverside stalls
Roti sai mai
Thin crepes wrapped around cotton-candy strands.
💡 Roadside shops in the city
Giant river prawns
Large freshwater prawns, usually grilled, a local favourite.
💡 Riverside restaurants
Roti sai mai
Packed sets of roti and candy floss.
💡 Shops around the city
Aranyik knives
Knives from a blacksmithing village in the province.
💡 Local markets