Ayutthaya weather by month
The best time to visit Ayutthaya is December to February — 80/100 in December, 32°C and 3 rainy days. The best season is the dry season, November to April (68/100 on average).
The worst month is September at 44/100 — sweltering, soaked, muggy air. See September →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Thailand →
Best season: November to April (68/100 on average) · worst September (44/100)
- Days
- 32°C
- Nights
- 21°C
- Wet days
- 3
- Sun
- 9.7 h
- Humidity
- 59%
- Daylight
- 11 h
Ayutthaya, month by month
Comfort score out of 100 for the kind of trip Ayutthaya is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Ayutthaya through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
- January
- Central plains burning haze20 Jan – 15 Apr (usually)Hazard
- April
- Songkran13–15 AprFestival
- May
- Visakha Bucha5 May – 5 Jun (usually)Holiday
- July
- Asalha Bucha and Khao Phansa5 Jul – 5 Aug (usually)Festival
- September
- Flood season on the rivers1 Sep – 15 Nov (usually)Hazard
- November
- Loi Krathong5–30 Nov (usually)Festival
- Cool, dry season15 Nov – 20 Feb (usually)Season
- December
- Ayutthaya World Heritage Fair10–23 Dec (usually)Festival
Crowds in Ayutthaya in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdstravelers describe it as peak season, Cool, dry season, Ayutthaya World Heritage Fair
Sourced from traveler notes: “…for the broader region this time of year: December is also peak tourist season, so popular sites and accommodations get busy and should be…” — Tripadvisor community
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Ayutthaya
Real experiences from travellers' own write-ups, quoted with a link to the original.
Getting around
A guide to exploring Ayutthaya's ancient ruins recommends renting a bike from one of the shops near the train station, typically around 50 THB for 24 hours, since the flat terrain makes cycling between temples genuinely easy rather than a workout. Their tip on scale: the historic core is compact enough to bike across in about 30 minutes, so a rented bike covers the main sights comfortably in a single day, with November through February as the most comfortable season temperature-wise.
Traveller notes on Ayutthaya
What people who have been say about the place — the year-round notes first, then month by month.
Thailand's forum is consistent that June sits in a relative lull between the wetter bookends of May and September - it's still hot and humid nationwide, and Ayutthaya specifically gets called out as brutal around midday, but the rain itself is usually a shower rather than an all-day event. Forum regulars who visited Ayutthaya in June had a genuinely good time, describing it as hot and humid with manageable showers rather than a washout. The advice that comes up again and again is to tour the temple ruins early in the morning and save the hottest hours for indoor breaks.
Forum posters describe December as highly predictable and among the most pleasant months across central Thailand generally, with hot daytime temperatures (commonly reaching into the low 30sC), clear skies and minimal rain, while evenings cool into the low-20s or even high-teensC - genuinely comfortable by regional standards. This makes December squarely inside Thailand's cool, dry high season, good conditions for exploring Ayutthaya's outdoor temple ruins on foot without the wet-season rain risk. The clear tradeoff posters note for the broader region this time of year: December is also peak tourist season, so popular sites and accommodations get busy and should be booked ahead.
Add your own note from Ayutthaya's card on the map.