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Ayutthaya Weather in September
Ayutthaya in September averages 34°C (93°F) during the day and 26°C (79°F) at night. This is the wettest month of the year.
Rainfall in Ayutthaya in September
The month brings the heaviest rain of the year, often in intense bursts. Make sure to have a poncho to stay dry during the showers. On average, there are about 19 days with rain during this month, averaging 285 mm (11 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Ayutthaya in September
In September, Ayutthaya sees very high temperatures, with highs of 34°C (93°F). Nights drop to around 26°C (79°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights are warm at 26°C (79°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Ayutthaya in September
The area enjoys a balanced 155 hours of sunlight, ensuring it's neither too overcast nor too sunny.Our weather planner can help you explore other travel destinations worldwide.
Ayutthaya Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
34°C (93°F)
Chance of Rain
64%
Precipitation
285 mm (11 in)
Rainy days
19 days
Humidity
79% *
Sunshine
155 hours *
Percentage Sunshine
*
* Data from: Bangkok, Thailand (69 KM, 43 Miles).
Ayutthaya Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ayutthaya - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ayutthaya typically stay consistent throughout September, with daily highs averaging around 34°C (93°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Ayutthaya in September
Browse day-by-day weather records for Ayutthaya spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ayutthaya historical weather extremes in September
The extremes listed below come from historical weather data collected in Ayutthaya from 1976 through 2025.
- On September 14, 1997, temperatures climbed to 39°C (102°F), marking the warmest September day on record.
- Ayutthaya experienced its chilliest September day on September 20, 2013, reaching only 26°C (79°F).
- Ayutthaya registered its coldest September night on September 10, 1977, with temperatures dropping to 21°C (70°F).
Best Places in Thailand in September
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ayutthaya in September
Hot weather in September means keeping cool is the priority. Loose-fitting clothes in natural fabrics work best. Pack plenty of shorts, tank tops, and breathable shirts. Don't forget a hat, swimwear, and comfortable sandals. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Ayutthaya in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Ayutthaya 3-Day Forecast
More climate data for Ayutthaya
Temperature Rainfall Sunshine Humidity
See the full Ayutthaya climate overview or explore weather in Thailand.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bangkok
34°C (93°F) Chiang Mai33°C (91°F) Jomtien Beach32°C (90°F) Hua Hin32°C (90°F) Ao Nang Beach30°C (86°F) Koh Samui30°C (86°F) Ko Lanta30°C (86°F) Patong Beach29°C (84°F) Bucket list
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