Ayutthaya in Summer
In summer (June, July and August), Ayutthaya sees average daytime highs around 34°C and overnight lows near 26°C, with 473 mm of rain over about 72 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 34°C. The sky is clear or mostly clear about 2% of the time across summer, and the air most often feels miserable.
Summer is Ayutthaya's weakest season of the year to visit on our travel score. For the whole year in context, see Ayutthaya's year-round climate.
- Avg daytime high
- 34°C
- 2nd-warmest season
- Avg overnight low
- 26°C
- Rainfall
- 473 mm
- 72 wet days
- Avg wind
- 10 km/h
- Travel score
- 1.9
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Ayutthaya in Summer
Across summer, daytime highs hold fairly steady around 34°C.
A typical summer day in Ayutthaya reaches about 34°C and drops to 26°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Ayutthaya
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Ayutthaya weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 22° | 12 | 2.7 | 11.2 | 4.6 |
| Feb | 34° / 23° | 14 | 3.1 | 11.5 | 3.7 |
| Mar | 35° / 26° | 46 | 7.6 | 11.9 | 2.6 |
| Apr | 36° / 27° | 77 | 12.9 | 12.3 | 1.7 |
| May | 35° / 27° | 159 | 22.2 | 12.7 | 1.6 |
| Jun | 34° / 27° | 149 | 23.4 | 12.8 | 1.8 |
| Jul | 34° / 26° | 149 | 23.6 | 12.8 | 2.0 |
| Aug | 34° / 26° | 175 | 24.5 | 12.5 | 2.0 |
| Sep | 33° / 26° | 266 | 25.8 | 12.1 | 2.1 |
| Oct | 33° / 25° | 164 | 19.3 | 11.7 | 2.9 |
| Nov | 33° / 24° | 33 | 5.7 | 11.3 | 4.0 |
| Dec | 32° / 22° | 8 | 2 | 11.2 | 4.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 2% of the time across summer.
Chance of precipitation in Summer
Ayutthaya gets around 473 mm of rain over 72 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 48 min in early June to 12 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.9 kWh/m².
Hazard calendar for Ayutthaya
In summer, Ayutthaya overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Ayutthaya's monsoon runs May–October, when most of the year's rain falls.
Is summer a good time to visit Ayutthaya?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Ayutthaya.
What to pack for Ayutthaya in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ayutthaya sees daytime highs around 34°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 72 days see rain.
UV index in Ayutthaya in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ayutthaya peaks around August 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 9 | 12 | 11 | 11 | 12 | 12 | 13 | 12 | 10 | 8 | 8 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 9 | Very high |
| Mar | 12 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in Ayutthaya in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Ayutthaya is worst in January — around 83 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (July, 43 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 83 | 81 | 70 | 64 | 54 | 44 | 43 | 43 | 54 | 66 | 67 | 66 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor | Poor | Poor | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 83 | Unhealthy |
| Feb | 81 | Unhealthy |
| Mar | 70 | Unhealthy |
| Apr | 64 | Unhealthy |
| May | 54 | Poor |
| Jun | 44 | Poor |
| Jul | 43 | Poor |
| Aug | 43 | Poor |
| Sep | 54 | Poor |
| Oct | 66 | Unhealthy |
| Nov | 67 | Unhealthy |
| Dec | 66 | Unhealthy |
Where is Ayutthaya?
Ayutthaya sits at 14.4°N, 100.6°E, 7 m above sea level, in Thailand. The nearest listed city is Bang Ban, 10 km away.
Topography around Ayutthaya
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ayutthaya.
Within 3 km, the terrain around Ayutthaya has only modest variations in elevation — a maximum elevation change of 13 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 40 m; within 80 km, large variations in elevation — a maximum elevation change of 1,097 m.
The land around Ayutthaya is covered by artificial surfaces (38%) and trees (37%) within 3 km, cropland (52%) within 16 km, and cropland (56%) and trees (25%) within 80 km.
Thailand travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C
- 230 V · 50 Hz
- Prices
- ≈ 31% of US
- price level, 2025
- GDP per capita
- $8,057
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Homicide rate
- 4.8
- per 100k, 2011
- Road deaths
- 32.2
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 402
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ayutthaya (14.3517°, 100.5774°, elevation 7 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.