Den Chai in Summer
In summer (June, July and August), Den Chai sees average daytime highs around 31°C and overnight lows near 25°C, with 851 mm of rain over about 81 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 31°C. The sky is clear or mostly clear about 1% of the time across summer, and the air most often feels miserable.
Summer is Den Chai's 3rd-best season to visit on our travel score. For the whole year in context, see Den Chai's year-round climate.
- Avg daytime high
- 31°C
- 2nd-warmest season
- Avg overnight low
- 25°C
- Rainfall
- 851 mm
- 81 wet days
- Avg wind
- 7 km/h
- Travel score
- 2.5
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Den Chai in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in Den Chai reaches about 31°C and drops to 25°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Den Chai
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.
Den Chai 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 | 30° / 16° | 18 | 2.1 | 11 | 6.2 |
| Feb | 33° / 18° | 10 | 1.3 | 11.4 | 4.7 |
| Mar | 35° / 21° | 31 | 4.1 | 11.9 | 2.9 |
| Apr | 36° / 24° | 62 | 9.1 | 12.4 | 2.0 |
| May | 34° / 25° | 205 | 20.6 | 12.8 | 2.3 |
| Jun | 32° / 25° | 236 | 25.1 | 13.1 | 2.4 |
| Jul | 31° / 25° | 274 | 27.1 | 13 | 2.5 |
| Aug | 31° / 24° | 341 | 28.9 | 12.6 | 2.5 |
| Sep | 31° / 24° | 295 | 26.6 | 12.1 | 2.6 |
| Oct | 31° / 23° | 126 | 15.8 | 11.6 | 3.9 |
| Nov | 31° / 20° | 30 | 4.6 | 11.2 | 5.4 |
| Dec | 29° / 17° | 14 | 2 | 10.9 | 6.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 1% of the time across summer.
Chance of precipitation in Summer
Den Chai gets around 851 mm of rain over 81 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 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 hours in early June to 12 h 24 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 4.2 kWh/m².
Hazard calendar for Den Chai
In summer, Den Chai overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Den Chai's monsoon runs May–September, when most of the year's rain falls.
Is summer a good time to visit Den Chai?
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 Den Chai.
What to pack for Den Chai in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Den Chai sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 81 days see rain.
UV index in Den Chai 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 Den Chai peaks around June 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (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) | 8 | 10 | 9 | 10 | 12 | 13 | 12 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 9 | Very high |
| Apr | 10 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | Very high |
Air quality in Den Chai 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 Den Chai is worst in March — around 63 µg/m³ PM2.5 (unhealthy), about 3.1× the cleanest month (June, 21 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) | 43 | 49 | 63 | 53 | 31 | 21 | 21 | 22 | 26 | 31 | 33 | 36 |
| Level | Poor | Poor | Unhealthy | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 43 | Poor |
| Feb | 49 | Poor |
| Mar | 63 | Unhealthy |
| Apr | 53 | Poor |
| May | 31 | Moderate |
| Jun | 21 | Moderate |
| Jul | 21 | Moderate |
| Aug | 22 | Moderate |
| Sep | 26 | Moderate |
| Oct | 31 | Moderate |
| Nov | 33 | Moderate |
| Dec | 36 | Poor |
Where is Den Chai?
Den Chai sits at 18.0°N, 100.1°E, 159 m above sea level, in Thailand. The nearest listed city is Phrae, 20 km away.
Topography around Den Chai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Den Chai.
Within 3 km, the terrain around Den Chai has only modest variations in elevation — a maximum elevation change of 159 m around an average of 166 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,034 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,610 m.
The land around Den Chai is covered by trees (46%) and cropland (40%) within 3 km, trees (81%) within 16 km, and trees (76%) 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 Den Chai (17.9837°, 100.0522°, elevation 159 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.