Tha Bo in Fall
In fall (September, October and November), Tha Bo sees average daytime highs around 31°C and overnight lows near 23°C, with 392 mm of rain over about 39 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Across fall, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 37% of the time across fall, and the air most often feels miserable.
Fall is Tha Bo's 2nd-best season to visit on our travel score. For the whole year in context, see Tha Bo's year-round climate.
- Avg daytime high
- 31°C
- 3rd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 392 mm
- 39 wet days
- Avg wind
- 5 km/h
- Travel score
- 4.2
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Tha Bo in Fall
Across fall, daytime highs hold fairly steady around 31°C.
A typical fall day in Tha Bo reaches about 31°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Tha Bo
Once humidity and wind are folded in, fall brings about 77 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Tha Bo weather by month
How the three fall months (September, October and November) 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 | 29° / 17° | 10 | 1.6 | 11 | 6.9 |
| Feb | 32° / 19° | 14 | 2.3 | 11.4 | 5.4 |
| Mar | 34° / 22° | 35 | 6.1 | 11.9 | 3.5 |
| Apr | 35° / 25° | 72 | 11.7 | 12.4 | 2.4 |
| May | 34° / 26° | 236 | 22.7 | 12.8 | 2.1 |
| Jun | 33° / 26° | 252 | 24.1 | 13 | 2.2 |
| Jul | 32° / 26° | 295 | 25.3 | 13 | 2.4 |
| Aug | 32° / 25° | 344 | 26.8 | 12.6 | 2.4 |
| Sep | 32° / 25° | 274 | 24.3 | 12.1 | 2.6 |
| Oct | 31° / 24° | 98 | 11.7 | 11.6 | 4.2 |
| Nov | 30° / 21° | 21 | 2.8 | 11.2 | 5.9 |
| Dec | 29° / 18° | 8 | 1.2 | 11 | 7.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 37% of the time across fall.
Chance of precipitation in Fall
Tha Bo gets around 392 mm of rain over 39 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 5 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 11 hours by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.6 kWh/m².
Hazard calendar for Tha Bo
In fall, Tha Bo overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Tha Bo sits in the Pacific typhoon belt; the season peaks July–October.
Tha Bo's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Tha Bo?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Tha Bo for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Tha Bo in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Tha Bo sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 39 days see rain.
UV index in Tha Bo in Fall
Clear-sky midday UV across fall averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Tha Bo peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 | 12 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 10 | Extreme |
| May | 11 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | Very high |
Air quality in Tha Bo in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Tha Bo is worst in March — around 77 µg/m³ PM2.5 (unhealthy), about 3.4× the cleanest month (July, 23 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) | 31 | 44 | 77 | 73 | 32 | 24 | 23 | 23 | 24 | 26 | 25 | 26 |
| Level | Moderate | Poor | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 31 | Moderate |
| Feb | 44 | Poor |
| Mar | 77 | Unhealthy |
| Apr | 73 | Unhealthy |
| May | 32 | Moderate |
| Jun | 24 | Moderate |
| Jul | 23 | Moderate |
| Aug | 23 | Moderate |
| Sep | 24 | Moderate |
| Oct | 26 | Moderate |
| Nov | 25 | Moderate |
| Dec | 26 | Moderate |
Where is Tha Bo?
Tha Bo sits at 17.9°N, 102.6°E, 182 m above sea level, in Thailand. The nearest listed city is Vientiane, 13 km away.
Topography around Tha Bo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tha Bo.
Within 3 km, the terrain around Tha Bo has only modest variations in elevation — a maximum elevation change of 32 m around an average of 169 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 64 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,486 m.
The land around Tha Bo is covered by cropland (43%) and trees (28%) within 3 km, cropland (47%) and trees (32%) within 16 km, and trees (54%) and cropland (39%) 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 Tha Bo (17.85°, 102.5814°, elevation 182 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.