Roi Et in Fall
In fall (September, October and November), Roi Et sees average daytime highs around 31°C and overnight lows near 23°C, with 385 mm of rain over about 41 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 25% of the time across fall, and the air most often feels miserable.
Fall is Roi Et's 2nd-best season to visit on our travel score. For the whole year in context, see Roi Et's year-round climate.
- Avg daytime high
- 31°C
- 3rd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 385 mm
- 41 wet days
- Avg wind
- 10 km/h
- Travel score
- 4.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Roi Et in Fall
Across fall, daytime highs hold fairly steady around 31°C.
A typical fall day in Roi Et 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 Roi Et
Once humidity and wind are folded in, fall brings about 88 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.
Roi Et 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 | 31° / 18° | 6 | 1.6 | 11.2 | 5.9 |
| Feb | 33° / 20° | 11 | 2.1 | 11.5 | 4.6 |
| Mar | 35° / 24° | 37 | 6.5 | 11.9 | 2.9 |
| Apr | 36° / 26° | 66 | 11.3 | 12.4 | 2.1 |
| May | 34° / 26° | 180 | 21.3 | 12.7 | 2.0 |
| Jun | 33° / 26° | 169 | 21.2 | 12.9 | 2.2 |
| Jul | 33° / 26° | 207 | 23.5 | 12.9 | 2.4 |
| Aug | 32° / 25° | 240 | 25.2 | 12.5 | 2.5 |
| Sep | 32° / 25° | 253 | 24.5 | 12.1 | 2.7 |
| Oct | 31° / 24° | 109 | 12.5 | 11.6 | 4.0 |
| Nov | 31° / 22° | 24 | 3.5 | 11.3 | 5.2 |
| Dec | 30° / 19° | 5 | 1.2 | 11.1 | 6.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 25% of the time across fall.
Chance of precipitation in Fall
Roi Et gets around 385 mm of rain over 41 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 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 18 min in early September to 11 h 06 min 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 4.7 kWh/m².
Hazard calendar for Roi Et
In fall, Roi Et overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Roi Et's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Roi Et?
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 weaker month for outdoor sightseeing in Roi Et.
What to pack for Roi Et in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Roi Et sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 41 days see rain.
UV index in Roi Et 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 Roi Et peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 10 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 | 11 | 12 | 10 | 11 | 12 | 13 | 13 | 12 | 11 | 8 | 8 |
| Level | Very high | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 11 | Extreme |
| Mar | 12 | Extreme |
| Apr | 10 | Very high |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in Roi Et 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 Roi Et is worst in March — around 52 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (December, 20 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) | 28 | 40 | 52 | 41 | 30 | 22 | 24 | 25 | 28 | 28 | 23 | 20 |
| Level | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 28 | Moderate |
| Feb | 40 | Poor |
| Mar | 52 | Poor |
| Apr | 41 | Poor |
| May | 30 | Moderate |
| Jun | 22 | Moderate |
| Jul | 24 | Moderate |
| Aug | 25 | Moderate |
| Sep | 28 | Moderate |
| Oct | 28 | Moderate |
| Nov | 23 | Moderate |
| Dec | 20 | Moderate |
Where is Roi Et?
Roi Et sits at 16.1°N, 103.7°E, 148 m above sea level, in Thailand. The nearest listed city is Ban Selaphum, 32 km away.
Topography around Roi Et
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Roi Et.
Within 3 km, the terrain around Roi Et has only modest variations in elevation — a maximum elevation change of 30 m around an average of 147 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 61 m; within 80 km, significant variations in elevation — a maximum elevation change of 385 m.
The land around Roi Et is covered by artificial surfaces (41%) and trees (34%) within 3 km, cropland (76%) within 16 km, and cropland (79%) 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 Roi Et (16.0567°, 103.6531°, elevation 148 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.