Chai Nat in Fall
In fall (September, October and November), Chai Nat sees average daytime highs around 33°C and overnight lows near 25°C, with 471 mm of rain over about 50 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across fall, daytime highs hold fairly steady around 33°C. The sky is clear or mostly clear about 22% of the time across fall, and the air most often feels miserable.
Fall is Chai Nat's 2nd-best season to visit on our travel score. For the whole year in context, see Chai Nat's year-round climate.
- Avg daytime high
- 33°C
- coldest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 471 mm
- 50 wet days
- Avg wind
- 6 km/h
- Travel score
- 3.1
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Chai Nat in Fall
Across fall, daytime highs hold fairly steady around 33°C.
A typical fall day in Chai Nat reaches about 33°C and drops to 25°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Chai Nat
Once humidity and wind are folded in, fall brings about 91 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.
Chai Nat 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 | 33° / 21° | 10 | 2.2 | 11.2 | 4.6 |
| Feb | 35° / 23° | 12 | 2.1 | 11.5 | 3.2 |
| Mar | 37° / 25° | 39 | 6.6 | 11.9 | 1.8 |
| Apr | 38° / 27° | 78 | 12.8 | 12.3 | 1.1 |
| May | 36° / 27° | 151 | 21.7 | 12.7 | 1.3 |
| Jun | 36° / 27° | 124 | 22.1 | 12.9 | 1.5 |
| Jul | 35° / 27° | 137 | 22.9 | 12.8 | 1.7 |
| Aug | 34° / 26° | 179 | 24.1 | 12.5 | 1.9 |
| Sep | 33° / 26° | 260 | 25.5 | 12.1 | 2.0 |
| Oct | 32° / 25° | 179 | 18.8 | 11.7 | 3.0 |
| Nov | 32° / 23° | 32 | 5.2 | 11.3 | 4.4 |
| Dec | 32° / 21° | 9 | 1.7 | 11.1 | 5.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 22% of the time across fall.
Chance of precipitation in Fall
Chai Nat gets around 471 mm of rain over 50 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 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 18 min in early September to 11 h 12 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 4.6 kWh/m².
Hazard calendar for Chai Nat
In fall, Chai Nat overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Chai Nat's monsoon runs May–October, when most of the year's rain falls.
Is fall a good time to visit Chai Nat?
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 Chai Nat.
What to pack for Chai Nat in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Chai Nat sees daytime highs around 33°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 50 days see rain.
UV index in Chai Nat 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 Chai Nat peaks around August 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 | 10 | 12 | 11 | 11 | 12 | 13 | 14 | 12 | 10 | 8 | 8 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 14 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in Chai Nat 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 Chai Nat is worst in March — around 56 µg/m³ PM2.5 (unhealthy), about 3.3× the cleanest month (June, 17 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) | 39 | 48 | 56 | 40 | 26 | 17 | 18 | 19 | 22 | 28 | 28 | 30 |
| Level | Poor | Poor | Unhealthy | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 39 | Poor |
| Feb | 48 | Poor |
| Mar | 56 | Unhealthy |
| Apr | 40 | Poor |
| May | 26 | Moderate |
| Jun | 17 | Moderate |
| Jul | 18 | Moderate |
| Aug | 19 | Moderate |
| Sep | 22 | Moderate |
| Oct | 28 | Moderate |
| Nov | 28 | Moderate |
| Dec | 30 | Moderate |
Where is Chai Nat?
Chai Nat sits at 15.2°N, 100.1°E, 26 m above sea level, in Thailand. The nearest listed city is Uthai Thani, 24 km away.
Topography around Chai Nat
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chai Nat.
Within 3 km, the terrain around Chai Nat has only modest variations in elevation — a maximum elevation change of 107 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 233 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,204 m.
The land around Chai Nat is covered by cropland (36%) and trees (35%) within 3 km, cropland (74%) 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 Chai Nat (15.1864°, 100.1235°, elevation 26 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.