Hat Yai in Fall
In fall (September, October and November), Hat Yai sees average daytime highs around 31°C and overnight lows near 24°C, with 796 mm of rain over about 80 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Over the season highs ease from about 32°C in early September to 29°C by late November. The sky is clear or mostly clear about 3% of the time across fall, and the air most often feels miserable.
Fall is Hat Yai's weakest season of the year to visit on our travel score. Hat Yai has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Hat Yai's year-round climate.
- Avg daytime high
- 31°C
- 3rd-warmest season
- Avg overnight low
- 24°C
- Rainfall
- 796 mm
- 80 wet days
- Avg wind
- 7 km/h
- Travel score
- 2.6
- weakest season of the year
- Months
- Sep · Oct · Nov
Temperature in Hat Yai in Fall
Over the season highs ease from about 32°C in early September to 29°C by late November.
A typical fall day in Hat Yai reaches about 31°C and drops to 24°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Hat Yai
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.
Hat Yai 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 | 30° / 24° | 88 | 12.3 | 11.6 | 4.5 |
| Feb | 31° / 24° | 43 | 7.1 | 11.8 | 4.4 |
| Mar | 33° / 24° | 94 | 12.6 | 12 | 3.4 |
| Apr | 33° / 25° | 136 | 19.3 | 12.1 | 2.6 |
| May | 33° / 25° | 150 | 23.5 | 12.3 | 2.3 |
| Jun | 33° / 25° | 114 | 19.4 | 12.4 | 2.7 |
| Jul | 33° / 25° | 115 | 19.8 | 12.4 | 2.8 |
| Aug | 33° / 25° | 121 | 20.8 | 12.2 | 2.7 |
| Sep | 32° / 25° | 164 | 24.1 | 12 | 2.5 |
| Oct | 31° / 24° | 285 | 28.1 | 11.8 | 2.5 |
| Nov | 30° / 24° | 347 | 27.3 | 11.7 | 2.9 |
| Dec | 29° / 24° | 277 | 21.9 | 11.6 | 3.7 |
Cloud cover in Fall
The sky is clear or mostly clear about 3% of the time across fall.
Chance of precipitation in Fall
Hat Yai gets around 796 mm of rain over 80 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 7 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early September to 11 h 36 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 Hat Yai
In fall, Hat Yai overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Hat Yai sits in the Pacific typhoon belt; the season peaks July–October.
Hat Yai's rainy season runs September–December, when most of the year's rain falls.
Is fall a good time to visit Hat Yai?
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 Hat Yai.
What to pack for Hat Yai in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Hat Yai sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 80 days see rain.
Sea temperature near Hat Yai in Fall
The nearest coast averages about 29°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 21 km away) is warmest in May at about 31°C and coldest in January near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 30 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 31 | Tropical |
| Jun | 31 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Hat Yai in Fall
Clear-sky midday UV across fall averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hat Yai peaks around February 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 11 (extreme).
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) | 11 | 14 | 13 | 13 | 13 | 12 | 11 | 13 | 13 | 12 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 14 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in Hat Yai 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 Hat Yai is worst in October — around 27 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 19 | 17 | 21 | 27 | 26 | 27 | 26 | 24 | 26 | 27 | 23 | 18 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 17 | Moderate |
| Mar | 21 | Moderate |
| Apr | 27 | Moderate |
| May | 26 | Moderate |
| Jun | 27 | Moderate |
| Jul | 26 | Moderate |
| Aug | 24 | Moderate |
| Sep | 26 | Moderate |
| Oct | 27 | Moderate |
| Nov | 23 | Moderate |
| Dec | 18 | Moderate |
Where is Hat Yai?
Hat Yai sits at 7.0°N, 100.5°E, 12 m above sea level, in Thailand. The nearest listed city is Ban Mai, 23 km away.
Topography around Hat Yai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hat Yai.
Within 3 km, the terrain around Hat Yai has only modest variations in elevation — a maximum elevation change of 65 m around an average of 12 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 418 m; within 80 km, large variations in elevation — a maximum elevation change of 1,146 m.
The land around Hat Yai is covered by artificial surfaces (67%) and trees (26%) within 3 km, trees (74%) within 16 km, and trees (61%) and water (29%) 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 Hat Yai (7.0084°, 100.4767°, elevation 12 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.