Mae Sai in Winter
In winter (December, January and February), Mae Sai sees average daytime highs around 28°C and overnight lows near 14°C, with 70 mm of rain over about 10 wet days across the season. It is the coldest season of the year and the driest season of the year.
Over the season highs climb from about 27°C in early December to 32°C by late February. The sky is clear or mostly clear about 70% of the time across winter, and the air most often feels comfortable.
Winter is Mae Sai's best season of the year to visit on our travel score. For the whole year in context, see Mae Sai's year-round climate.
- Avg daytime high
- 28°C
- coldest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 70 mm
- 10 wet days
- Avg wind
- 4 km/h
- Travel score
- 7.3
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Mae Sai in Winter
Over the season highs climb from about 27°C in early December to 32°C by late February.
A typical winter day in Mae Sai reaches about 28°C and drops to 14°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Mae Sai
Once humidity and wind are folded in, winter brings about 1 day that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Mae Sai weather by month
How the three winter months (December, January and February) 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 | 27° / 14° | 25 | 3.4 | 10.9 | 7.9 |
| Feb | 30° / 14° | 15 | 2.4 | 11.3 | 6.1 |
| Mar | 33° / 17° | 39 | 5.1 | 11.9 | 4.2 |
| Apr | 34° / 21° | 112 | 10.7 | 12.5 | 3.2 |
| May | 33° / 23° | 277 | 21.3 | 13 | 2.8 |
| Jun | 32° / 24° | 349 | 26.7 | 13.2 | 2.4 |
| Jul | 31° / 24° | 455 | 28.5 | 13.1 | 2.5 |
| Aug | 31° / 24° | 424 | 28.7 | 12.7 | 2.6 |
| Sep | 31° / 23° | 287 | 24.2 | 12.1 | 3.0 |
| Oct | 30° / 22° | 134 | 16.7 | 11.5 | 4.3 |
| Nov | 29° / 18° | 47 | 6.5 | 11 | 6.5 |
| Dec | 26° / 15° | 31 | 4.4 | 10.8 | 7.9 |
Cloud cover in Winter
The sky is clear or mostly clear about 70% of the time across winter.
Chance of precipitation in Winter
Mae Sai gets around 70 mm of rain over 10 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 4 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 54 min in early December to 11 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.6 kWh/m².
Hazard calendar for Mae Sai
None of Mae Sai's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Mae Sai's monsoon runs May–September, when most of the year's rain falls.
Is winter a good time to visit Mae Sai?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit Mae Sai for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Mae Sai in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Mae Sai sees daytime highs around 28°C and nights near 14°C. Pack light clothes. Worth having: sun protection. About 10 days see rain.
UV index in Mae Sai in Winter
Clear-sky midday UV across winter averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mae Sai peaks around July 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 7 (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) | 7 | 9 | 9 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 8 | 7 |
| Level | High | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 9 | Very high |
| Mar | 9 | Very high |
| Apr | 10 | Very high |
| May | 11 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Mae Sai in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Mae Sai is worst in April — around 156 µg/m³ PM2.5 (very unhealthy), about 12.0× the cleanest month (July, 13 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) | 23 | 40 | 128 | 156 | 37 | 15 | 13 | 13 | 13 | 14 | 15 | 19 |
| Level | Moderate | Poor | Unhealthy | Very unhealthy | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 23 | Moderate |
| Feb | 40 | Poor |
| Mar | 128 | Unhealthy |
| Apr | 156 | Very unhealthy |
| May | 37 | Poor |
| Jun | 15 | Moderate |
| Jul | 13 | Moderate |
| Aug | 13 | Moderate |
| Sep | 13 | Moderate |
| Oct | 14 | Moderate |
| Nov | 15 | Moderate |
| Dec | 19 | Moderate |
Where is Mae Sai?
Mae Sai sits at 20.4°N, 99.9°E, 437 m above sea level, in Thailand. The nearest listed city is Tachilek, 2.0 km away.
Topography around Mae Sai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mae Sai.
Within 3 km, the terrain around Mae Sai has significant variations in elevation — a maximum elevation change of 398 m around an average of 464 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,235 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,977 m.
The land around Mae Sai is covered by trees (54%) and artificial surfaces (33%) within 3 km, trees (61%) and cropland (27%) within 16 km, and trees (81%) 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 Mae Sai (20.4335°, 99.8762°, elevation 437 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.