Mae Sai weather in March
In March, Mae Sai sees average daytime highs of 33°C and overnight lows near 17°C, with 39 mm of rain across 5.1 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 74% of the time in March, and the air most often feels humid.
Daylight stretches from about 11 h 36 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is Mae Sai's 2nd-clearest and 1st-windiest month. For the whole year in context, see Mae Sai's year-round climate.
- Daytime high
- 33°
- 2nd warmest
- Overnight low
- 17°
- 4th coldest
- Rainfall
- 39 mm
- 5.1 wet days
- Daylight
- 11 h 54 min
- 6:35 AM – 6:26 PM
- Cloud cover
- 27%
- 2nd clearest
- Wind
- 4 km/h
- 1st windiest
- Solar energy
- 6.11 kWh/m²
- Travel score
- 4.2
- out of 10
Mae Sai is subdistrict municipality in Chiang Rai province, Thailand.
- Density
- 5,365/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Day-to-day highs hold fairly steady near 33°C through the month.
A typical March day in Mae Sai reaches about 33°C in the afternoon and slips back to 17°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, March runs about 3°C warmer than February and on par with April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Avg low (°C) | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 32 | 15 |
| 2 | 32 | 15 |
| 3 | 32 | 15 |
| 4 | 32 | 16 |
| 5 | 33 | 16 |
| 6 | 33 | 16 |
| 7 | 33 | 16 |
| 8 | 33 | 16 |
| 9 | 33 | 16 |
| 10 | 33 | 16 |
| 11 | 33 | 16 |
| 12 | 33 | 17 |
| 13 | 33 | 17 |
| 14 | 33 | 17 |
| 15 | 33 | 17 |
| 16 | 33 | 17 |
| 17 | 33 | 17 |
| 18 | 33 | 17 |
| 19 | 33 | 18 |
| 20 | 33 | 18 |
| 21 | 33 | 18 |
| 22 | 33 | 18 |
| 23 | 33 | 18 |
| 24 | 33 | 18 |
| 25 | 33 | 18 |
| 26 | 33 | 19 |
| 27 | 33 | 19 |
| 28 | 33 | 19 |
| 29 | 33 | 19 |
| 30 | 33 | 19 |
| 31 | 33 | 19 |
How March really feels in Mae Sai
Once humidity and wind are folded in, March averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in March is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Mae Sai weather by month
How March compares with the rest of the year at a glance. March is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.
| 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 March
The sky is clear or mostly clear about 74% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 10% of March, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 91 | 90 | 90 | 90 | 89 | 88 | 88 | 87 | 87 | 87 | 86 | 86 | 86 | 86 | 86 | 85 | 85 | 84 | 84 | 84 | 83 | 83 | 82 | 82 | 81 | 81 | 81 | 80 | 80 | 80 | 80 |
| Cloudier (%) | 9 | 10 | 10 | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 20 | 20 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 91 | 9 |
| 2 | 90 | 10 |
| 3 | 90 | 10 |
| 4 | 90 | 10 |
| 5 | 89 | 11 |
| 6 | 88 | 12 |
| 7 | 88 | 12 |
| 8 | 87 | 13 |
| 9 | 87 | 13 |
| 10 | 87 | 13 |
| 11 | 86 | 14 |
| 12 | 86 | 14 |
| 13 | 86 | 14 |
| 14 | 86 | 14 |
| 15 | 86 | 14 |
| 16 | 85 | 15 |
| 17 | 85 | 15 |
| 18 | 84 | 16 |
| 19 | 84 | 16 |
| 20 | 84 | 16 |
| 21 | 83 | 17 |
| 22 | 83 | 17 |
| 23 | 82 | 18 |
| 24 | 82 | 18 |
| 25 | 81 | 19 |
| 26 | 81 | 19 |
| 27 | 81 | 19 |
| 28 | 80 | 20 |
| 29 | 80 | 20 |
| 30 | 80 | 20 |
| 31 | 80 | 20 |
Chance of precipitation in March
Mae Sai gets around 39 mm of rain over 5.1 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 16% and peaks near 26% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 14 | 15 | 15 | 16 | 17 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 25 | 25 | 26 |
| Rain chance (%) | |
|---|---|
| 1 | 9 |
| 2 | 9 |
| 3 | 10 |
| 4 | 10 |
| 5 | 10 |
| 6 | 11 |
| 7 | 11 |
| 8 | 11 |
| 9 | 12 |
| 10 | 12 |
| 11 | 13 |
| 12 | 13 |
| 13 | 13 |
| 14 | 14 |
| 15 | 15 |
| 16 | 15 |
| 17 | 16 |
| 18 | 17 |
| 19 | 18 |
| 20 | 19 |
| 21 | 19 |
| 22 | 20 |
| 23 | 21 |
| 24 | 22 |
| 25 | 23 |
| 26 | 23 |
| 27 | 24 |
| 28 | 25 |
| 29 | 25 |
| 30 | 25 |
| 31 | 26 |
Humidity in March
Most of March feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the humid band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 15 | 14 | 13 | 13 | 12 | 11 | 11 | 10 | 9 | 9 | 8 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 47 | 46 | 46 | 46 | 45 | 45 | 44 | 43 | 42 | 41 | 41 | 40 | 39 | 38 | 37 | 35 | 34 | 33 | 31 | 30 | 28 | 26 | 24 | 22 | 20 | 18 | 17 | 15 | 14 | 12 | 11 |
| Humid (%) | 29 | 30 | 30 | 31 | 31 | 32 | 33 | 33 | 34 | 35 | 35 | 36 | 36 | 37 | 37 | 38 | 38 | 38 | 38 | 38 | 38 | 37 | 37 | 37 | 36 | 36 | 35 | 34 | 33 | 33 | 32 |
| Muggy (%) | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 22 | 23 | 25 | 27 | 29 | 31 | 33 | 36 | 38 | 40 | 42 | 44 | 46 | 47 | 48 |
| Oppressive (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 15 | 47 | 29 | 9 | 1 |
| 2 | 14 | 46 | 30 | 9 | 1 |
| 3 | 13 | 46 | 30 | 9 | 1 |
| 4 | 13 | 46 | 31 | 10 | 1 |
| 5 | 12 | 45 | 31 | 10 | 1 |
| 6 | 11 | 45 | 32 | 11 | 1 |
| 7 | 11 | 44 | 33 | 11 | 1 |
| 8 | 10 | 43 | 33 | 12 | 1 |
| 9 | 9 | 42 | 34 | 13 | 2 |
| 10 | 9 | 41 | 35 | 14 | 2 |
| 11 | 8 | 41 | 35 | 15 | 2 |
| 12 | 7 | 40 | 36 | 16 | 2 |
| 13 | 6 | 39 | 36 | 17 | 2 |
| 14 | 6 | 38 | 37 | 18 | 2 |
| 15 | 5 | 37 | 37 | 19 | 2 |
| 16 | 4 | 35 | 38 | 20 | 3 |
| 17 | 4 | 34 | 38 | 22 | 3 |
| 18 | 3 | 33 | 38 | 23 | 3 |
| 19 | 3 | 31 | 38 | 25 | 3 |
| 20 | 2 | 30 | 38 | 27 | 4 |
| 21 | 2 | 28 | 38 | 29 | 4 |
| 22 | 1 | 26 | 37 | 31 | 4 |
| 23 | 1 | 24 | 37 | 33 | 4 |
| 24 | 1 | 22 | 37 | 36 | 5 |
| 25 | 1 | 20 | 36 | 38 | 5 |
| 26 | 1 | 18 | 36 | 40 | 6 |
| 27 | 1 | 17 | 35 | 42 | 6 |
| 28 | 0 | 15 | 34 | 44 | 7 |
| 29 | 0 | 14 | 33 | 46 | 7 |
| 30 | 0 | 12 | 33 | 47 | 8 |
| 31 | 0 | 11 | 32 | 48 | 9 |
Wind in March
Winds average 4 km/h in March, the windiest month of the year.
Across March, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
| 31 | 4 | calm |
Sunrise & sunset in March
Daylight runs from about 11 h 36 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 36 minutes over March. Sunrise moves from 6:47 AM to 6:21 AM, and sunset from 6:21 PM to 6:30 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 |
| Sunrise (AM) | 6:47 | 6:46 | 6:45 | 6:45 | 6:44 | 6:43 | 6:42 | 6:41 | 6:41 | 6:40 | 6:39 | 6:38 | 6:37 | 6:36 | 6:35 | 6:35 | 6:34 | 6:33 | 6:32 | 6:31 | 6:30 | 6:29 | 6:28 | 6:27 | 6:26 | 6:25 | 6:24 | 6:24 | 6:23 | 6:22 | 6:21 |
| Sunset (PM) | 6:21 | 6:21 | 6:21 | 6:22 | 6:22 | 6:22 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:25 | 6:26 | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:28 | 6:28 | 6:28 | 6:28 | 6:29 | 6:29 | 6:29 | 6:30 | 6:30 | 6:30 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:47 | 6:21 |
| 2 | 11.6 | 6:46 | 6:21 |
| 3 | 11.6 | 6:45 | 6:21 |
| 4 | 11.6 | 6:45 | 6:22 |
| 5 | 11.6 | 6:44 | 6:22 |
| 6 | 11.7 | 6:43 | 6:22 |
| 7 | 11.7 | 6:42 | 6:23 |
| 8 | 11.7 | 6:41 | 6:23 |
| 9 | 11.7 | 6:41 | 6:24 |
| 10 | 11.7 | 6:40 | 6:24 |
| 11 | 11.8 | 6:39 | 6:24 |
| 12 | 11.8 | 6:38 | 6:25 |
| 13 | 11.8 | 6:37 | 6:25 |
| 14 | 11.8 | 6:36 | 6:25 |
| 15 | 11.8 | 6:35 | 6:25 |
| 16 | 11.9 | 6:35 | 6:26 |
| 17 | 11.9 | 6:34 | 6:26 |
| 18 | 11.9 | 6:33 | 6:26 |
| 19 | 11.9 | 6:32 | 6:27 |
| 20 | 11.9 | 6:31 | 6:27 |
| 21 | 12.0 | 6:30 | 6:27 |
| 22 | 12.0 | 6:29 | 6:28 |
| 23 | 12.0 | 6:28 | 6:28 |
| 24 | 12.0 | 6:27 | 6:28 |
| 25 | 12.0 | 6:26 | 6:28 |
| 26 | 12.1 | 6:25 | 6:29 |
| 27 | 12.1 | 6:24 | 6:29 |
| 28 | 12.1 | 6:24 | 6:29 |
| 29 | 12.1 | 6:23 | 6:30 |
| 30 | 12.1 | 6:22 | 6:30 |
| 31 | 12.2 | 6:21 | 6:30 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 6.11 kWh/m².
For context, solar energy here swings from a low near 3.91 kWh/m² to a high of 6.25 kWh/m² in April across the year — March's 6.11 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.8 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.8 | Bright |
| 2 | 5.9 | Bright |
| 3 | 5.9 | Bright |
| 4 | 5.9 | Bright |
| 5 | 6.0 | Bright |
| 6 | 6.0 | Bright |
| 7 | 6.0 | Intense |
| 8 | 6.0 | Intense |
| 9 | 6.0 | Intense |
| 10 | 6.1 | Intense |
| 11 | 6.1 | Intense |
| 12 | 6.1 | Intense |
| 13 | 6.1 | Intense |
| 14 | 6.1 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.2 | Intense |
| 18 | 6.2 | Intense |
| 19 | 6.2 | Intense |
| 20 | 6.2 | Intense |
| 21 | 6.2 | Intense |
| 22 | 6.2 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.2 | Intense |
| 28 | 6.2 | Intense |
| 29 | 6.2 | Intense |
| 30 | 6.2 | Intense |
| 31 | 6.2 | Intense |
Hazard calendar for Mae Sai
None of Mae Sai's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Mae Sai's monsoon runs May–September, when most of the year's rain falls.
Is March a good time to visit Mae Sai?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a reasonable time to visit Mae Sai for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Mae Sai in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Mae Sai sees daytime highs around 33°C and nights near 17°C. Pack light clothes and sun protection. About 5 days see rain.
UV index in Mae Sai in March
Clear-sky midday UV in March peaks around 9 (very high — sun protection essential). 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 March
Average fine-particle pollution (PM2.5) through the year — so you can see where March 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).