Today
Sun, Jun 21
Thunderstorm with heavy hail
29°24°
- Rain chance
- 100%
- Precip
- 26.6 mm
- Max wind
- 11 km/h
Mae Sai air quality
Chiang Rai, Thailand · Bangkok time · 20.43°, 99.88°
Current conditions · 7:00 PM local
Current conditions in Mae Sai
25°C
Light drizzle
Feels like 32°C
- Humidity
- 99%
- Wind
- 4 km/h SSE
- Gusts
- 10 km/h
- UV index
- 0.3
- Visibility
- 7.7 km
Air quality
51
Moderate
US AQI · European AQI 25
Air quality in Mae Sai is currently moderate, with a US AQI of 51 (European AQI 25). The dominant pollutant right now is ozone. Unusually sensitive people should consider easing prolonged outdoor exertion. Fine particulate matter (PM2.5) measures 7 µg/m³.
Pollutants
- PM2.5
- 7 µg/m³
- PM10
- 7.7 µg/m³
- Ozone (O₃)
- 47 µg/m³
- NO₂
- 4.5 µg/m³
- SO₂
- 1.2 µg/m³
- CO
- 372 µg/m³
- Dust
- 1 µg/m³
AQI computed from the CAMS air quality model via Open-Meteo. Bands follow the US EPA scale.
Right now
Right now in Mae Sai, it's light drizzle with the temperature at 25 °C. It feels warmer than it reads, more like 32 °C. Wind is from the SSE at 4 km/h. Precipitation in the last hour measured 0.1 mm. Humidity stands at 99% with sea-level pressure near 1008 hPa.
At a glance
Today
29° / 24°Thunderstorm with heavy hail · rain likely (100%)
Tomorrow
31° / 24°Thunderstorm with slight hail · rain likely (90%)
Upcoming · to Saturday
33° / 24°Highs 33°, lows 24°. The most active day looks like Saturday, when rain chances peak at 94%.
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Next 3 days
Today brings thunderstorm with heavy hail with a high of 29 °C and a low of 24 °C. Rain chance peaks at 100% with around 26.6 mm possible. Tomorrow looks like thunderstorm with slight hail; temperatures run from 24 °C up to 31 °C. Rain chance peaks at 90% with around 4.3 mm possible. Expect thunderstorm with slight hail Tuesday, between 24 °C and 31 °C. Rain chance peaks at 86% with around 4.1 mm possible.
Tomorrow
Mon, Jun 22
Thunderstorm with slight hail
31°24°
- Rain chance
- 90%
- Precip
- 4.3 mm
- Max wind
- 13 km/h
Tuesday
Tue, Jun 23
Thunderstorm with slight hail
31°24°
- Rain chance
- 86%
- Precip
- 4.1 mm
- Max wind
- 14 km/h
Next 48 hours
- 12 AM25°96%4 km/h
- 1 AM25°100%4 km/h
- 2 AM24°100%3 km/h
- 3 AM24°100%3 km/h
- 4 AM24°100%3 km/h
- 5 AM24°100%2 km/h
- 6 AM24°99%4 km/h
- 7 AM24°96%4 km/h
- 8 AM25°89%6 km/h
- 9 AM26°81%7 km/h
- 10 AM28°76%8 km/h
- 11 AM28°78%11 km/h
- 12 PM27°85%11 km/h
- 1 PM28°90%9 km/h
- 2 PM29°93%10 km/h
- 3 PM29°95%7 km/h
- 4 PM28°96%9 km/h
- 5 PM25°97%6 km/h
- 6 PM26°98%3 km/h
- 7 PM25°96%4 km/h
- 8 PM25°91%4 km/h
- 9 PM25°84%4 km/h
- 10 PM25°75%4 km/h
- 11 PM25°64%3 km/h
- 12 AM24°52%2 km/h
- 1 AM24°41%2 km/h
- 2 AM24°33%3 km/h
- 3 AM24°27%3 km/h
- 4 AM24°22%2 km/h
- 5 AM24°17%3 km/h
- 6 AM24°14%4 km/h
- 7 AM24°16%5 km/h
- 8 AM25°26%5 km/h
- 9 AM26°40%7 km/h
- 10 AM27°53%8 km/h
- 11 AM29°60%10 km/h
- 12 PM30°66%12 km/h
- 1 PM31°71%13 km/h
- 2 PM31°79%12 km/h
- 3 PM30°88%11 km/h
- 4 PM28°90%10 km/h
- 5 PM28°80%8 km/h
- 6 PM28°64%7 km/h
- 7 PM27°49%6 km/h
- 8 PM26°38%5 km/h
- 9 PM26°29%5 km/h
- 10 PM26°22%5 km/h
- 11 PM25°17%5 km/h
In depth
The weather picture for Mae Sai opens with light drizzle; it's 25 °C out, feeling like 32 °C. Today's forecast calls for thunderstorm with heavy hail, topping out near 29 °C before falling back to 24 °C overnight. Winds blow mainly from the S around 11 km/h, with gusts up to 33 km/h. Daytime highs hold fairly steady this week, staying within 29 to 32 °C. Rain is in the picture on today, tomorrow, Tuesday and beyond, with roughly 62 mm expected in total across the week. Tomorrow brings thunderstorm with slight hail with a high of 31 °C and a 90% chance of precipitation. The UV index reaches 8 today, so sun protection is sensible during the middle of the day. Sunrise comes at 05:41 and sunset at 19:03, giving 13.4 hours of daylight. Current humidity sits at 99% with pressure near 1008 hPa. Looking further out, Thursday shows thunderstorm with slight hail with a high around 32 °C, while Saturday ends the week at 31 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Sun & UV
- Sunrise
- 5:41 AM
- Sunset
- 7:03 PM
- Daylight
- 13h 22m
- Max UV
- 7.7 High
Wind
- Wind
- 4 km/h
- Gusts
- 10 km/h
- Direction
- SSE (165°)
Farming weather
Soil temperatures today read surface 24.6 °C, 6 cm 26.9 °C, 18 cm 28.1 °C, 54 cm 27.4 °C. Soil moisture sits at 0-1 cm at 0.32 m³/m³, 3-9 cm at 0.33 m³/m³, 27-81 cm at 0.33 m³/m³. For wheat, the root-zone reading is within the ideal 0.2-0.35 m³/m³ band. Forecast rain (62 mm) roughly covers crop water demand (ET0 30 mm), so irrigation can likely be paused. A suitable spraying window opens around 09:00 on 2026-06-22, with winds at or below 15 km/h and no rain expected. Heat stress is likely for wheat with highs reaching 32 °C (threshold 32 °C). Projected growing degree days over the next week: wheat 161, maize 122.
- Topsoil moisture
- 0.309 m³/m³
- Soil temp
- 25°C
- ET₀ today
- 3.72 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 61.8 mm
- Wind
- 4 km/h
- Humidity
- 99%
Advisory summary
No weather alert thresholds are crossed for Mae Sai in the current forecast (derived from forecast data, not official warnings). Conditions may still change — check back for updates.
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All data for Mae Sai
| Variable | Value |
|---|---|
| City | Mae Sai, Chiang Rai, Thailand |
| Coordinates | 20.43353, 99.87617 |
| Elevation | 437 m |
| Timezone | Asia/Bangkok |
| Population | 27,520 |
| Observed at (local) | 7:00 PM |
| Temperature (2 m) | 25°C |
| Apparent temperature | 32°C |
| Relative humidity (2 m) | 99% |
| Dew point (2 m) | 25°C |
| Precipitation (last hour) | 0.1 mm |
| Rain | 0.1 mm |
| Showers | 0 mm |
| Snowfall | 0 cm |
| Weather code (WMO) | 51 |
| Cloud cover | 100% |
| Surface pressure | 959 hPa |
| Sea-level pressure | 1008 hPa |
| Wind speed (10 m) | 4 km/h |
| Wind gusts (10 m) | 10 km/h |
| Wind direction (10 m) | 165° (SSE) |
| Visibility | 7.7 km |
| UV index | 0.3 |
| Day / night | Day |
| Today max / min | 29°C / 24°C |
| Today feels-like max / min | 35°C / 29°C |
| Today precipitation sum | 26.6 mm |
| Today rain sum | 7.2 mm |
| Today snowfall sum | 0 cm |
| Today max precip probability | 100% |
| Today max wind / gusts | 11 km/h / 33 km/h |
| Dominant wind direction | 185° (S) |
| Sunrise / sunset | 5:41 AM / 7:03 PM |
| Daylight duration | 13h 22m |
| Sunshine duration | 10h 31m |
| Max UV index | 7.7 |
| Reference evapotranspiration (ET₀) | 3.72 mm |
| Topsoil moisture (0–1 cm) | 0.309 m³/m³ |
| Surface soil temperature | 25°C |
| US AQI | 51 |
| European AQI | 25 |
| PM2.5 | 7 µg/m³ |
| PM10 | 7.7 µg/m³ |
| Ozone (O₃) | 47 µg/m³ |
| Nitrogen dioxide (NO₂) | 4.5 µg/m³ |
| Sulphur dioxide (SO₂) | 1.2 µg/m³ |
| Carbon monoxide (CO) | 372 µg/m³ |
| Dust | 1 µg/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/th/chiang-rai/mae-sai" width="320" height="180" frameborder="0" title="Mae Sai weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Mae Sai tomorrow?
Rain is likely in Mae Sai tomorrow — the chance of precipitation reaches 90%, with around 4.3 mm expected.
What is the temperature in Mae Sai today?
Today Mae Sai sees thunderstorm with heavy hail with a high of 29 °C and a low of 24 °C.
How hot will it be in Mae Sai tomorrow?
Tomorrow's high in Mae Sai is forecast at 31 °C with thunderstorm with slight hail.
Is it windy in Mae Sai today?
No, not especially; gusts only reach up to 33 km/h today.
What is the UV index in Mae Sai today?
The UV index peaks at 8 today, which is high.
What time is sunrise and sunset in Mae Sai today?
The sun rises at 05:41 and sets at 19:03 local time.
Is the air quality in Mae Sai good today?
Air quality is moderate right now, with a US AQI reading of 51.