Best time to visit Mae Sai
The best time to visit Mae Sai is January, judged on twenty years of weather records and the events worth going for.
Mae Sai, Chiang Rai, Thailand
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 27.5 °C / 82 °F | 13.9 °C / 57 °F | 31 mm / 1.2 in | best month |
| February | 30.7 °C / 87 °F | 14.4 °C / 58 °F | 14 mm / 0.5 in | good month |
| March | 33.6 °C / 92 °F | 17.4 °C / 63 °F | 27 mm / 1 in | neither best nor good |
| April | 34.4 °C / 94 °F | 21.3 °C / 70 °F | 96 mm / 3.8 in | neither best nor good |
| May | 33.1 °C / 92 °F | 23.4 °C / 74 °F | 235 mm / 9.3 in | neither best nor good |
| June | 31.9 °C / 89 °F | 24.4 °C / 76 °F | 319 mm / 12.6 in | neither best nor good |
| July | 31 °C / 88 °F | 24.3 °C / 76 °F | 437 mm / 17.2 in | neither best nor good |
| August | 30.9 °C / 88 °F | 24.1 °C / 75 °F | 426 mm / 16.8 in | neither best nor good |
| September | 31.3 °C / 88 °F | 23.7 °C / 75 °F | 286 mm / 11.2 in | neither best nor good |
| October | 30.6 °C / 87 °F | 22.1 °C / 72 °F | 144 mm / 5.7 in | neither best nor good |
| November | 29.3 °C / 85 °F | 18.6 °C / 65 °F | 48 mm / 1.9 in | good month |
| December | 27.1 °C / 81 °F | 15.2 °C / 59 °F | 27 mm / 1.1 in | good month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: best
- FFebruary: good
- MMarch: neither
- AApril: neither
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: good
- DDecember: good
- Best
- January
- Good
- February, November–December
Why these months
January · best
In its favour: feels like (high) 28.8 °C / 84 °F, precipitation 31 mm / 1.2 in, share of daylight that is sunny 92%, average daily high 27.5 °C / 82 °F, wet days 3.9 days, days with heavy rain 1.1 days, average daily low 13.9 °C / 57 °F.
Against: relative humidity 80%.
February · good
In its favour: precipitation 14 mm / 0.5 in, share of daylight that is sunny 93%, wet days 2.6 days, days with heavy rain 0.2 days, average daily low 14.4 °C / 58 °F, relative humidity 72%.
Against: feels like (high) 31.9 °C / 89 °F, average daily high 30.7 °C / 87 °F.
November · good
In its favour: precipitation 48 mm / 1.9 in, share of daylight that is sunny 85%, wet days 7 days, days with heavy rain 1.6 days, average daily high 29.3 °C / 85 °F, average daily low 18.6 °C / 65 °F.
Against: feels like (high) 32.7 °C / 91 °F, relative humidity 83%.
December · good
In its favour: feels like (high) 29.1 °C / 84 °F, precipitation 27 mm / 1.1 in, share of daylight that is sunny 89%, average daily high 27.1 °C / 81 °F, wet days 4.1 days, days with heavy rain 0.5 days, average daily low 15.2 °C / 59 °F.
Against: relative humidity 82%.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Jade Dragon Mountain, 743 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 28.8 °C | 31.9 °C | 35.6 °C | 38.3 °C | 38.5 °C | 37.6 °C | 36.9 °C | 36.8 °C | 37.2 °C | 35.5 °C | 32.7 °C | 29.1 °C |
| Days with heavy rain | 1.1 days | 0.2 days | 0.9 days | 3.4 days | 9.2 days | 14.3 days | 18.4 days | 16 days | 10.2 days | 4.5 days | 1.6 days | 0.5 days |
| Time rain usually falls | 1 pm | 6 pm | 4 pm | 4 pm | 4 pm | 4 pm | 2 am | 2 am | 1 am | 1 am | 4 pm | 12 pm |
| Sunshine per day | 10.1 h | 10.6 h | 10.9 h | 11.2 h | 10.3 h | 8.9 h | 7.1 h | 7.1 h | 8.5 h | 9.5 h | 9.5 h | 9.7 h |
| Relative humidity | 80% | 72% | 66% | 69% | 78% | 82% | 85% | 86% | 84% | 84% | 83% | 82% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 16.6 µg/m³ | 23.7 µg/m³ | 42.6 µg/m³ | 42.7 µg/m³ | 19.2 µg/m³ | 11.3 µg/m³ | 9.5 µg/m³ | 8.8 µg/m³ | 8.5 µg/m³ | 9.5 µg/m³ | 10.8 µg/m³ | 13.7 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 23.2 µg/m³ | 34.1 µg/m³ | 61 µg/m³ | 64.6 µg/m³ | 29.2 µg/m³ | 18.2 µg/m³ | 15.7 µg/m³ | 14.8 µg/m³ | 14.4 µg/m³ | 15.2 µg/m³ | 17 µg/m³ | 20.1 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.