The most comfortable time to visit Chiang Rai is from late December to January. For sun, aim for late November to mid March.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, go from late November to mid March. It peaks in mid February, at 77. Avoid late April to early June for this: it falls to 20, mostly because it is too hot. The clearest skies come in March, when the sky is typically 21% covered at midday (mostly clear).
The being outside season here runs from late December to January. It peaks in late December, at 62. The weakest stretch is from mid April to early October, when it drops to 3, mostly because it is too hot.
Walking is not what Chiang Rai is for: the Active outdoors rating tops out at 26, mostly because it is too warm.
The year, measured
The average temperature in Chiang Rai over the whole year is 25°C. April is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 15°C. Chiang Rai has no sharply defined rainy season: the chance of rain on a given day runs from 47% in November, the driest month, to 70% in August, the wettest. Winds in Chiang Rai are highest in May, averaging 1.4 m/s (5 km/h), and lightest in November, at 0.9 m/s (3 km/h). The prevailing wind is from the SE. The clearest skies in Chiang Rai come in March, when the sky is typically 22% covered; August is the cloudiest month, at 75%.
Month by month Chiang Rai climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 25°C | 15°C | 26°C | 60% | 36% | 1.0 m/s | 59 | 62 | 22 |
| February | 27°C | 16°C | 28°C | 62% | 23% | 1.1 m/s | 41 | 73 | 11 |
| March | 30°C | 19°C | 32°C | 48% | 22% | 1.1 m/s | 13 | 60 | 3 |
| April | 32°C | 22°C | 34°C | 63% | 36% | 1.3 m/s | 7 | 28 | 2 |
| May | 32°C | 24°C | 35°C | 64% | 53% | 1.4 m/s | 4 | 21 | 1 |
| June | 30°C | 25°C | 34°C | 62% | 66% | 1.4 m/s | 4 | 24 | 1 |
| July | 29°C | 24°C | 34°C | 68% | 71% | 1.4 m/s | 4 | 27 | 2 |
| August | 29°C | 24°C | 33°C | 70% | 75% | 1.4 m/s | 5 | 30 | 2 |
| September | 29°C | 24°C | 34°C | 70% | 63% | 1.1 m/s | 5 | 27 | 2 |
| October | 29°C | 22°C | 33°C | 64% | 54% | 1.0 m/s | 9 | 40 | 3 |
| November | 28°C | 20°C | 31°C | 47% | 41% | 0.9 m/s | 20 | 61 | 6 |
| December | 26°C | 16°C | 27°C | 56% | 35% | 0.9 m/s | 50 | 63 | 19 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Chiang Rai weather by season
Year round, Chiang Rai has days of about 25°C at their warmest in January, its coolest month, and 32°C in April, its warmest; the coolest hours of the day run from 15°C to 25°C through the year, and the average temperature over the year is 25°C around the clock. Rain is most likely around August and least likely around November. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Chiang Rai weather in winterDecember to February
Winter in Chiang Rai has typical daily highs of about 26°C and lows of about 16°C, with a 60% chance of rain on a given day.
Chiang Rai weather in springMarch to May
Spring in Chiang Rai has typical daily highs of about 31°C and lows of about 22°C, with a 58% chance of rain on a given day.
Chiang Rai weather in summerJune to August
Summer in Chiang Rai has typical daily highs of about 30°C and lows of about 24°C, with a 67% chance of rain on a given day.
Chiang Rai weather in autumnSeptember to November
Autumn in Chiang Rai has typical daily highs of about 29°C and lows of about 22°C, with a 60% chance of rain on a given day.
When is the rainy season in Chiang Rai?
Chiang Rai has no sharply defined rainy season: the chance of rain on a given day runs from 47% in November, the driest month, to 70% in August, the wettest.
What time of year is Chiang Rai windiest?
Winds in Chiang Rai are highest in May, averaging 1.4 m/s (5 km/h), and lightest in November, at 0.9 m/s (3 km/h). The prevailing wind is from the SE.
What is the average temperature in Chiang Rai year round?
The average temperature in Chiang Rai over the whole year is 25°C. April is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 15°C.
Where to go instead in early June, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.