Chiang Mai is typically warm in January.

Maximum temperatures go up compared to the previous month from +29°C to +30°C. The minimum temperature also goes down from +17°C to +16°C.

It’s generally warm, but pack a long-sleeve shirt for evenings.

January is one of the coolest months in Chiang Mai, here is the comparison with other months:

January weather is still as great as in December. It’s getting warmer as January arrives. The average maximum temperature goes up from +29°C to +30°C during the day. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 10 mm to 8 mm. It feels drier, as humidity decreases from 70% to 66%. The average wind speed doesn’t change much during January, staying around 0 m/s. The good news is there are likely to be more sunny days in January, from 18 to 22.

Next month (February) brings a further decline in the weather.

The climate in Chiang Mai in January has not changed much over the last 43 years.

The average temperature was the lowest in 2011 (+31°C) and the highest in 1998 (+34°C). The driest year was 1998 with only 604 mm of rainfall, and the wettest year was 1994 with 1462 mm.

For this page, we’ve looked at the typical weather in Chiang Mai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.