The tropical monsoon climate is divided into the rainy and dry seasons. The most distinctive characteristic of Hanoi's climate is the fluctuations between the cold and hot seasons.
In March, the month when the conference will take place, the average temperature in Hanoi are messured at about 22 degree Celcisus (22°C). The maximum annual temperature can reach 35 degree Celcisus (35°C), and maybe go down to minimum one at about 12 degree Celcisus (12°C).
More daily city weather forcast can be found here.