The best time to be in Ha Giang is in the dry season, in the months from October to April. It is not good to go to this mountainous area during the rainy season (May to September). The average temperature is approximately the same as in Hanoi. But in the mountain areas the weather can change quickly. However, the amount of precipitation in the rainy season is higher than in Hanoi. The roads can be very dangerous here, but if you would like to come in rainy season it’s also very beautiful everything is green color, but it’s will be better if you choose to do you trip with a Car or Jeep.