As in most Northern Vietnam, Da Bac has a distinct winter and summer season. The cool but mostly dry winter lasts from November to March with the average temperatures ranging from 17 to 22°C. During the most cold months, the temperature can drop to below 10°C. This is the best time to visit Da Bac if you want to experience trekking and hiking.
Summer lasts from April to November when it is hot and humid and the region experiences its highest rainfall. July to September are often the wettest months of the year, so it is unadvisable to do trekking and hiking activities during this period. However, if you want to go sightseeing, swimming or kayaking, this time is ideal as the region is covered by the green cornfields and the lake and brooks are filled up with fresh water.
Bring with you casual clothes, hats, and comfortable shoes/sandals. If it is winter, don’t forget to prepare some warm clothes. Mosquito and insect repellent may be useful, too, especially during the humid period.
More particular items that you need to prepare include a proper sleeping bag and a good pair of trekking shoes for trekking/hiking as well as a comfortable swimsuit for swimming.