Autumn is the perfect time to visit Hanoi when the weather is less humid and cool. September to November are recommended months to travel to Hanoi because the weather is cool down compared to summer but the sky is still blue. In this period, you can also enjoy the joyful Mid-Autumn Festival. Many other foreign tourists prefer coming in spring (Feb-Apr) to enjoy a warmer weather, regardless of possibly dragging drizzle, during Tet Festival, Vietnam’s traditional Lunar New Year. It is hot and sticky in the summer months (May-Sep) with the common temps of 36°C (86-97°F), but is perfect for lazing and sun baking on the pristine beaches around Hanoi including: Ha long bay, Cat Ba Island, Do Son Beach, Tay Thien Mau, Khoang Xanh, etc.