For those seeking warm weather, the ideal time to visit Hanoi is in May, June and July. During these months, temperatures typically soar to an average of 32.9 °C, and you'll find that October, December and June are the sunniest months, with an average of 66.69 hours of sunshine.
Conversely, if you favor cooler weather, consider planning your trip to Hanoi in January, December or March. During this period, you can expect an average temperature of 14.59 °C.
For travelers indifferent to temperature but keen to steer clear of rain, it’s wise to avoid visiting during January, February and March, when the average precipitation in Hanoi reaches 8.25 mm. Instead, consider the drier months of January, February and March, which feature significantly lower rainfall, averaging only 0 mm.