The best time to visit Vietnam is spring (February to April) and autumn (August to October). The temperatures are more moderate and rainfall is lighter. In spring, March and April have the lowest rainfall across all destinations and temperatures are pleasant, though still cool in the far north.
I have been living in Vietnam for more than 1 year now. It'd be raining during that time so I'd not recommend if you are not comfortable tin travelling in rainy season.
The best time to visit Vietnam is spring (February to April) and autumn (August to October). The temperatures are more moderate and rainfall is lighter. In spring, March and April have the lowest rainfall across all destinations and temperatures are pleasant, though still cool in the far north.