Climate
Vietnam spans several climatic zones, resulting in substantial weather condition variations between the north and the south. Average temperatures year round range from 20 to 35 degrees Celsius so there is no particularly good or bad time to visit Vietnam.

I- In southern Vietnam: there are two seasons
+ The Wet season : from May to November Average temperatures : 25 to 35 degrees Celsius Humidity ranges between 75% and 85% Rain : Downpour 4 to 10 times / a week Sun : Scorching sun everyday	+ The Dry season : from December to April Average temperatures : 20 to 26 degrees Celsius Humidity ranges between 65% and 75% Rain : Drizzle down 10 to 20 times / a week Sun : Light Sun everyday
II- In north Vietnam : there are four seasons
+ Spring : Febraury, March, April Average temperatures : 18 to 24 degrees Celsius Humidity ranges between 40% and 55% Rain : Drizzle down 15 to 25 times / a week Sun : Light Sun some days + Summer : May, June, July Average temperatures : 28 to 36 degrees Celsius Humidity ranges between 75% and 85% Rain : Downpour 4 to 6 times / a week Sun : Scorching Sun almost everyday	+ Autumn : August, September, October Average temperatures : 20 to 28 degrees Celsius Humidity ranges between 45% and 55% Rain : autumn rain 2 to 4 times / a week Sun : autumn Sun, almost everyday + Winter : November, December ,January Average temperatures : 10 to 25 degrees Celsius Humidity ranges between 35% and 40% Rain : Drizzle down 4 to 6 times / a week Sun : Light Sun some days High tourist seasons : in Vietnam runs from November to March Lower tourist seasons : in Vietnam runs from April to September