Best Time to Visit
 

Is there any one forum or site that shows the best time to visit all countries.
It should take into account extreme weather, rainfall amounts, if a beach what months are best, when are school holidays when families travel etc?

lonely planet's website has info on each country, recommend their books as well

"Best" is always going to be subjective, and therefore a personal decision for each traveller. Some may prefer to visit at the hottest time of year when they can fry on the beach and swim in warm water. Others may prefer to visit when it's cooler and not as crowded. Some may want to visit when a particular festival is underway, others may prefer to avoid it.