I would love to actually implement something like this that gives a very clear picture of when the weather is best (using last 5/10/15 years) for travel. Things

I would love to actually implement something like this that gives a very clear picture of when the weather is best (using last 5/10/15 years) for travel. Things like humidity and UV index matter but I have yet to find a historical source for that data. Anyone have a source that they like?