Thanks for the feedback. I didn't mean to imply averages aren't useful at all, I just mean averages alone exclude a lot of useful information. I certainly wouldn't choose a location just because last year it was perfect, but take the following example:

For Phuket, Thailand in June, Google's overview says 32°C/25°C with 18 days of rain. An avg. of 18 days of rain paints a very bleak picture. But what is their definition of a rainy day? Looking at observed weather from Phuket airport over past years many of the days had a few hours of rain or thunderstorms while the rest of the day was sunny.

That's hard to tell from averages alone and it might help someone decide whether travelling to Phuket during rainy season is actually worth it.

I think the ideal version is to have both averages and the day by day, hour by hour observed weather