[gvkv]

Interesting.

As far as I can tell though, it doesn't seem to account for humidity, pollution or wind patterns. The former is especially important for hot climates (or times of the year) since when it comes to comfort, hot dry >> hot humid.

[HNJohnC]

Yeah it doesn't account for a lot of stuff. I'm in a Mediterranean climate here and it's suggesting a lot of places that are very far from that. If it's supposed to be used for plant growing related purposes it's not going to be very useful.