I need to visualize in a map the best month to do something in an area.
I've thought of classifying months in 4 groups: (Dec, Jan, Feb // Mar, Apr, May // Jun, Jul, Aug // Sept, Oct, Nov) and displaying them by colors according the season temperature: Blue - cold, red - warm.
The problem that I find with this approach is that it is a global map, and does not make much sense to show January and February with the same color in Australia and Italy.
Any Idea on how I could display global month/season data in a map having in count this?