Summers are the coldest seasons

[zgrssd]

I rolled a planet, 20°C planetology temperature. I got 5 Seasons, 3 Normal + Early and Late Summer.
And now I noticed: The two summers are the coldest seasons on the planet! Wich runs coutner to the very definition of Summer - but right into definition of winter.

In Summer:
- the Tropical Region, drops from ~31°C to 25°C
- the Antarctic from ~4°C to 2°C
Only the Arctic is relative stable year round.