It’s no that any particular season is better for bodybuilding than others. It is more about covering up. In summers, it’s hot, obviously. The clothing is lesser, for both men and women. Therefore, more show of skin.
So, most men find this time to be particularly advantageous for the so called bulking phase,so that they can supposedly gain muscle. But gaining new muscle comes with gaining fat as well. Therefore, those extra layers of clothing that we spoke about earlier, comes in handy to hide all that extra fat.
Hope you understand that this is total bro science and has no logic behind it what so ever. What ever diet you follow should be sustainable and healthy. There will always be a little amount of fat that comes with gaining new muscle mass but can be easily managed by just slightly reducing calorie consumption
The Marvelous Fitness 