i think it would be cool if on outside maps say the base map is sunny and outside there building is sensor and when it rains it automatically changes the map from sun to rain, would change it every time i think 
what do you all think? it would mean the being 2 maps if you like but i think itwould be cool, be totaly random everytime and make it just generally more unique and fun every time and even going that bit further being able to do it so if it snows then on the map theres snow on the ground and its snowing!!
i think though if you go on said maps in forge and tha then itll just be sun or just rain etc but for matchmaking i think it would be brilliant, and if 343 added weather system on forge it would be easier then you think!! the thing about the sensor might be a bit hard but like even if its a manual thing that 343 have it auto just random all the time, i think it would be pretty cool, i dont think any game has that either, would save halo a bit more for me tbh means your constantly changing gaming styles and everything 
thoughts?