If you want to take it to the next level, use GIS information to account for building shadows and waiting times in stations and at traffic lights.
I just started using the metro instead :)
Todays busses don't even have heating in the winter. If I can't bike, I'm taking the car nowadays. Can't sit in a bus when it's -20 C outdoors and -18 indoors.
:-)
Reminder that not all busses are the same, and your experience is extremely localised to you - even different bus companies (or bus models used by a single company) in the same city can be completely different, yet alone different parts of the country, yet alone different countries.
Near me, for example, pretty much all busses have heating for the winter, and maybe half (random estimate) have AC for during hot weather while the other half just have windows/vents to open or shut.
Just that I have no idea where in the world your local busses are, and that you were speaking as if your experience was true of busses everywhere.