Jeepers. I have this same problem with my dirt biking buddies. They don't want to go ride because it's too hot, too dry, too dusty, clogs the air filter. But then in December they don't want to go because it's too cold, too wet, too muddy, wears the chain.
Whether you ride street or dirt, it can't always be 74 degrees, partly cloudy, with a 10mph ocean breeze. If you're waiting for a day like that, you'll have other obligations that day, and won't end up riding at all.
Seriously. I had friends who only rode once a month, and I thought they were slackers. Then it became once a year. Now some of these guys have gone up to two years without riding-- one of them keeps his dirt bike in my garage, so believe me, I know the facts-- either dirt or street.
[My rant gains momentum.]
When I point out to them how long it's been since they've shown their bike some love, they say, "Nawwww...it can't have been that long!" Used bike buyers beware: they say the same thing about oil changes, air filters, and other routine maintenance. They don't keep a log book, and constantly trick themselves into believing that they're keeping up with maintenance. But I keep a secret log book for their bikes-- easily done since I only have to jot down notes once every year or two-- along with my own bikes' log books, so I know for certain when the last time they changed the oil was. Typically these guys will go five to ten rides, or one, two, even four years (!) without changing the oil, but if I suggest they change it, they say, "Oh, I changed it just a couple rides ago, it should be O.K." For street bikes, they'll say, "a couple months ago" instead of "rides ago" but you get the idea.
My religion holds that even inanimate objects can have spiritual force. Maybe that sounds hokey to you but if you've ever felt awe at Yosemite or truly loved a bike, maybe you'll feel there's some truth to this. Anyway, eventually I take pity on the poor bikes and will do some maintenance myself and jot it down in my secret log-book, much as I would feed and shelter a lost dog.
To all you slacker motorcyclists out there: sell your bikes and put your energy elsewhere.