Looks like your May weather is about like ours here. Get out and ride. There's not really another way. I know people with 40 hr. jobs, wife and kids who ride 20,000 miles/year. It's just priorities. Nothing wrong if biking isn't a priority, but then don't complain if you don't ride as well as folks for whom it is. I ride 52 weeks/year. If I can't go out, I ride rollers.