Call it Katy Perry, because this so-called “spring” feels straight out of her old lyrics: It’s hot then it’s cold; it’s yes then it’s no; it’s in then it’s out, it’s up then it’s down. And above all, it is tricky to dress for. When the temperatures can go from frosty to summery in a 24 hour period, figuring out what to wear for the day requires some careful calculations. I am fully ready to put my coats away and live in warm-weather styles, but the temperamental temps have made that impossible. I don’t want to default to boring basics though, so I’ve been falling back on these three easy outfit formulas for failsafe spring transitional weather looks: Oversized leather bomber jacket + fitted maxi dress + knee high boots (Image credit: Sarah Chiwaya) I’m simply not willing to forgo all the cool spring dresses on my to-wear list, so this combo is one of my go-to styling hacks to make them work for our weather.…