Every time I think I'm starting to figure out how a given weather pattern affects fishing, I have an experience that blows my running theory out of the water. This spring has been particularly confounding, and I'm almost back to where I was before I started trying to figure this stuff out, which was just to go fishing anytime I could go, because no matter what, it beats sitting on the couch or doing stuff you don't want to do. That said, you know to take my suggestions with a grain of salt....
I have observed a lot but learned next to nothing from my fishing this spring. I've had what appear to be practically identical weather conditions produce vastly different levels of feeding activity.
As regards bluebird skies: they are often associated with high, persistent barometric pressure. There are a lot of theories on why and how this affects fishing, and the only thing everyone agrees on is that there are exceptions to every "rule." It looks like the barometer has been fairly steady lately, and not very high, so it might have nothing to do with the past few days. Either way, when you find slow biters, slowing/sizing down your presentation or fishing tight to structure can help, but some days just plain suck. It's particularly frustrating when you see bugs hatching and nothing eating them this time of year; that's a sure sign the fish are in hiding (not biting) mode. You can still catch fish on those days, but it's a low, slow, PATIENT game. The patience is the hardest part for me sometimes....